{"id":2317,"date":"2026-05-27T18:52:17","date_gmt":"2026-05-27T10:52:17","guid":{"rendered":"http:\/\/www.preluna.xyz\/?p=2317"},"modified":"2026-05-28T17:52:59","modified_gmt":"2026-05-28T09:52:59","slug":"%e8%a1%a5%e7%a0%81%e5%ae%9a%e7%82%b9%e6%95%b4%e6%95%b0%e7%ae%97%e6%9c%af","status":"publish","type":"post","link":"http:\/\/www.preluna.xyz\/index.php\/2026\/05\/27\/%e8%a1%a5%e7%a0%81%e5%ae%9a%e7%82%b9%e6%95%b4%e6%95%b0%e7%ae%97%e6%9c%af\/preluna\/text\/","title":{"rendered":"\u8865\u7801\u5b9a\u70b9\u6574\u6570\u7b97\u672f"},"content":{"rendered":"\n
\"\"<\/div><\/figure>\n\n\n\n

\u7b54\u6848\u5148\u6c47\u603b\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\u9898\u53f7<\/th>\u7b54\u6848<\/th><\/tr><\/thead>
03<\/td>0101 0100<\/code>\uff0c\u6309\u9009\u9879\u9009\u5bf9\u5e94\u8fd9\u4e00\u9879<\/td><\/tr>
04<\/td>D\uff0cC0H<\/code><\/td><\/tr>
05<\/td>D\uff0c1100 1010<\/code><\/td><\/tr>
06<\/td>C\uff0cCB8H<\/code><\/td><\/tr>
07<\/td>C\uff0c74H, DDH<\/code><\/td><\/tr>
08<\/td>C<\/td><\/tr>
09<\/td>A<\/td><\/tr>
10<\/td>C\uff0cr\u2081 \u00d7 r\u2082<\/code><\/td><\/tr>
11<\/td>B<\/td><\/tr>
12<\/td>B\uff0c01<\/code><\/td><\/tr>
13<\/td>C0 \u2295 C1 = 1<\/code>\uff0c\u5373\u4e8c\u8005\u4e00\u4e2a\u6709\u8fdb\u4f4d\u3001\u4e00\u4e2a\u65e0\u8fdb\u4f4d\u65f6\u6ea2\u51fa<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u4e0b\u9762\u9010\u9898\u8bb2\u3002<\/p>\n\n\n\n

03 \u9898\uff1a\u8865\u7801\u5b9a\u70b9\u6574\u6570\u7b97\u672f\u5de6\u79fb\u4e24\u4f4d<\/h2>\n\n\n\n

\u9898\u76ee\u662f\uff1a<\/p>\n\n\n\n

0101 0101<\/code> \u7b97\u672f\u5de6\u79fb\u4e24\u4f4d\u3002<\/p>\n\n\n\n

\u8865\u7801\u7684\u7b97\u672f\u5de6\u79fb\uff0c\u5728\u4f4d\u5f62\u64cd\u4f5c\u4e0a\u53ef\u4ee5\u6309\u201c\u6574\u4f53\u5de6\u79fb\uff0c\u4f4e\u4f4d\u8865 0\u201d\u5904\u7406\u3002\u4e5f\u5c31\u662f\uff1a<\/p>\n\n\n\n

0101 0101 \u5de6\u79fb 1 \u4f4d -> 1010 1010\n1010 1010 \u5de6\u79fb 1 \u4f4d -> 0101 0100\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u5bc4\u5b58\u5668\u4e2d\u7684\u7ed3\u679c\u4f4d\u5f62\u662f\uff1a<\/p>\n\n\n\n
0101 0100\n<\/code><\/pre>\n\n\n\n
\u4f46\u8fd9\u91cc\u8981\u6ce8\u610f\u4e00\u4e2a\u8003\u7814\u6613\u9519\u70b9\uff1a0101 0101<\/code> \u662f\u6b63\u6570\uff0c\u5341\u8fdb\u5236\u4e3a 85<\/code>\u3002\u5de6\u79fb\u4e24\u4f4d\u672c\u8d28\u4e0a\u76f8\u5f53\u4e8e\u4e58\u4ee5 4<\/code>\uff0c\u5e94\u5f97\u5230 340<\/code>\uff0c\u800c 8 \u4f4d\u8865\u7801\u6574\u6570\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n
-128 ~ +127\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u6570\u5b66\u7ed3\u679c\u5df2\u7ecf\u8d85\u51fa\u8303\u56f4\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u9898\u76ee\u82e5\u53ea\u95ee\u201c\u5de6\u79fb\u540e\u7684\u673a\u5668\u4f4d\u5f62\u201d\uff0c\u7ed3\u679c\u662f 0101 0100<\/code>\uff1b\u82e5\u95ee\u201c\u662f\u5426\u6ea2\u51fa\u201d\uff0c\u5219\u53d1\u751f\u6ea2\u51fa\u3002<\/p>\n\n\n\n
04 \u9898\uff1a\u7b97\u672f\u5de6\u79fb\u4e0d\u4f1a\u53d1\u751f\u6ea2\u51fa\u7684\u662f\u54ea\u4e00\u4e2a<\/h2>\n\n\n\n
\u5224\u65ad\u8865\u7801\u5de6\u79fb\u4e00\u4f4d\u662f\u5426\u6ea2\u51fa\uff0c\u6700\u5feb\u65b9\u6cd5\u662f\u770b\u5de6\u79fb\u524d\u6700\u9ad8\u4e24\u4f4d\u662f\u5426\u76f8\u540c\u3002<\/p>\n\n\n\n
\u5bf9\u4e8e 8 \u4f4d\u8865\u7801\uff1a<\/p>\n\n\n\n
\u82e5\u7b26\u53f7\u4f4d\u548c\u6700\u9ad8\u6570\u503c\u4f4d\u76f8\u540c\uff0c\u5de6\u79fb\u4e00\u4f4d\u4e0d\u6ea2\u51fa\uff1b\n\u82e5\u7b26\u53f7\u4f4d\u548c\u6700\u9ad8\u6570\u503c\u4f4d\u4e0d\u540c\uff0c\u5de6\u79fb\u4e00\u4f4d\u6ea2\u51fa\u3002\n<\/code><\/pre>\n\n\n\n
\u9010\u4e2a\u770b\uff1a<\/p>\n\n\n\n
80H = 1000 0000\uff0c\u6700\u9ad8\u4e24\u4f4d\u662f 10\uff0c\u6ea2\u51fa\n90H = 1001 0000\uff0c\u6700\u9ad8\u4e24\u4f4d\u662f 10\uff0c\u6ea2\u51fa\nB0H = 1011 0000\uff0c\u6700\u9ad8\u4e24\u4f4d\u662f 10\uff0c\u6ea2\u51fa\nC0H = 1100 0000\uff0c\u6700\u9ad8\u4e24\u4f4d\u662f 11\uff0c\u4e0d\u6ea2\u51fa\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n
D. C0H\n<\/code><\/pre>\n\n\n\n
\u8fd9\u7c7b\u9898\u4e0d\u8981\u5148\u8f6c\u5341\u8fdb\u5236\uff0c\u76f4\u63a5\u770b\u6700\u9ad8\u4e24\u4f4d\u6700\u5feb\u3002<\/p>\n\n\n\n
05 \u9898\uff1a\u8865\u7801\u5b9a\u70b9\u6574\u6570\u53f3\u79fb\u4e00\u4f4d<\/h2>\n\n\n\n
\u9898\u76ee\u662f\uff1a<\/p>\n\n\n\n
1001 0101 \u53f3\u79fb\u4e00\u4f4d\n<\/code><\/pre>\n\n\n\n
\u8865\u7801\u7b97\u672f\u53f3\u79fb\u7684\u89c4\u5219\u662f\uff1a\u9ad8\u4f4d\u8865\u7b26\u53f7\u4f4d\uff0c\u4f4e\u4f4d\u79fb\u51fa\u3002<\/p>\n\n\n\n
\u539f\u6570\u6700\u9ad8\u4f4d\u662f 1<\/code>\uff0c\u8bf4\u660e\u662f\u8d1f\u6570\uff0c\u6240\u4ee5\u53f3\u79fb\u65f6\u5de6\u8fb9\u8865 1<\/code>\uff1a<\/p>\n\n\n\n
1001 0101\n\u53f3\u79fb\u4e00\u4f4d\n1100 1010\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n
D. 1100 1010\n<\/code><\/pre>\n\n\n\n
\u8865\u7801\u53f3\u79fb\u9898\u7684\u5173\u952e\u662f\uff1a\u4e0d\u662f\u5de6\u8fb9\u8865 0\uff0c\u800c\u662f\u8865\u7b26\u53f7\u4f4d\u3002<\/p>\n\n\n\n
06 \u9898\uff1a\u4e24\u4e2a\u5341\u516d\u8fdb\u5236\u673a\u5668\u6570\u76f8\u52a0<\/h2>\n\n\n\n
\u9898\u76ee\u662f\uff1a<\/p>\n\n\n\n
7E5H + 4D3H\n<\/code><\/pre>\n\n\n\n
\u76f4\u63a5\u6309\u5341\u516d\u8fdb\u5236\u52a0\u6cd5\u7b97\uff1a<\/p>\n\n\n\n
    7 E 5\n+   4 D 3\n-----------\n    C B 8\n<\/code><\/pre>\n\n\n\n
\u5177\u4f53\u8fc7\u7a0b\uff1a<\/p>\n\n\n\n
5 + 3 = 8\n\nE + D = 14 + 13 = 27\n27 = 1B\uff0c\u6240\u4ee5\u672c\u4f4d\u5199 B\uff0c\u5411\u9ad8\u4f4d\u8fdb 1\n\n7 + 4 + 1 = C\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u7ed3\u679c\u662f\uff1a<\/p>\n\n\n\n
CB8H\n<\/code><\/pre>\n\n\n\n
\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n
C\n<\/code><\/pre>\n\n\n\n
07 \u9898\uff1aBAH \u7684\u7b97\u672f\u5de6\u79fb\u548c\u7b97\u672f\u53f3\u79fb<\/h2>\n\n\n\n
\u9898\u76ee\u7ed9\u51fa\u673a\u5668\u6570\u5b57\u957f\u4e3a 8 \u4f4d\uff0c\u673a\u5668\u6570 BAH<\/code> \u4e3a\u8865\u7801\u3002<\/p>\n\n\n\n
\u5148\u628a BAH<\/code> \u8f6c\u6210\u4e8c\u8fdb\u5236\uff1a<\/p>\n\n\n\n
B = 1011\nA = 1010\n\nBAH = 1011 1010\n<\/code><\/pre>\n\n\n\n
\u7b97\u672f\u5de6\u79fb 1 \u4f4d\uff1a\u6574\u4f53\u5de6\u79fb\uff0c\u4f4e\u4f4d\u8865 0\uff1a<\/p>\n\n\n\n
1011 1010 \u5de6\u79fb 1 \u4f4d -> 0111 0100\n<\/code><\/pre>\n\n\n\n
0111 0100<\/code> \u8f6c\u5341\u516d\u8fdb\u5236\uff1a<\/p>\n\n\n\n
0111 = 7\n0100 = 4\n\n\u6240\u4ee5\u662f 74H\n<\/code><\/pre>\n\n\n\n
\u7b97\u672f\u53f3\u79fb 1 \u4f4d\uff1a\u9ad8\u4f4d\u8865\u7b26\u53f7\u4f4d\u3002\u539f\u6570\u7b26\u53f7\u4f4d\u662f 1<\/code>\uff0c\u6240\u4ee5\u5de6\u8fb9\u8865 1<\/code>\uff1a<\/p>\n\n\n\n
1011 1010 \u53f3\u79fb 1 \u4f4d -> 1101 1101\n<\/code><\/pre>\n\n\n\n
1101 1101<\/code> \u8f6c\u5341\u516d\u8fdb\u5236\uff1a<\/p>\n\n\n\n
1101 = D\n1101 = D\n\n\u6240\u4ee5\u662f DDH\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n
74H, DDH\n<\/code><\/pre>\n\n\n\n
\u9009\uff1a<\/p>\n\n\n\n
C\n<\/code><\/pre>\n\n\n\n
\u8fd9\u91cc\u4e5f\u6709\u4e00\u4e2a\u6613\u9519\u70b9\uff1aBAH<\/code> \u662f\u8d1f\u6570\uff0c\u5de6\u79fb\u540e\u53d8\u6210\u4e86 74H<\/code>\uff0c\u7b26\u53f7\u53d8\u4e86\uff0c\u6240\u4ee5\u8fd9\u4e2a\u5de6\u79fb\u7ed3\u679c\u5b9e\u9645\u4e0a\u5df2\u7ecf\u6ea2\u51fa\u3002\u4f46\u9898\u76ee\u95ee\u7684\u662f\u201c\u79fb\u4f4d\u540e\u5206\u522b\u5f97\u4ec0\u4e48\u4f4d\u5f62\u201d\uff0c\u6240\u4ee5\u4ecd\u6309\u673a\u5668\u79fb\u4f4d\u7ed3\u679c\u9009 74H, DDH<\/code>\u3002<\/p>\n\n\n\n
08 \u9898\uff1a\u5b9a\u70b9\u8fd0\u7b97\u5668\u4e2d\u5fc5\u987b\u6709\u4ec0\u4e48\u7535\u8def<\/h2>\n\n\n\n
\u9898\u76ee\u95ee\uff1a\u65e0\u8bba\u91c7\u7528\u53cc\u7b26\u53f7\u4f4d\u8fd8\u662f\u5355\u7b26\u53f7\u4f4d\uff0c\u5fc5\u987b\u6709\u4ec0\u4e48\uff1f<\/p>\n\n\n\n
\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n
\u6ea2\u51fa\u5224\u65ad\u7535\u8def\n<\/code><\/pre>\n\n\n\n
\u5355\u7b26\u53f7\u4f4d\u8865\u7801\u52a0\u51cf\u6cd5\u53ef\u4ee5\u7528\u8fdb\u4f4d\u5173\u7cfb\u5224\u65ad\u6ea2\u51fa\uff1b\u53cc\u7b26\u53f7\u4f4d\u8865\u7801\u53ef\u4ee5\u7528\u4e24\u4e2a\u7b26\u53f7\u4f4d\u662f\u5426\u76f8\u540c\u5224\u65ad\u6ea2\u51fa\u3002\u8fd9\u4e9b\u5224\u65ad\u672c\u8d28\u4e0a\u5e38\u7528\u5f02\u6216\u903b\u8f91\u5b9e\u73b0\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n
C. \u6ea2\u51fa\u5224\u65ad\u7535\u8def\uff0c\u5b83\u4e00\u822c\u7528\u201c\u5f02\u6216\u201d\u95e8\u6765\u5b9e\u73b0\n<\/code><\/pre>\n\n\n\n
09 \u9898\uff1a\u673a\u5668\u8fd0\u7b97\u4ea7\u751f\u6ea2\u51fa\u7684\u6839\u672c\u539f\u56e0<\/h2>\n\n\n\n
\u6ea2\u51fa\u7684\u6839\u672c\u539f\u56e0\u4e0d\u662f\u201c\u7b26\u53f7\u4f4d\u8fdb\u4f4d\u4e22\u5f03\u201d\uff0c\u4e5f\u4e0d\u662f\u201c\u8fd0\u7b97\u53d1\u751f\u9519\u8bef\u201d\uff0c\u800c\u662f\uff1a<\/p>\n\n\n\n
\u673a\u5668\u5b57\u957f\u6709\u9650\uff0c\u80fd\u8868\u793a\u7684\u6570\u503c\u8303\u56f4\u6709\u9650\u3002\n<\/code><\/pre>\n\n\n\n
\u4f8b\u5982 8 \u4f4d\u8865\u7801\u53ea\u80fd\u8868\u793a\uff1a<\/p>\n\n\n\n
-128 ~ +127\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u5b9e\u9645\u6570\u5b66\u7ed3\u679c\u8d85\u8fc7\u8fd9\u4e2a\u8303\u56f4\uff0c\u5c31\u4f1a\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n
A. \u5bc4\u5b58\u5668\u7684\u4f4d\u6570\u6709\u9650\n<\/code><\/pre>\n\n\n\n
10 \u9898\uff1a\u5224\u65ad\u54ea\u4e2a\u8fd0\u7b97\u4f1a\u6ea2\u51fa<\/h2>\n\n\n\n
\u9898\u76ee\u7ed9\u51fa\uff1a<\/p>\n\n\n\n
r\u2081 = F5H\nr\u2082 = EEH\n<\/code><\/pre>\n\n\n\n
\u90fd\u662f 8 \u4f4d\u8865\u7801\u3002<\/p>\n\n\n\n
\u5148\u8f6c\u6210\u5341\u8fdb\u5236\u3002<\/p>\n\n\n\n
F5H<\/code> \u662f\u8d1f\u6570\uff0c\u56e0\u4e3a\u6700\u9ad8\u4f4d\u4e3a 1\u3002\u53ef\u4ee5\u7528\u201c\u65e0\u7b26\u53f7\u503c – 256\u201d\uff1a<\/p>\n\n\n\n
F5H = 245\n245 - 256 = -11\n\n\u6240\u4ee5 r\u2081 = -11\n<\/code><\/pre>\n\n\n\n
EEH<\/code>\uff1a<\/p>\n\n\n\n
EEH = 238\n238 - 256 = -18\n\n\u6240\u4ee5 r\u2082 = -18\n<\/code><\/pre>\n\n\n\n
8 \u4f4d\u8865\u7801\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n
-128 ~ +127\n<\/code><\/pre>\n\n\n\n
\u9010\u9879\u5224\u65ad\uff1a<\/p>\n\n\n\n
A. r\u2081 + r\u2082 = -11 + (-18) = -29\uff0c\u4e0d\u6ea2\u51fa\n\nB. r\u2081 - r\u2082 = -11 - (-18) = 7\uff0c\u4e0d\u6ea2\u51fa\n\nC. r\u2081 \u00d7 r\u2082 = (-11) \u00d7 (-18) = 198\uff0c\u8d85\u8fc7 +127\uff0c\u6ea2\u51fa\n\nD. r\u2081 \/ r\u2082 = (-11) \/ (-18)\uff0c\u7ed3\u679c\u4e0d\u53ef\u80fd\u8d85\u51fa 8 \u4f4d\u8865\u7801\u8303\u56f4\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n
C. r\u2081 \u00d7 r\u2082\n<\/code><\/pre>\n\n\n\n
\u8fd9\u79cd\u9898\u7684\u5173\u952e\u662f\u5148\u628a\u5341\u516d\u8fdb\u5236\u8865\u7801\u8f6c\u6210\u771f\u503c\uff0c\u518d\u770b\u7ed3\u679c\u662f\u5426\u8d85\u51fa\u8868\u793a\u8303\u56f4\u3002<\/p>\n\n\n\n
11 \u9898\uff1a\u5173\u4e8e\u6a21 4 \u8865\u7801<\/h2>\n\n\n\n
\u6a21 4 \u8865\u7801\u4e5f\u53eb\u53d8\u5f62\u8865\u7801\uff0c\u5e38\u89c1\u7279\u70b9\u662f\u4f7f\u7528\u53cc\u7b26\u53f7\u4f4d\u6765\u5224\u65ad\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u5408\u6cd5\u7684\u53cc\u7b26\u53f7\u4f4d\u72b6\u6001\u662f\uff1a<\/p>\n\n\n\n
00\uff1a\u6b63\u6570\n11\uff1a\u8d1f\u6570\n<\/code><\/pre>\n\n\n\n
\u53d1\u751f\u6ea2\u51fa\u65f6\uff1a<\/p>\n\n\n\n
01\uff1a\u6b63\u6ea2\u51fa\n10\uff1a\u8d1f\u6ea2\u51fa\n<\/code><\/pre>\n\n\n\n
\u4f46\u5b58\u50a8\u65f6\u4e0d\u4e00\u5b9a\u771f\u7684\u4fdd\u5b58\u4e24\u4e2a\u7b26\u53f7\u4f4d\u3002\u56e0\u4e3a\u6ca1\u6709\u6ea2\u51fa\u65f6\uff0c\u4e24\u4e2a\u7b26\u53f7\u4f4d\u5fc5\u7136\u76f8\u540c\uff0c\u6240\u4ee5\u5b58\u50a8\u6bcf\u4e2a\u6a21 4 \u8865\u7801\u65f6\u53ea\u9700\u8981\u4fdd\u5b58\u4e00\u4e2a\u7b26\u53f7\u4f4d\uff1b\u8fdb\u5165\u8fd0\u7b97\u5668\u8fd0\u7b97\u65f6\u518d\u6269\u5c55\u6210\u53cc\u7b26\u53f7\u4f4d\u5373\u53ef\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u6b63\u786e\u8bf4\u6cd5\u662f\uff1a<\/p>\n\n\n\n
B. \u6bcf\u4e2a\u6a21 4 \u8865\u7801\u5b58\u50a8\u65f6\u53ea\u9700\u8981\u4e00\u4e2a\u7b26\u53f7\u4f4d\n<\/code><\/pre>\n\n\n\n
\u6613\u9519\u70b9\u5728\u4e8e\uff1a\u6a21 4 \u8865\u7801\u201c\u8fd0\u7b97\u65f6\u7528\u53cc\u7b26\u53f7\u4f4d\u201d\uff0c\u4f46\u201c\u5b58\u50a8\u65f6\u53ea\u9700\u4e00\u4e2a\u7b26\u53f7\u4f4d\u201d\u3002\u4e0d\u8981\u628a\u8fd9\u4e24\u4e2a\u573a\u666f\u6df7\u5728\u4e00\u8d77\u3002<\/p>\n\n\n\n
12 \u9898\uff1a\u53cc\u7b26\u53f7\u4f4d\u4e0b\u4e24\u4e2a\u6b63\u6570\u76f8\u52a0\u6ea2\u51fa\u7684\u7279\u5f81<\/h2>\n\n\n\n
\u53cc\u7b26\u53f7\u4f4d\u8865\u7801\u4e2d\uff1a<\/p>\n\n\n\n
00 \u8868\u793a\u6b63\u6570\n11 \u8868\u793a\u8d1f\u6570\n01 \u8868\u793a\u6b63\u6ea2\u51fa\n10 \u8868\u793a\u8d1f\u6ea2\u51fa\n<\/code><\/pre>\n\n\n\n
\u4e24\u4e2a\u6b63\u6570\u76f8\u52a0\uff0c\u5982\u679c\u53d1\u751f\u6ea2\u51fa\uff0c\u4e00\u5b9a\u662f\u7ed3\u679c\u592a\u5927\uff0c\u8d85\u8fc7\u6700\u5927\u6b63\u6570\u8303\u56f4\uff0c\u56e0\u6b64\u662f\u6b63\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u6b63\u6ea2\u51fa\u7684\u53cc\u7b26\u53f7\u4f4d\u7279\u5f81\u662f\uff1a<\/p>\n\n\n\n
01\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n
B. 01\n<\/code><\/pre>\n\n\n\n
13 \u9898\uff1a\u7528\u8fdb\u4f4d\u5224\u65ad\u52a0\u51cf\u6cd5\u6ea2\u51fa<\/h2>\n\n\n\n
\u9898\u76ee\u8bf4\uff1a<\/p>\n\n\n\n
\u7b26\u53f7\u4f4d\u7684\u8fdb\u4f4d\u4e3a C0\n\u6700\u9ad8\u4f4d\u7684\u8fdb\u4f4d\u4e3a C1\n<\/code><\/pre>\n\n\n\n
\u8fd9\u91cc\u7684\u8003\u70b9\u662f\u8865\u7801\u52a0\u51cf\u6cd5\u6ea2\u51fa\u7684\u8fdb\u4f4d\u5224\u65ad\u6cd5\u3002<\/p>\n\n\n\n
\u7ed3\u8bba\u662f\uff1a<\/p>\n\n\n\n
C0 \u548c C1 \u4e0d\u540c\uff0c\u5219\u6ea2\u51fa\uff1b\nC0 \u548c C1 \u76f8\u540c\uff0c\u5219\u4e0d\u6ea2\u51fa\u3002\n<\/code><\/pre>\n\n\n\n
\u4e5f\u5c31\u662f\uff1a<\/p>\n\n\n\n
C0 \u2295 C1 = 1 \u65f6\u6ea2\u51fa\n<\/code><\/pre>\n\n\n\n
\u5177\u4f53\u8bf4\uff1a<\/p>\n\n\n\n
C0 = 1\uff0cC1 = 0\uff0c\u6ea2\u51fa\nC0 = 0\uff0cC1 = 1\uff0c\u6ea2\u51fa\nC0 = 1\uff0cC1 = 1\uff0c\u4e0d\u6ea2\u51fa\nC0 = 0\uff0cC1 = 0\uff0c\u4e0d\u6ea2\u51fa\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u7b2c 13 \u9898\u4e0d\u80fd\u7b80\u5355\u7406\u89e3\u6210\u201c\u6709\u8fdb\u4f4d\u5c31\u6ea2\u51fa\u201d\u3002\u8865\u7801\u8fd0\u7b97\u4e2d\uff0c\u6700\u9ad8\u8fdb\u4f4d\u88ab\u4e22\u5f03\u662f\u6b63\u5e38\u73b0\u8c61\u3002\u771f\u6b63\u5224\u65ad\u6ea2\u51fa\u7684\u6807\u51c6\u662f\uff1a<\/p>\n\n\n\n
\u7b26\u53f7\u4f4d\u8fdb\u4f4d\u548c\u6700\u9ad8\u6570\u503c\u4f4d\u8fdb\u4f4d\u662f\u5426\u4e0d\u540c\u3002\n<\/code><\/pre>\n\n\n\n
\u56e0\u6b64\u672c\u9898\u7b54\u6848\u5e94\u8868\u8ff0\u4e3a\uff1a<\/p>\n\n\n\n
C0\u3001C1 \u4e00\u4e2a\u4ea7\u751f\u8fdb\u4f4d\uff0c\u4e00\u4e2a\u4e0d\u4ea7\u751f\u8fdb\u4f4d\u3002\n<\/code><\/pre>\n\n\n\n
\u4e5f\u5c31\u662f\u53ea\u6ee1\u8db3 I \u6216\u53ea\u6ee1\u8db3 II \u7684\u4e92\u65a5\u60c5\u51b5\uff1bIII \u548c IV \u90fd\u4e0d\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\u7b54\u6848\u6c47\u603b\uff1a<\/p>\n\n\n\n
\u9898\u53f7<\/th>\u7b54\u6848<\/th><\/tr><\/thead>
16<\/td>D\uff0c\u7ea6 100<\/code> \u4e2a\u5468\u671f<\/td><\/tr>
17<\/td>D\uff0cI\u3001II\u3001III \u90fd\u6b63\u786e<\/td><\/tr>
18<\/td>B\uff0c0100 0101, 1101 1001, 1<\/code><\/td><\/tr>
19<\/td>A\uff0c1, 1<\/code><\/td><\/tr>
20<\/td>C\uff0cDAH, 0<\/code><\/td><\/tr>
21<\/td>A\uff0c8CH, 1<\/code><\/td><\/tr>
22<\/td>A\uff0cCF, \u738b\u9053<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
16 \u9898\uff1a32 \u4f4d\u65e0\u7b26\u53f7\u6574\u6570\u4e58\u6cd5\u9700\u8981\u591a\u5c11\u5468\u671f<\/h2>\n\n\n\n
\u8fd9\u9898\u8003\u7684\u662f\u6700\u57fa\u672c\u7684\u201c\u79fb\u4f4d\u52a0\u6cd5\u4e58\u6cd5\u5668\u201d\u3002<\/p>\n\n\n\n
\u5bf9\u4e8e 32 \u4f4d\u65e0\u7b26\u53f7\u6570\u4e58\u6cd5\uff0c\u901a\u5e38\u8981\u5bf9\u4e58\u6570\u7684 32 \u4f4d\u9010\u4f4d\u5904\u7406\u3002\u6bcf\u4e00\u8f6e\u5927\u81f4\u5305\u62ec\uff1a<\/p>\n\n\n\n
\u5224\u65ad\u4e58\u6570\u6700\u4f4e\u4f4d\n\u9700\u8981\u65f6\u8fdb\u884c\u4e00\u6b21\u52a0\u6cd5\n\u88ab\u4e58\u6570\u5de6\u79fb\u4e00\u4f4d\n\u4e58\u6570\u53f3\u79fb\u4e00\u4f4d\n<\/code><\/pre>\n\n\n\n
\u9898\u76ee\u8bf4\u4e00\u6b21 ALU \u8fd0\u7b97\u548c\u4e00\u6b21\u79fb\u4f4d\u64cd\u4f5c\u5404\u9700\u8981 1 \u4e2a\u65f6\u949f\u5468\u671f\u3002\u6309\u7167\u57fa\u7840\u4e58\u6cd5\u5668\u6a21\u578b\uff0c\u6bcf\u8f6e\u7ea6\u9700\u8981\uff1a<\/p>\n\n\n\n
1 \u6b21 ALU \u8fd0\u7b97 + 2 \u6b21\u79fb\u4f4d\u64cd\u4f5c = 3 \u4e2a\u5468\u671f\n<\/code><\/pre>\n\n\n\n
\u4e00\u5171 32 \u8f6e\uff0c\u6240\u4ee5\uff1a<\/p>\n\n\n\n
32 \u00d7 3 = 96 \u4e2a\u5468\u671f\n<\/code><\/pre>\n\n\n\n
\u7531\u4e8e\u9898\u76ee\u95ee\u201c\u7ea6\u4e3a\u201d\uff0c\u6240\u4ee5\u9009\u6700\u63a5\u8fd1\u7684\uff1a<\/p>\n\n\n\n
D. 100\n<\/code><\/pre>\n\n\n\n
\u8fd9\u9898\u5bb9\u6613\u9519\u9009 64<\/code>\u3002\u5982\u679c\u6309\u201c\u6bcf\u8f6e\u4e00\u6b21\u52a0\u6cd5 + \u4e00\u6b21\u5408\u5e76\u79fb\u4f4d\u201d\u7406\u89e3\uff0c\u4f1a\u5f97\u5230 32 \u00d7 2 = 64<\/code>\u3002\u4f46\u672c\u9898\u9009\u9879\u4e2d\u540c\u65f6\u7ed9\u51fa 96<\/code> \u548c 100<\/code>\uff0c\u5e76\u4e14\u95ee\u201c\u7ea6\u4e3a\u201d\uff0c\u660e\u663e\u662f\u6309\u57fa\u7840\u79fb\u4f4d\u52a0\u6cd5\u4e58\u6cd5\u5668\u7684\u201c\u4e09\u6b65\u6cd5\u201d\u7406\u89e3\uff0c\u5373\u7ea6 100<\/code> \u4e2a\u5468\u671f\u3002<\/p>\n\n\n\n
17 \u9898\uff1a\u5173\u4e8e\u79fb\u4f4d\u8fd0\u7b97\u7684\u5224\u65ad<\/h2>\n\n\n\n
\u9898\u76ee\u5224\u65ad\u4e09\u4e2a\u8bf4\u6cd5\u3002<\/p>\n\n\n\n
I\uff1a\u8865\u7801\u7b97\u672f\u5de6\u79fb\u65f6\uff0c\u9ad8\u4f4d\u79fb\u51fa\uff0c\u4f4e\u4f4d\u8865 0\u3002\u82e5\u5de6\u79fb\u524d\u540e\u7684\u7b26\u53f7\u4f4d\u4e0d\u540c\uff0c\u5219\u53d1\u751f\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u8fd9\u4e2a\u8bf4\u6cd5\u6b63\u786e\u3002\u8865\u7801\u7b97\u672f\u5de6\u79fb\u672c\u8d28\u4e0a\u76f8\u5f53\u4e8e\u4e58\u4ee5 2\u3002\u5de6\u79fb\u540e\u5982\u679c\u7b26\u53f7\u4f4d\u53d1\u751f\u53d8\u5316\uff0c\u8bf4\u660e\u7ed3\u679c\u8d85\u51fa\u8865\u7801\u53ef\u8868\u793a\u8303\u56f4\uff0c\u53d1\u751f\u6ea2\u51fa\u3002<\/p>\n\n\n\n
II\uff1a\u65e0\u7b26\u53f7\u6570\u903b\u8f91\u5de6\u79fb\u65f6\uff0c\u82e5\u6700\u9ad8\u4f4d\u79fb\u51fa\u7684\u662f 1\uff0c\u5219\u53d1\u751f\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u8fd9\u4e2a\u8bf4\u6cd5\u4e5f\u6b63\u786e\u3002\u65e0\u7b26\u53f7\u6570\u5de6\u79fb\u76f8\u5f53\u4e8e\u4e58\u4ee5 2\uff0c\u5982\u679c\u6700\u9ad8\u4f4d\u79fb\u51fa\u7684\u662f 1\uff0c\u8bf4\u660e\u539f\u6765\u7684\u9ad8\u4f4d\u6709\u6548\u4fe1\u606f\u88ab\u4e22\u5931\uff0c\u7ed3\u679c\u8d85\u8fc7\u673a\u5668\u5b57\u957f\u53ef\u8868\u793a\u8303\u56f4\u3002<\/p>\n\n\n\n
III\uff1a\u903b\u8f91\u5de6\u79fb\u548c\u8865\u7801\u7b97\u672f\u5de6\u79fb\u7684\u7ed3\u679c\u90fd\u4e00\u6837\uff0c\u90fd\u662f\u79fb\u51fa\u6700\u9ad8\u4f4d\uff0c\u5e76\u5728\u4f4e\u4f4d\u8865 0\u3002<\/p>\n\n\n\n
\u8fd9\u4e2a\u8bf4\u6cd5\u4e5f\u6b63\u786e\u3002\u6ce8\u610f\u8fd9\u91cc\u8bf4\u7684\u662f\u201c\u79fb\u4f4d\u540e\u7684\u4f4d\u5f62\u7ed3\u679c\u4e00\u6837\u201d\u3002\u903b\u8f91\u5de6\u79fb\u548c\u8865\u7801\u7b97\u672f\u5de6\u79fb\u5728\u64cd\u4f5c\u5f62\u5f0f\u4e0a\u90fd\u662f\uff1a<\/p>\n\n\n\n
\u9ad8\u4f4d\u79fb\u51fa\uff0c\u4f4e\u4f4d\u8865 0\n<\/code><\/pre>\n\n\n\n
\u533a\u522b\u4e3b\u8981\u5728\u4e8e\u89e3\u91ca\u65b9\u5f0f\u548c\u6ea2\u51fa\u5224\u65ad\uff0c\u800c\u4e0d\u662f\u4f4d\u79fb\u64cd\u4f5c\u672c\u8eab\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n
D. I\u3001II\u3001III\n<\/code><\/pre>\n\n\n\n
18 \u9898\uff1a\u7528 8 \u4f4d\u52a0\u6cd5\u5668\u8ba1\u7b97\u65e0\u7b26\u53f7\u6570 x – y<\/h2>\n\n\n\n
\u9898\u76ee\u7ed9\u51fa\uff1a<\/p>\n\n\n\n
x = 69\ny = 38\n<\/code><\/pre>\n\n\n\n
\u8981\u6c42\u5728 8 \u4f4d\u52a0\u6cd5\u5668\u4e2d\u8ba1\u7b97 x - y<\/code>\uff0c\u95ee\u4e24\u4e2a\u8f93\u5165\u7aef\u4fe1\u606f\u548c\u4f4e\u4f4d\u8fdb\u4f4d\u4fe1\u606f\u5206\u522b\u662f\u4ec0\u4e48\u3002<\/p>\n\n\n\n
\u5148\u628a x\u3001y \u8f6c\u6210 8 \u4f4d\u4e8c\u8fdb\u5236\uff1a<\/p>\n\n\n\n
x = 69 = 0100 0101\ny = 38 = 0010 0110\n<\/code><\/pre>\n\n\n\n
\u52a0\u6cd5\u5668\u672c\u8eab\u53ea\u4f1a\u505a\u52a0\u6cd5\uff0c\u8981\u5b9e\u73b0\u51cf\u6cd5\uff0c\u4e00\u822c\u7528\uff1a<\/p>\n\n\n\n
x - y = x + y \u7684\u6309\u4f4d\u53d6\u53cd + 1\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u7b2c\u4e8c\u4e2a\u8f93\u5165\u7aef\u4e0d\u662f\u76f4\u63a5\u8f93\u5165 y<\/code>\uff0c\u800c\u662f\u8f93\u5165 y<\/code> \u7684\u6309\u4f4d\u53d6\u53cd\uff1a<\/p>\n\n\n\n
y        = 0010 0110\n\u6309\u4f4d\u53d6\u53cd = 1101 1001\n<\/code><\/pre>\n\n\n\n
\u4f4e\u4f4d\u8fdb\u4f4d\u8f93\u5165\u4e3a 1<\/code>\uff0c\u7528\u6765\u5b8c\u6210\u201c\u52a0 1\u201d\u3002<\/p>\n\n\n\n
\u56e0\u6b64\u52a0\u6cd5\u5668\u8f93\u5165\u5e94\u4e3a\uff1a<\/p>\n\n\n\n
\u7b2c\u4e00\u4e2a\u8f93\u5165\u7aef\uff1a0100 0101\n\u7b2c\u4e8c\u4e2a\u8f93\u5165\u7aef\uff1a1101 1001\n\u4f4e\u4f4d\u8fdb\u4f4d\uff1a1\n<\/code><\/pre>\n\n\n\n
\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n
B. 0100 0101, 1101 1001, 1\n<\/code><\/pre>\n\n\n\n
\u8fd9\u91cc\u5bb9\u6613\u9519\u9009 1101 1010, 0<\/code>\u3002\u56e0\u4e3a 1101 1010<\/code> \u662f -y<\/code> \u7684\u8865\u7801\u5f62\u5f0f\uff0c\u548c \u6309\u4f4d\u53d6\u53cd + 1<\/code> \u7684\u7ed3\u679c\u4e00\u6837\u3002\u4f46\u9898\u76ee\u95ee\u7684\u662f\u201c\u52a0\u6cd5\u5668\u7684\u4e24\u4e2a\u8f93\u5165\u7aef\u4fe1\u606f\u548c\u8f93\u5165\u7684\u4f4e\u4f4d\u8fdb\u4f4d\u4fe1\u606f\u201d\uff0c\u6807\u51c6\u51cf\u6cd5\u5668\u7ed3\u6784\u662f\u7b2c\u4e8c\u8f93\u5165\u7aef\u53d6\u53cd\uff0c\u4f4e\u4f4d\u8fdb\u4f4d\u7f6e 1\uff0c\u6240\u4ee5\u5e94\u9009 B\u3002<\/p>\n\n\n\n
19 \u9898\uff1a\u8865\u7801\u8868\u793a\u4e0b\u8ba1\u7b97 x – y \u7684\u4f4e\u4f4d\u8fdb\u4f4d\u548c OF<\/h2>\n\n\n\n
\u9898\u76ee\u7ed9\u51fa\uff1a<\/p>\n\n\n\n
[x]\u8865 = F5H\n[y]\u8865 = 7EH\n<\/code><\/pre>\n\n\n\n
\u5148\u628a\u5b83\u4eec\u8f6c\u6210\u771f\u503c\u3002<\/p>\n\n\n\n
F5H<\/code> \u662f 8 \u4f4d\u8865\u7801\uff0c\u6700\u9ad8\u4f4d\u4e3a 1\uff0c\u662f\u8d1f\u6570\uff1a<\/p>\n\n\n\n
F5H = 245\n245 - 256 = -11\n\n\u6240\u4ee5 x = -11\n<\/code><\/pre>\n\n\n\n
7EH<\/code> \u6700\u9ad8\u4f4d\u4e3a 0\uff0c\u662f\u6b63\u6570\uff1a<\/p>\n\n\n\n
7EH = 126\n\n\u6240\u4ee5 y = 126\n<\/code><\/pre>\n\n\n\n
\u8ba1\u7b97\uff1a<\/p>\n\n\n\n
x - y = -11 - 126 = -137\n<\/code><\/pre>\n\n\n\n
8 \u4f4d\u8865\u7801\u7684\u8868\u793a\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n
-128 ~ +127\n<\/code><\/pre>\n\n\n\n
-137<\/code> \u5c0f\u4e8e -128<\/code>\uff0c\u6240\u4ee5\u53d1\u751f\u6ea2\u51fa\uff0cOF = 1<\/code>\u3002<\/p>\n\n\n\n
\u518d\u770b\u4f4e\u4f4d\u8fdb\u4f4d\u8f93\u5165\u3002\u52a0\u6cd5\u5668\u8ba1\u7b97\u51cf\u6cd5\u65f6\uff1a<\/p>\n\n\n\n
x - y = x + y \u7684\u6309\u4f4d\u53d6\u53cd + 1\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u4f4e\u4f4d\u8fdb\u4f4d\u8f93\u5165\u4e3a\uff1a<\/p>\n\n\n\n
1\n<\/code><\/pre>\n\n\n\n
\u56e0\u6b64\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n
A. 1, 1\n<\/code><\/pre>\n\n\n\n
\u7528\u673a\u5668\u6570\u9a8c\u8bc1\u4e00\u4e0b\uff1a<\/p>\n\n\n\n
x      = F5H = 1111 0101\ny      = 7EH = 0111 1110\n~y     = 81H = 1000 0001\nCin    = 1\n\nF5H + 81H + 1 = 177H\n\u53d6\u4f4e 8 \u4f4d = 77H\n<\/code><\/pre>\n\n\n\n
77H<\/code> \u662f\u6b63\u6570\uff0c\u4f46\u771f\u5b9e\u7ed3\u679c\u5e94\u662f\u8d1f\u6570 -137<\/code>\uff0c\u7b26\u53f7\u9519\u8bef\uff0c\u8bf4\u660e\u786e\u5b9e\u6ea2\u51fa\u3002<\/p>\n\n\n\n
20 \u9898\uff1a\u8ba1\u7b97 x\/2 + 2y \u7684\u673a\u5668\u6570\u548c OF<\/h2>\n\n\n\n
\u9898\u76ee\u7ed9\u51fa\uff1a<\/p>\n\n\n\n
[x]\u8865 = 44H\n[y]\u8865 = DCH\n<\/code><\/pre>\n\n\n\n
\u5148\u6c42\u771f\u503c\u3002<\/p>\n\n\n\n
44H = 0100 0100 = 68\n<\/code><\/pre>\n\n\n\n
DCH<\/code> \u6700\u9ad8\u4f4d\u4e3a 1\uff0c\u662f\u8d1f\u6570\uff1a<\/p>\n\n\n\n
DCH = 220\n220 - 256 = -36\n\n\u6240\u4ee5 y = -36\n<\/code><\/pre>\n\n\n\n
\u8ba1\u7b97\u8868\u8fbe\u5f0f\uff1a<\/p>\n\n\n\n
x\/2 + 2y\n= 68\/2 + 2 \u00d7 (-36)\n= 34 - 72\n= -38\n<\/code><\/pre>\n\n\n\n
-38<\/code> \u5728 8 \u4f4d\u8865\u7801\u8303\u56f4 -128 ~ +127<\/code> \u5185\uff0c\u6240\u4ee5\uff1a<\/p>\n\n\n\n
OF = 0\n<\/code><\/pre>\n\n\n\n
\u518d\u628a -38<\/code> \u8f6c\u4e3a 8 \u4f4d\u8865\u7801\uff1a<\/p>\n\n\n\n
38 = 0010 0110\n-38 \u7684\u8865\u7801 = 1101 1010 = DAH\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n
C. DAH, 0\n<\/code><\/pre>\n\n\n\n
\u4e5f\u53ef\u4ee5\u76f4\u63a5\u7528\u79fb\u4f4d\u505a\uff1a<\/p>\n\n\n\n
x = 44H = 0100 0100\nx\/2\uff1a\u7b97\u672f\u53f3\u79fb\u4e00\u4f4d -> 0010 0010 = 22H\n\ny = DCH = 1101 1100\n2y\uff1a\u7b97\u672f\u5de6\u79fb\u4e00\u4f4d -> 1011 1000 = B8H\n\n22H + B8H = DAH\n<\/code><\/pre>\n\n\n\n
\u7ed3\u679c\u4e3a DAH<\/code>\uff0c\u4e14\u6ca1\u6709\u6ea2\u51fa\u3002<\/p>\n\n\n\n
21 \u9898\uff1a\u8ba1\u7b97 x – 2y \u7684\u673a\u5668\u6570\u548c OF<\/h2>\n\n\n\n
\u9898\u76ee\u4ecd\u7136\u662f\uff1a<\/p>\n\n\n\n
[x]\u8865 = 44H\n[y]\u8865 = DCH\n<\/code><\/pre>\n\n\n\n
\u7531\u4e0a\u4e00\u9898\u53ef\u77e5\uff1a<\/p>\n\n\n\n
x = 68\ny = -36\n2y = -72\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
x - 2y\n= 68 - (-72)\n= 140\n<\/code><\/pre>\n\n\n\n
\u4f46\u662f 8 \u4f4d\u8865\u7801\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n
-128 ~ +127\n<\/code><\/pre>\n\n\n\n
140<\/code> \u8d85\u8fc7\u6700\u5927\u6b63\u6570 127<\/code>\uff0c\u6240\u4ee5\u53d1\u751f\u6b63\u6ea2\u51fa\uff1a<\/p>\n\n\n\n
OF = 1\n<\/code><\/pre>\n\n\n\n
\u518d\u770b\u673a\u5668\u7ed3\u679c\u3002\u5148\u6c42 2y<\/code>\uff1a<\/p>\n\n\n\n
y = DCH = 1101 1100\n2y = \u7b97\u672f\u5de6\u79fb\u4e00\u4f4d = 1011 1000 = B8H\n<\/code><\/pre>\n\n\n\n
\u8ba1\u7b97\uff1a<\/p>\n\n\n\n
x - 2y = 44H - B8H\n<\/code><\/pre>\n\n\n\n
\u7528\u52a0\u6cd5\u5668\u5b9e\u73b0\u51cf\u6cd5\uff1a<\/p>\n\n\n\n
44H - B8H = 44H + (~B8H) + 1\n<\/code><\/pre>\n\n\n\n
B8H = 1011 1000\n~B8H = 0100 0111 = 47H\n\n44H + 47H + 1 = 8CH\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u673a\u5668\u7ed3\u679c\u662f\uff1a<\/p>\n\n\n\n
8CH\n<\/code><\/pre>\n\n\n\n
\u4f46 8CH<\/code> \u6700\u9ad8\u4f4d\u4e3a 1\uff0c\u6309\u8865\u7801\u89e3\u91ca\u662f\u8d1f\u6570\uff0c\u8fd9\u548c\u771f\u5b9e\u6570\u5b66\u7ed3\u679c +140<\/code> \u4e0d\u4e00\u81f4\uff0c\u8bf4\u660e\u53d1\u751f\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n
A. 8CH, 1\n<\/code><\/pre>\n\n\n\n
22 \u9898\uff1aC \u8bed\u8a00\u4ee3\u7801\u4e2d\u7684\u6bd4\u8f83\u4f7f\u7528\u54ea\u4e2a\u6807\u5fd7\u4f4d\uff0c\u8f93\u51fa\u4ec0\u4e48<\/h2>\n\n\n\n
\u4ee3\u7801\u662f\uff1a<\/p>\n\n\n\n
int si = 65536;\nshort i = si;\nunsigned j = 0;\n\nif (i <= j - 1)\n    printf(\"\u738b\u9053\");\nelse\n    printf(\"\u8ba1\u7b97\u673a\u6559\u80b2\");\n<\/code><\/pre>\n\n\n\n
\u5148\u770b\u8d4b\u503c\uff1a<\/p>\n\n\n\n
si = 65536\n<\/code><\/pre>\n\n\n\n
short<\/code> \u901a\u5e38\u662f 16 \u4f4d\u300265536<\/code> \u7684\u5341\u516d\u8fdb\u5236\u662f\uff1a<\/p>\n\n\n\n
65536 = 0x00010000\n<\/code><\/pre>\n\n\n\n
\u8d4b\u7ed9 16 \u4f4d short i<\/code> \u65f6\uff0c\u4f4e 16 \u4f4d\u4e3a\uff1a<\/p>\n\n\n\n
0000H\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
i = 0\n<\/code><\/pre>\n\n\n\n
\u518d\u770b\uff1a<\/p>\n\n\n\n
unsigned j = 0;\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
j = 0\n<\/code><\/pre>\n\n\n\n
\u4f46\u662f\u8868\u8fbe\u5f0f\u4e2d\u662f\uff1a<\/p>\n\n\n\n
i <= j - 1\n<\/code><\/pre>\n\n\n\n
\u7531\u4e8e j<\/code> \u662f unsigned<\/code>\uff0c\u6240\u4ee5 j - 1<\/code> \u6309\u65e0\u7b26\u53f7\u6570\u8fd0\u7b97\uff1a<\/p>\n\n\n\n
0 - 1 = 0xFFFFFFFF\n<\/code><\/pre>\n\n\n\n
\u4e5f\u5c31\u662f\u65e0\u7b26\u53f7\u6574\u6570\u7684\u6700\u5927\u503c\u3002<\/p>\n\n\n\n
\u540c\u65f6\uff0ci<\/code> \u4f1a\u88ab\u8f6c\u6362\u6210\u65e0\u7b26\u53f7\u6570\u53c2\u4e0e\u6bd4\u8f83\uff1a<\/p>\n\n\n\n
i = 0\nj - 1 = 0xFFFFFFFF\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u5224\u65ad\u6761\u4ef6\u4e3a\u771f\uff1a<\/p>\n\n\n\n
0 <= 0xFFFFFFFF\n<\/code><\/pre>\n\n\n\n
\u6700\u7ec8\u8f93\u51fa\uff1a<\/p>\n\n\n\n
\u738b\u9053\n<\/code><\/pre>\n\n\n\n
\u56e0\u4e3a\u8fd9\u662f\u65e0\u7b26\u53f7\u6570\u6bd4\u8f83\uff0c\u6240\u4ee5\u5206\u652f\u5224\u65ad\u4e3b\u8981\u4f9d\u636e\u65e0\u7b26\u53f7\u6bd4\u8f83\u76f8\u5173\u7684\u6807\u5fd7\u4f4d\uff0c\u4e5f\u5c31\u662f CF<\/code>\uff0c\u800c\u4e0d\u662f\u6709\u7b26\u53f7\u6ea2\u51fa\u6807\u5fd7 OF<\/code>\u3002<\/p>\n\n\n\n
\u7b54\u6848\u662f\uff1a<\/p>\n\n\n\n
A. CF, \u738b\u9053\n<\/code><\/pre>\n\n\n\n
\u8fd9\u9898\u7684\u5173\u952e\u9677\u9631\u6709\u4e24\u4e2a\uff1a\u7b2c\u4e00\uff0cshort i = 65536<\/code> \u540e i<\/code> \u53d8\u6210 0\uff1b\u7b2c\u4e8c\uff0cj<\/code> \u662f unsigned<\/code>\uff0c\u6240\u4ee5 j - 1<\/code> \u4e0d\u662f -1<\/code>\uff0c\u800c\u662f\u65e0\u7b26\u53f7\u6700\u5927\u503c\u3002<\/p>\n\n\n\n
\n\n\n\n
\u5728\u8ba1\u7b97\u8865\u7801\u548c\u53cd\u7801\u7684\u6570\u5b57\u4e4b\u548c\u4e2d\uff0c\u6211\u4eec\u662f\u4e0d\u662f\u8981\u628a\u5b83\u7ed9\u8fdb\u884c\u5316\u7b80\u5230\u771f\u6570\u624d\u6bd4\u8f83\u65b9\u4fbf\u8ba1\u6570\uff0c\u5bf9\u5427\uff1f\u6211\u4eec\u5728\u5224\u65ad\u662f\u5426\u6ea2\u51fa\u7684\u65f6\u5019\uff0c\u4e5f\u53ef\u4ee5\u5229\u7528\u7b97\u51fa\u6765\u4e4b\u540e\u7684\u6570\u503c\u6765\u4e0e\u8303\u56f4\u8fdb\u884c\u6bd4\u8f83\uff0c\u4e5f\u53ef\u4ee5\u5229\u7528\uff0c\u4e8c\u8fdb\u5236\u6c42\u548c\u4e4b\u540e\u9996\u4f4d\u6765\u8fdb\u884c\u5224\u65ad\u3002\u5728\u7b2c22\u9898\u91cc\u9762\uff0c\u5b83\u8fd9\u91cc\u9762\u6d89\u53ca\u5230\u4e86\u5927\u91cf\u7684\u6570\u636e\u7c7b\u578b\u8f6c\u6362\uff0c\u4e0d\u540c\u6570\u636e\u7c7b\u578b\u8fdb\u884c\u6bd4\u8f83\uff0c\u9075\u5faa\u7684\u662f\u4ec0\u4e48\u89c4\u5219\uff1f<\/p>\n\n\n\n
\u5bf9\uff0c\u53ef\u4ee5\u628a\u601d\u8def\u5206\u6210\u4e24\u5c42\uff1a\u4e00\u5c42\u662f\u201c\u4e3a\u4e86\u7b97\u9898\u65b9\u4fbf\uff0c\u628a\u673a\u5668\u6570\u5148\u8bd1\u6210\u771f\u503c\u201d\uff1b\u53e6\u4e00\u5c42\u662f\u201c\u771f\u6b63\u7684\u673a\u5668\u8fd0\u7b97\uff0c\u672c\u8d28\u4e0a\u4ecd\u7136\u662f\u6309\u4e8c\u8fdb\u5236\u4f4d\u6c42\u548c\u3001\u53d6\u53cd\u3001\u52a0 1\u3001\u79fb\u4f4d\u201d\u3002\u8003\u7814\u505a\u9898\u65f6\uff0c\u4e24\u79cd\u65b9\u6cd5\u90fd\u8981\u4f1a\uff0c\u4f46\u4f7f\u7528\u573a\u666f\u4e0d\u540c\u3002<\/p>\n\n\n\n
\u4e00\u3001\u8865\u7801\u3001\u53cd\u7801\u505a\u52a0\u6cd5\u65f6\uff0c\u8981\u4e0d\u8981\u5148\u8f6c\u6210\u771f\u503c\uff1f<\/h2>\n\n\n\n
\u5982\u679c\u9898\u76ee\u53ea\u662f\u95ee\u201c\u8fd9\u4e2a\u8fd0\u7b97\u662f\u5426\u6ea2\u51fa\u201d\u201c\u7ed3\u679c\u771f\u503c\u662f\u591a\u5c11\u201d\uff0c\u5148\u628a\u8865\u7801\u3001\u53cd\u7801\u8bd1\u6210\u771f\u503c\u901a\u5e38\u66f4\u76f4\u89c2\u3002<\/p>\n\n\n\n
\u4f8b\u5982 8 \u4f4d\u8865\u7801\uff1a<\/p>\n\n\n\n
F5H = 1111 0101\n\u6700\u9ad8\u4f4d\u662f 1\uff0c\u8bf4\u660e\u662f\u8d1f\u6570\n\u771f\u503c = 245 - 256 = -11\n<\/code><\/pre>\n\n\n\n
\u8fd9\u79cd\u65b9\u6cd5\u5f88\u9002\u5408\u5feb\u901f\u5224\u65ad\uff1a<\/p>\n\n\n\n
x = -11\ny = 126\nx - y = -137\n<\/code><\/pre>\n\n\n\n
\u800c 8 \u4f4d\u8865\u7801\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n
-128 ~ +127\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5 -137<\/code> \u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u4f46\u662f\uff0c\u5982\u679c\u9898\u76ee\u95ee\u7684\u662f\u201c\u673a\u5668\u7ed3\u679c\u662f\u4ec0\u4e48\u201d\u201c\u52a0\u6cd5\u5668\u8f93\u5165\u7aef\u662f\u4ec0\u4e48\u201d\u201cOF\u3001CF \u662f\u591a\u5c11\u201d\uff0c\u5c31\u4e0d\u80fd\u53ea\u505c\u7559\u5728\u771f\u503c\u5c42\u9762\uff0c\u8fd8\u8981\u56de\u5230\u673a\u5668\u6570\u6309\u4f4d\u8fd0\u7b97\u3002<\/p>\n\n\n\n
\u6bd4\u5982\u8ba1\u7b97\u8865\u7801\u51cf\u6cd5\uff1a<\/p>\n\n\n\n
x - y = x + (-y)\n<\/code><\/pre>\n\n\n\n
\u5728\u52a0\u6cd5\u5668\u4e2d\u901a\u5e38\u5b9e\u73b0\u4e3a\uff1a<\/p>\n\n\n\n
x + \u6309\u4f4d\u53d6\u53cd(y) + 1\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u9898\u76ee\u95ee\u52a0\u6cd5\u5668\u7684\u8f93\u5165\u7aef\u65f6\uff0c\u7b54\u6848\u4e0d\u662f\u76f4\u63a5\u8f93\u5165 -y<\/code> \u7684\u771f\u503c\uff0c\u800c\u662f\u8f93\u5165 y<\/code> \u7684\u6309\u4f4d\u53d6\u53cd\uff0c\u5e76\u4e14\u4f4e\u4f4d\u8fdb\u4f4d Cin = 1<\/code>\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u53ef\u4ee5\u8fd9\u6837\u8bb0\uff1a<\/p>\n\n\n\n
\u5224\u65ad\u6570\u503c\u5927\u5c0f\u3001\u662f\u5426\u8d85\u8303\u56f4\uff1a\u8f6c\u771f\u503c\u6700\u65b9\u4fbf\uff1b\n\u6c42\u673a\u5668\u7ed3\u679c\u3001\u6807\u5fd7\u4f4d\u3001\u52a0\u6cd5\u5668\u8f93\u5165\uff1a\u5fc5\u987b\u770b\u4e8c\u8fdb\u5236\u4f4d\u8fd0\u7b97\u3002\n<\/code><\/pre>\n\n\n\n
\u4e8c\u3001\u8865\u7801\u52a0\u6cd5\u6ea2\u51fa\uff0c\u4e0d\u80fd\u53ea\u770b\u7ed3\u679c\u6700\u9ad8\u4f4d<\/h2>\n\n\n\n
\u4f60\u8bf4\u201c\u53ef\u4ee5\u5229\u7528\u4e8c\u8fdb\u5236\u6c42\u548c\u4e4b\u540e\u9996\u4f4d\u6765\u5224\u65ad\u201d\uff0c\u8fd9\u91cc\u8981\u7a0d\u5fae\u4fee\u6b63\u4e00\u4e0b\uff1a\u53ea\u770b\u7ed3\u679c\u6700\u9ad8\u4f4d\u662f\u4e0d\u591f\u7684<\/strong>\u3002<\/p>\n\n\n\n
\u8865\u7801\u52a0\u6cd5\u6ea2\u51fa\u7684\u5224\u65ad\uff0c\u5e38\u7528\u4e24\u79cd\u65b9\u6cd5\u3002<\/p>\n\n\n\n
\u7b2c\u4e00\u79cd\uff0c\u771f\u503c\u8303\u56f4\u5224\u65ad\u6cd5\uff1a<\/p>\n\n\n\n
n \u4f4d\u8865\u7801\u8303\u56f4\uff1a-2<sup>n-1<\/sup> ~ 2<sup>n-1<\/sup> - 1\n<\/code><\/pre>\n\n\n\n
\u4f8b\u5982 8 \u4f4d\u8865\u7801\u8303\u56f4\uff1a<\/p>\n\n\n\n
-128 ~ +127\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u6570\u5b66\u771f\u503c\u7ed3\u679c\u8d85\u51fa\u8fd9\u4e2a\u8303\u56f4\uff0c\u5c31\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u7b2c\u4e8c\u79cd\uff0c\u7b26\u53f7\u4f4d\u5224\u65ad\u6cd5\uff1a<\/p>\n\n\n\n
\u540c\u53f7\u76f8\u52a0\uff0c\u7ed3\u679c\u53d8\u53f7\uff0c\u5219\u6ea2\u51fa\uff1b\n\u5f02\u53f7\u76f8\u52a0\uff0c\u4e00\u5b9a\u4e0d\u6ea2\u51fa\u3002\n<\/code><\/pre>\n\n\n\n
\u5177\u4f53\u6765\u8bf4\uff1a<\/p>\n\n\n\n
\u6b63\u6570 + \u6b63\u6570 = \u8d1f\u6570\uff0c\u6b63\u6ea2\u51fa\n\u8d1f\u6570 + \u8d1f\u6570 = \u6b63\u6570\uff0c\u8d1f\u6ea2\u51fa\n\u6b63\u6570 + \u8d1f\u6570\uff0c\u4e0d\u6ea2\u51fa\n\u8d1f\u6570 + \u6b63\u6570\uff0c\u4e0d\u6ea2\u51fa\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u4e0d\u80fd\u53ea\u770b\u201c\u7ed3\u679c\u6700\u9ad8\u4f4d\u662f 0 \u8fd8\u662f 1\u201d\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n
0100 0000 + 1100 0000 = 0000 0000\n<\/code><\/pre>\n\n\n\n
\u4e00\u4e2a\u6b63\u6570\u52a0\u4e00\u4e2a\u8d1f\u6570\uff0c\u7ed3\u679c\u6700\u9ad8\u4f4d\u662f 0<\/code>\uff0c\u4f46\u8fd9\u4e0d\u4ee3\u8868\u53d1\u751f\u4e86\u6ea2\u51fa\u3002\u56e0\u4e3a\u5f02\u53f7\u76f8\u52a0\u672c\u6765\u5c31\u4e0d\u4f1a\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u7b2c\u4e09\u79cd\uff0c\u8fdb\u4f4d\u5224\u65ad\u6cd5\uff1a<\/p>\n\n\n\n
\u7b26\u53f7\u4f4d\u7684\u8fdb\u4f4d C0\n\u6700\u9ad8\u6570\u503c\u4f4d\u5411\u7b26\u53f7\u4f4d\u7684\u8fdb\u4f4d C1\n\u82e5 C0 \u2260 C1\uff0c\u5219\u6ea2\u51fa\uff1b\n\u82e5 C0 = C1\uff0c\u5219\u4e0d\u6ea2\u51fa\u3002\n<\/code><\/pre>\n\n\n\n
\u4e5f\u5c31\u662f\uff1a<\/p>\n\n\n\n
OF = C0 \u2295 C1\n<\/code><\/pre>\n\n\n\n
\u8fd9\u4e5f\u662f\u786c\u4ef6\u4e2d\u5f88\u5e38\u89c1\u7684\u6ea2\u51fa\u5224\u65ad\u65b9\u6cd5\u3002<\/p>\n\n\n\n
\u4e09\u3001\u53cd\u7801\u52a0\u6cd5\u548c\u8865\u7801\u52a0\u6cd5\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/h2>\n\n\n\n
\u8865\u7801\u52a0\u6cd5\u6700\u7b80\u5355\uff1a<\/p>\n\n\n\n
\u76f4\u63a5\u6309\u4e8c\u8fdb\u5236\u76f8\u52a0\uff0c\u6700\u9ad8\u4f4d\u8fdb\u4f4d\u4e22\u5f03\u3002\n<\/code><\/pre>\n\n\n\n
\u4f8b\u5982 8 \u4f4d\u8865\u7801\u76f8\u52a0\uff0c\u5982\u679c\u4ea7\u751f\u7b2c 9 \u4f4d\u8fdb\u4f4d\uff0c\u76f4\u63a5\u820d\u5f03\u5373\u53ef\u3002<\/p>\n\n\n\n
\u4f46\u53cd\u7801\u52a0\u6cd5\u4e0d\u540c\u3002\u53cd\u7801\u52a0\u6cd5\u6709\u4e00\u4e2a\u7279\u6b8a\u89c4\u5219\uff1a<\/p>\n\n\n\n
\u6700\u9ad8\u4f4d\u4ea7\u751f\u7684\u8fdb\u4f4d\uff0c\u8981\u5faa\u73af\u52a0\u5230\u6700\u4f4e\u4f4d\u3002\n<\/code><\/pre>\n\n\n\n
\u8fd9\u53eb\u201c\u5faa\u73af\u8fdb\u4f4d\u201d\u6216\u8005\u201c\u56de\u5377\u8fdb\u4f4d\u201d\u3002<\/p>\n\n\n\n
\u4f8b\u5982\u53cd\u7801\u8fd0\u7b97\u4e2d\uff0c\u5982\u679c\u4e24\u4e2a 8 \u4f4d\u53cd\u7801\u76f8\u52a0\u5f97\u5230\uff1a<\/p>\n\n\n\n
1 0010 1010\n<\/code><\/pre>\n\n\n\n
\u524d\u9762\u7684\u6700\u9ad8\u8fdb\u4f4d 1<\/code> \u4e0d\u80fd\u76f4\u63a5\u4e22\u6389\uff0c\u800c\u662f\u8981\u52a0\u56de\u6700\u4f4e\u4f4d\uff1a<\/p>\n\n\n\n
0010 1010\n+      1\n---------\n0010 1011\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u53cd\u7801\u52a0\u6cd5\u9898\u8981\u7279\u522b\u6ce8\u610f\uff1a\u8865\u7801\u6700\u9ad8\u8fdb\u4f4d\u4e22\u5f03\uff0c\u53cd\u7801\u6700\u9ad8\u8fdb\u4f4d\u5faa\u73af\u52a0\u56de\u6700\u4f4e\u4f4d<\/strong>\u3002<\/p>\n\n\n\n
\u4e0d\u8fc7\u73b0\u5728 408 \u4e2d\u4e3b\u8981\u8003\u8865\u7801\uff0c\u53cd\u7801\u66f4\u591a\u7528\u4e8e\u7406\u89e3\u673a\u5668\u6570\u8868\u793a\u548c\u8f6c\u6362\u3002\u771f\u6b63\u505a\u52a0\u51cf\u6cd5\u3001\u5224\u65ad\u6ea2\u51fa\u65f6\uff0c\u8865\u7801\u662f\u91cd\u70b9\u3002<\/p>\n\n\n\n
\u56db\u3001\u7b2c 22 \u9898\u6d89\u53ca\u7684 C \u8bed\u8a00\u7c7b\u578b\u8f6c\u6362\u89c4\u5219<\/h2>\n\n\n\n
\u7b2c 22 \u9898\u7684\u6838\u5fc3\u4e0d\u662f\u673a\u5668\u6570\u52a0\u51cf\uff0c\u800c\u662f C \u8bed\u8a00\u7684\u201c\u6574\u578b\u63d0\u5347\u201d\u548c\u201c\u901a\u5e38\u7b97\u672f\u8f6c\u6362\u201d\u3002<\/p>\n\n\n\n
\u4ee3\u7801\u5927\u81f4\u662f\uff1a<\/p>\n\n\n\n
int si = 65536;\nshort i = si;\nunsigned j = 0;\n\nif (i <= j - 1)\n    printf(\"\u738b\u9053\");\nelse\n    printf(\"\u8ba1\u7b97\u673a\u6559\u80b2\");\n<\/code><\/pre>\n\n\n\n
\u8fd9\u91cc\u6709\u4e09\u5c42\u8f6c\u6362\u3002<\/p>\n\n\n\n
1. \u8d4b\u503c\u7ed9 short \u65f6\u53d1\u751f\u622a\u65ad<\/h3>\n\n\n\n
\u5047\u8bbe\u5e38\u89c1\u8003\u7814\u73af\u5883\uff1a<\/p>\n\n\n\n
int      32 \u4f4d\nshort    16 \u4f4d\nunsigned 32 \u4f4d\n<\/code><\/pre>\n\n\n\n
si = 65536<\/code>\uff0c\u4e5f\u5c31\u662f\uff1a<\/p>\n\n\n\n
65536 = 0x00010000\n<\/code><\/pre>\n\n\n\n
\u8d4b\u7ed9 16 \u4f4d short i<\/code> \u65f6\uff0c\u53ea\u4fdd\u7559\u4f4e 16 \u4f4d\uff1a<\/p>\n\n\n\n
0x00010000 \u7684\u4f4e 16 \u4f4d = 0x0000\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
i = 0\n<\/code><\/pre>\n\n\n\n
\u4e25\u683c\u6309 C \u6807\u51c6\uff0c\u8d85\u51fa short<\/code> \u8868\u793a\u8303\u56f4\u7684\u8d4b\u503c\u7ed3\u679c\u4e0e\u5177\u4f53\u5b9e\u73b0\u6709\u5173\uff1b\u4f46\u5728 408 \u548c\u5e38\u89c1\u673a\u5668\u9898\u4e2d\uff0c\u4e00\u822c\u6309\u201c\u622a\u53d6\u4f4e\u4f4d\u201d\u5904\u7406\u3002<\/p>\n\n\n\n
2. j - 1<\/code> \u4e2d\uff0c1 \u4f1a\u8f6c\u6362\u6210 unsigned<\/h3>\n\n\n\n
\u56e0\u4e3a\uff1a<\/p>\n\n\n\n
unsigned j = 0;\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u8868\u8fbe\u5f0f\uff1a<\/p>\n\n\n\n
j - 1\n<\/code><\/pre>\n\n\n\n
\u4e0d\u662f\u6709\u7b26\u53f7\u8fd0\u7b97\uff0c\u800c\u662f\u65e0\u7b26\u53f7\u8fd0\u7b97\u3002<\/p>\n\n\n\n
1<\/code> \u4f1a\u5148\u8f6c\u6362\u6210 unsigned int<\/code>\uff0c\u4e8e\u662f\uff1a<\/p>\n\n\n\n
j - 1 = 0u - 1u\n<\/code><\/pre>\n\n\n\n
\u65e0\u7b26\u53f7\u6574\u6570\u8fd0\u7b97\u53d1\u751f\u4e0b\u6ea2\u65f6\uff0c\u4e0d\u662f\u5f97\u5230 -1<\/code>\uff0c\u800c\u662f\u6309\u6a21\u8fd0\u7b97\u56de\u7ed5\u3002<\/p>\n\n\n\n
\u5bf9\u4e8e 32 \u4f4d unsigned\uff1a<\/p>\n\n\n\n
0u - 1u = 2<sup>32<\/sup> - 1 = 0xFFFFFFFF\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
j - 1 = UINT_MAX\n<\/code><\/pre>\n\n\n\n
\u4e5f\u5c31\u662f\u65e0\u7b26\u53f7\u6700\u5927\u503c\u3002<\/p>\n\n\n\n
3. i <= j - 1<\/code> \u6bd4\u8f83\u65f6\uff0ci \u4e5f\u4f1a\u8f6c\u6362\u6210 unsigned<\/h3>\n\n\n\n
\u6b64\u65f6\u5de6\u8fb9\u662f\uff1a<\/p>\n\n\n\n
i = 0\n<\/code><\/pre>\n\n\n\n
\u53f3\u8fb9\u662f\uff1a<\/p>\n\n\n\n
j - 1 = 0xFFFFFFFF\n<\/code><\/pre>\n\n\n\n
\u56e0\u4e3a\u53f3\u8fb9\u662f unsigned int<\/code>\uff0c\u6240\u4ee5\u6bd4\u8f83\u65f6\uff0c\u5de6\u8fb9\u7684 i<\/code> \u4e5f\u8981\u8f6c\u6362\u6210 unsigned int<\/code>\u3002<\/p>\n\n\n\n
\u4e8e\u662f\u5224\u65ad\u53d8\u6210\uff1a<\/p>\n\n\n\n
0u <= 0xFFFFFFFFu\n<\/code><\/pre>\n\n\n\n
\u8fd9\u4e2a\u6761\u4ef6\u6210\u7acb\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u6700\u7ec8\u8f93\u51fa\uff1a<\/p>\n\n\n\n
\u738b\u9053\n<\/code><\/pre>\n\n\n\n
\u4e94\u3001C \u8bed\u8a00\u4e0d\u540c\u6574\u6570\u7c7b\u578b\u6df7\u5408\u8fd0\u7b97\u7684\u57fa\u672c\u89c4\u5219<\/h2>\n\n\n\n
408 \u4e2d\u5e38\u8003\u7684\u662f\u4e0b\u9762\u8fd9\u4e2a\u987a\u5e8f\u3002<\/p>\n\n\n\n
\u7b2c\u4e00\u6b65\uff0c\u5148\u505a\u6574\u578b\u63d0\u5347\u3002<\/p>\n\n\n\n
\u5c0f\u4e8e int<\/code> \u7684\u6574\u6570\u7c7b\u578b\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n
char\nshort\nsigned char\nunsigned char\nunsigned short\n<\/code><\/pre>\n\n\n\n
\u5728\u8868\u8fbe\u5f0f\u8fd0\u7b97\u524d\uff0c\u901a\u5e38\u4f1a\u5148\u63d0\u5347\u4e3a int<\/code>\u3002\u5982\u679c int<\/code> \u8868\u793a\u4e0d\u4e86\u5168\u90e8\u503c\uff0c\u624d\u63d0\u5347\u4e3a unsigned int<\/code>\u3002<\/p>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
short i;\n<\/code><\/pre>\n\n\n\n
\u5728\u53c2\u4e0e\u8868\u8fbe\u5f0f\u8fd0\u7b97\u65f6\uff0c\u901a\u5e38\u5148\u53d8\u6210 int<\/code>\u3002<\/p>\n\n\n\n
\u7b2c\u4e8c\u6b65\uff0c\u5982\u679c\u4e24\u8fb9\u7c7b\u578b\u4e0d\u540c\uff0c\u5c31\u505a\u901a\u5e38\u7b97\u672f\u8f6c\u6362\u3002<\/p>\n\n\n\n
\u5e38\u89c1\u89c4\u5219\u53ef\u4ee5\u8fd9\u6837\u8bb0\uff1a<\/p>\n\n\n\n
\u6709 double \u5411 double \u8f6c\uff1b\n\u6709 float \u5411 float \/ double \u8f6c\uff1b\n\u6574\u6570\u4e4b\u95f4\uff0c\u5148\u770b signed \/ unsigned\uff0c\u518d\u770b\u7b49\u7ea7 rank\u3002\n<\/code><\/pre>\n\n\n\n
\u5bf9\u4e8e 408 \u5e38\u89c1\u6574\u578b\u9898\uff0c\u91cd\u70b9\u662f signed \u548c unsigned \u7684\u6df7\u5408\u8fd0\u7b97\uff1a<\/p>\n\n\n\n
\u5982\u679c\u6709 unsigned int\uff0c\u53e6\u4e00\u4e2a int \u901a\u5e38\u4f1a\u8f6c\u6362\u6210 unsigned int\u3002\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
int a = -1;\nunsigned b = 1;\n\na < b\n<\/code><\/pre>\n\n\n\n
\u4e0d\u662f\u6bd4\u8f83\uff1a<\/p>\n\n\n\n
-1 < 1\n<\/code><\/pre>\n\n\n\n
\u800c\u662f\u5148\u628a a<\/code> \u8f6c\u6210 unsigned\uff1a<\/p>\n\n\n\n
-1 \u8f6c\u6210 unsigned = 0xFFFFFFFF\n<\/code><\/pre>\n\n\n\n
\u4e8e\u662f\u53d8\u6210\uff1a<\/p>\n\n\n\n
0xFFFFFFFF < 1\n<\/code><\/pre>\n\n\n\n
\u7ed3\u679c\u662f\u5047\u3002<\/p>\n\n\n\n
\u8fd9\u7c7b\u9898\u975e\u5e38\u5bb9\u6613\u9519\uff0c\u56e0\u4e3a\u4ece\u6570\u5b66\u76f4\u89c9\u770b -1 < 1<\/code> \u662f\u771f\uff0c\u4f46 C \u8bed\u8a00\u5b9e\u9645\u6309\u65e0\u7b26\u53f7\u6570\u6bd4\u8f83\uff0c\u7ed3\u679c\u53d8\u6210\u5047\u3002<\/p>\n\n\n\n
\u516d\u3001\u7b2c 22 \u9898\u4e3a\u4ec0\u4e48\u7528 CF\uff0c\u800c\u4e0d\u662f OF\uff1f<\/h2>\n\n\n\n
\u8fd9\u9898\u95ee\u201c\u6761\u4ef6\u5224\u65ad\u4f9d\u636e\u4ec0\u4e48\u6807\u5fd7\u5bc4\u5b58\u5668\u201d\uff0c\u7b54\u6848\u9009 CF<\/code>\uff0c\u56e0\u4e3a\u6700\u7ec8\u6bd4\u8f83\u662f\u65e0\u7b26\u53f7\u6bd4\u8f83\u3002<\/p>\n\n\n\n
\u8981\u533a\u5206\uff1a<\/p>\n\n\n\n
\u6709\u7b26\u53f7\u6570\u6bd4\u8f83\uff1a\u4e3b\u8981\u770b SF\u3001OF\u3001ZF\n\u65e0\u7b26\u53f7\u6570\u6bd4\u8f83\uff1a\u4e3b\u8981\u770b CF\u3001ZF\n<\/code><\/pre>\n\n\n\n
\u5176\u4e2d\uff1a<\/p>\n\n\n\n
CF\uff1a\u8fdb\u4f4d \/ \u501f\u4f4d\u6807\u5fd7\uff0c\u5e38\u7528\u4e8e\u65e0\u7b26\u53f7\u6570\u6bd4\u8f83\nOF\uff1a\u6ea2\u51fa\u6807\u5fd7\uff0c\u5e38\u7528\u4e8e\u6709\u7b26\u53f7\u6570\u6bd4\u8f83\nZF\uff1a\u96f6\u6807\u5fd7\uff0c\u7528\u4e8e\u5224\u65ad\u662f\u5426\u76f8\u7b49\n<\/code><\/pre>\n\n\n\n
\u5bf9\u4e8e\u65e0\u7b26\u53f7\u6bd4\u8f83\uff1a<\/p>\n\n\n\n
a < b  \u770b CF = 1\na == b \u770b ZF = 1\na <= b \u770b CF = 1 \u6216 ZF = 1\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u4e25\u683c\u8bf4\uff0c<=<\/code> \u8fd9\u79cd\u5224\u65ad\u4e0d\u4ec5\u53ef\u80fd\u6d89\u53ca CF<\/code>\uff0c\u4e5f\u4f1a\u6d89\u53ca ZF<\/code>\u3002\u4f46\u5728\u9009\u62e9\u9898\u91cc\uff0c\u901a\u5e38\u628a\u201c\u65e0\u7b26\u53f7\u6bd4\u8f83\u201d\u5f52\u7ed3\u4e3a\u770b CF<\/code>\uff0c\u628a\u201c\u6709\u7b26\u53f7\u6bd4\u8f83\u201d\u5f52\u7ed3\u4e3a\u770b OF<\/code> \u76f8\u5173\u6807\u5fd7\u3002<\/p>\n\n\n\n
\u56e0\u6b64\u7b2c 22 \u9898\u9009\uff1a<\/p>\n\n\n\n
CF\uff0c\u738b\u9053\n<\/code><\/pre>\n\n\n\n
\u4e03\u3001\u505a\u8fd9\u7c7b\u9898\u7684\u56fa\u5b9a\u6d41\u7a0b<\/h2>\n\n\n\n
\u9047\u5230 C \u8bed\u8a00\u6574\u6570\u8f6c\u6362\u9898\uff0c\u6700\u597d\u4e0d\u8981\u76f4\u63a5\u51ed\u76f4\u89c9\u6bd4\u8f83\uff0c\u800c\u662f\u6309\u4e0b\u9762\u987a\u5e8f\u8d70\uff1a<\/p>\n\n\n\n
1. \u5148\u770b\u53d8\u91cf\u58f0\u660e\u7c7b\u578b\uff1aint\u3001short\u3001unsigned\u3001char \u7b49\uff1b\n2. \u770b\u8d4b\u503c\u65f6\u662f\u5426\u53d1\u751f\u622a\u65ad\uff1b\n3. \u770b\u8868\u8fbe\u5f0f\u4e2d\u662f\u5426\u6709 unsigned\uff1b\n4. \u5c0f\u6574\u578b\u5148\u63d0\u5347\u4e3a int\uff1b\n5. signed \u548c unsigned \u6df7\u5408\u65f6\uff0c\u901a\u5e38\u8f6c\u6210 unsigned\uff1b\n6. \u6700\u540e\u518d\u5224\u65ad\u6bd4\u8f83\u7ed3\u679c\u548c\u8f93\u51fa\u3002\n<\/code><\/pre>\n\n\n\n
\u7b2c 22 \u9898\u5b8c\u6574\u6d41\u7a0b\u5c31\u662f\uff1a<\/p>\n\n\n\n
si = 65536 = 0x00010000\n\nshort i = si\n=> i \u53d6\u4f4e 16 \u4f4d\n=> i = 0\n\nunsigned j = 0\n\nj - 1\n=> 0u - 1u\n=> 0xFFFFFFFFu\n\ni <= j - 1\n=> 0u <= 0xFFFFFFFFu\n=> true\n\n\u8f93\u51fa\uff1a\u738b\u9053\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u8fd9\u9053\u9898\u771f\u6b63\u8003\u7684\u662f\uff1aC \u8bed\u8a00\u4e2d unsigned \u4f1a\u201c\u6c61\u67d3\u201d\u6574\u4e2a\u8868\u8fbe\u5f0f\uff0c\u4f7f\u6bd4\u8f83\u8f6c\u4e3a\u65e0\u7b26\u53f7\u6bd4\u8f83\u3002<\/strong><\/p>\n\n\n\n
\n\n\n\n
\u57282021\u9898\u91cc\u9762\uff0ccah \uff0c8ch\u6211\u80fd\u77e5\u9053\u5b83\u662f\u5426\u4f1a\u6ea2\u51fa\uff0c\u4f46\u662f\u6211\u4e0d\u77e5\u9053\uff0c\u5c31\u662f\u8bf4\u5b83\u6ea2\u51fa\u7684\u65f6\u5019\u4f1a\u8f93\u51fa\u4ec0\u4e48\u6837\u7684\u7ed3\u679c\uff0c\u4ee5\u53ca\u5728\u7b2c22\u9898\u91cc\u9762\u6807\u5fd7\u5bc4\u5b58\u5668\u4e2d\u7684cf of\u8fd9\u51e0\u4e2a\u6982\u5ff5\uff0c\u5176\u5b9e\u6211\u4e5f\u4e0d\u592a\u7406\u89e3\uff0c\u4f60\u80fd\u7ed9\u6211\u8bb2\u4e00\u4e0b\u5417\uff1f<\/p>\n\n\n\n
\u4f60\u8fd9\u91cc\u95ee\u7684\u662f\u4e24\u4e2a\u5f88\u5173\u952e\u7684\u70b9\uff1a\u7b2c\u4e00\uff0c\u8865\u7801\u8fd0\u7b97\u53d1\u751f\u6ea2\u51fa\u65f6\uff0c\u673a\u5668\u5230\u5e95\u7ed9\u51fa\u4ec0\u4e48\u7ed3\u679c<\/strong>\uff1b\u7b2c\u4e8c\uff0cCF\u3001OF \u8fd9\u4e9b\u6807\u5fd7\u4f4d\u5230\u5e95\u8868\u793a\u4ec0\u4e48\uff0c\u4ee5\u53ca\u4e3a\u4ec0\u4e48\u7b2c 22 \u9898\u770b CF \u800c\u4e0d\u662f OF<\/strong>\u3002<\/p>\n\n\n\n
\u5148\u8bf4\u7ed3\u8bba\uff1a\u6ea2\u51fa\u65f6\uff0c\u673a\u5668\u4ecd\u7136\u4f1a\u8f93\u51fa\u4e00\u4e2a\u56fa\u5b9a\u5b57\u957f\u7684\u4e8c\u8fdb\u5236\u7ed3\u679c\uff0c\u4f46\u8fd9\u4e2a\u7ed3\u679c\u5df2\u7ecf\u4e0d\u80fd\u5f53\u4f5c\u6b63\u786e\u7684\u6709\u7b26\u53f7\u771f\u503c\u6765\u89e3\u91ca\u3002<\/strong>
\u4e5f\u5c31\u662f\u8bf4\uff0c\u5bc4\u5b58\u5668\u4e0d\u4f1a\u56e0\u4e3a\u6ea2\u51fa\u5c31\u201c\u4e0d\u8f93\u51fa\u201d\u6216\u8005\u8f93\u51fa\u7279\u6b8a\u7b26\u53f7\uff0c\u800c\u662f\u7167\u6837\u628a\u4f4e 8 \u4f4d\u3001\u4f4e 16 \u4f4d\u3001\u4f4e 32 \u4f4d\u4fdd\u7559\u4e0b\u6765\uff0c\u540c\u65f6\u628a\u6ea2\u51fa\u6807\u5fd7 OF<\/code> \u7f6e\u4e3a 1\uff0c\u544a\u8bc9\u540e\u7eed\u7535\u8def\u6216\u7a0b\u5e8f\uff1a\u201c\u8fd9\u4e2a\u6709\u7b26\u53f7\u7ed3\u679c\u4e0d\u53ef\u4fe1\u201d\u3002<\/p>\n\n\n\n
\u4e00\u3001\u8865\u7801\u6ea2\u51fa\u65f6\uff0c\u673a\u5668\u8f93\u51fa\u7684\u662f\u4ec0\u4e48\uff1f<\/h2>\n\n\n\n
\u4ee5\u7b2c 21 \u9898\u4e3a\u4f8b\uff1a<\/p>\n\n\n\n
[x]\u8865 = 44H\n[y]\u8865 = DCH\n\u6c42 x - 2y \u7684\u673a\u5668\u6570\u548c OF\n<\/code><\/pre>\n\n\n\n
\u5148\u8f6c\u771f\u503c\uff1a<\/p>\n\n\n\n
44H = 0100 0100 = 68\n\nDCH = 1101 1100\n\u6700\u9ad8\u4f4d\u4e3a 1\uff0c\u662f\u8d1f\u6570\n\u771f\u503c = 220 - 256 = -36\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
x = 68\ny = -36\n\nx - 2y = 68 - 2 \u00d7 (-36)\n       = 68 + 72\n       = 140\n<\/code><\/pre>\n\n\n\n
\u4f46\u662f 8 \u4f4d\u8865\u7801\u7684\u8868\u793a\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n
-128 ~ +127\n<\/code><\/pre>\n\n\n\n
140<\/code> \u8d85\u8fc7\u4e86\u6700\u5927\u6b63\u6570 127<\/code>\uff0c\u6240\u4ee5\u53d1\u751f\u6b63\u6ea2\u51fa\uff0cOF = 1<\/code>\u3002<\/p>\n\n\n\n
\u4f46\u662f\u673a\u5668\u4e0d\u4f1a\u505c\u5728\u90a3\u91cc\u3002\u673a\u5668\u4ecd\u7136\u4f1a\u6309 8 \u4f4d\u8865\u7801\u8fd0\u7b97\u7ed9\u51fa\u7ed3\u679c\u3002<\/p>\n\n\n\n
\u5148\u7b97 2y<\/code>\uff1a<\/p>\n\n\n\n
y = DCH = 1101 1100\n\n\u7b97\u672f\u5de6\u79fb\u4e00\u4f4d\uff1a\n\n1101 1100 << 1 = 1011 1000 = B8H\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
x - 2y = 44H - B8H\n<\/code><\/pre>\n\n\n\n
\u51cf\u6cd5\u7528\u52a0\u6cd5\u5b9e\u73b0\uff1a<\/p>\n\n\n\n
44H - B8H\n= 44H + B8H \u7684\u8865\u7801\u76f8\u53cd\u6570\n= 44H + (~B8H + 1)\n<\/code><\/pre>\n\n\n\n
\u8ba1\u7b97\uff1a<\/p>\n\n\n\n
B8H = 1011 1000\n~B8H = 0100 0111 = 47H\n~B8H + 1 = 0100 1000 = 48H\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
44H - B8H\n= 44H + 48H\n<\/code><\/pre>\n\n\n\n
\u4e8c\u8fdb\u5236\u76f8\u52a0\uff1a<\/p>\n\n\n\n
  0100 0100\n+ 0100 1000\n------------\n  1000 1100\n<\/code><\/pre>\n\n\n\n
\u7ed3\u679c\u5c31\u662f\uff1a<\/p>\n\n\n\n
1000 1100 = 8CH\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u7b2c 21 \u9898\u7684\u673a\u5668\u7ed3\u679c\u662f\uff1a<\/p>\n\n\n\n
8CH\uff0cOF = 1\n<\/code><\/pre>\n\n\n\n
\u5173\u952e\u5c31\u5728\u8fd9\u91cc\uff1a8CH \u662f\u673a\u5668\u5b9e\u9645\u7b97\u51fa\u6765\u5e76\u4fdd\u7559\u5728\u5bc4\u5b58\u5668\u91cc\u7684 8 \u4f4d\u7ed3\u679c\uff0c\u4f46\u7531\u4e8e OF = 1\uff0c\u5b83\u4e0d\u80fd\u4f5c\u4e3a\u6b63\u786e\u7684\u6709\u7b26\u53f7\u8865\u7801\u7ed3\u679c\u6765\u89e3\u91ca\u3002<\/strong><\/p>\n\n\n\n
\u5982\u679c\u5f3a\u884c\u628a 8CH<\/code> \u5f53\u4f5c 8 \u4f4d\u8865\u7801\u89e3\u91ca\uff1a<\/p>\n\n\n\n
8CH = 1000 1100\n\u65e0\u7b26\u53f7\u503c = 140\n\u8865\u7801\u771f\u503c = 140 - 256 = -116\n<\/code><\/pre>\n\n\n\n
\u8fd9\u5c31\u53d8\u6210\u4e86 -116<\/code>\uff0c\u663e\u7136\u548c\u771f\u5b9e\u6570\u5b66\u7ed3\u679c +140<\/code> \u4e0d\u4e00\u81f4\u3002\u8fd9\u4e2a\u201c\u4e0d\u4e00\u81f4\u201d\u6b63\u662f\u6ea2\u51fa\u7684\u8868\u73b0\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u8981\u5206\u6e05\u4e24\u53e5\u8bdd\uff1a<\/p>\n\n\n\n
\u673a\u5668\u7ed3\u679c\uff1a8CH\n\u771f\u5b9e\u6570\u5b66\u7ed3\u679c\uff1a+140\n8 \u4f4d\u8865\u7801\u65e0\u6cd5\u8868\u793a +140\n\u56e0\u6b64 OF = 1\uff0c\u673a\u5668\u7ed3\u679c\u4f5c\u4e3a\u6709\u7b26\u53f7\u6570\u65e0\u6548\n<\/code><\/pre>\n\n\n\n
\u4e8c\u3001\u4e3a\u4ec0\u4e48\u6ea2\u51fa\u540e\u4f1a\u53d8\u6210 8CH\uff1f<\/h2>\n\n\n\n
\u56e0\u4e3a\u56fa\u5b9a\u5b57\u957f\u673a\u5668\u53ea\u4fdd\u7559\u4f4e n \u4f4d\u3002<\/p>\n\n\n\n
8 \u4f4d\u673a\u5668\u4e2d\uff0c\u6240\u6709\u8fd0\u7b97\u7ed3\u679c\u6700\u540e\u90fd\u53ea\u80fd\u843d\u5728 8 \u4f4d\u91cc\u3002\u8d85\u8fc7 8 \u4f4d\u7684\u90e8\u5206\u8981\u4e48\u88ab\u4e22\u5f03\uff0c\u8981\u4e48\u901a\u8fc7\u6807\u5fd7\u4f4d\u53cd\u6620\u51fa\u6765\u3002<\/p>\n\n\n\n
\u5bf9\u4e8e\u7b2c 21 \u9898\uff1a<\/p>\n\n\n\n
\u771f\u5b9e\u6570\u5b66\u7ed3\u679c = 140\n<\/code><\/pre>\n\n\n\n
140 \u7684\u4e8c\u8fdb\u5236\u662f\uff1a<\/p>\n\n\n\n
140 = 1000 1100\n<\/code><\/pre>\n\n\n\n
\u5b83\u521a\u597d\u662f 8 \u4f4d\uff0c\u4f46\u95ee\u9898\u5728\u4e8e\uff1a8 \u4f4d\u8865\u7801\u91cc\uff0c\u6700\u9ad8\u4f4d\u662f\u7b26\u53f7\u4f4d\u3002<\/strong><\/p>\n\n\n\n
8 \u4f4d\u8865\u7801\u4e2d\uff1a<\/p>\n\n\n\n
0000 0000 ~ 0111 1111 \u8868\u793a 0 ~ +127\n1000 0000 ~ 1111 1111 \u8868\u793a -128 ~ -1\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5 1000 1100<\/code> \u5728 8 \u4f4d\u8865\u7801\u8bed\u5883\u4e0b\u4e0d\u662f +140<\/code>\uff0c\u800c\u662f -116<\/code>\u3002<\/p>\n\n\n\n
\u8fd9\u5c31\u662f\u8865\u7801\u6709\u7b26\u53f7\u6ea2\u51fa\u7684\u672c\u8d28\uff1a\u4e8c\u8fdb\u5236\u4f4d\u5f62\u8fd8\u5728\uff0c\u4f46\u5b83\u5df2\u7ecf\u843d\u5165\u4e86\u9519\u8bef\u7684\u7b26\u53f7\u533a\u95f4\u3002<\/strong><\/p>\n\n\n\n
\u53ef\u4ee5\u8fd9\u6837\u7406\u89e3\uff1a<\/p>\n\n\n\n
\u6570\u5b66\u4e0a\uff1a68 + 72 = 140\n\n\u673a\u5668\u4e0a\uff1a\n0100 0100 + 0100 1000 = 1000 1100\n\n\u4e24\u4e2a\u6b63\u6570\u76f8\u52a0\uff0c\u7ed3\u679c\u6700\u9ad8\u4f4d\u5374\u53d8\u6210 1\uff0c\u50cf\u8d1f\u6570\n\u6240\u4ee5\u53d1\u751f\u6b63\u6ea2\u51fa\n<\/code><\/pre>\n\n\n\n
\u8fd9\u7c7b\u9898\u4ee5\u540e\u53ef\u4ee5\u76f4\u63a5\u7528\u8fd9\u4e2a\u89c4\u5219\u5224\u65ad\uff1a<\/p>\n\n\n\n
\u6b63\u6570 + \u6b63\u6570 = \u8d1f\u6570\uff0c\u6b63\u6ea2\u51fa\n\u8d1f\u6570 + \u8d1f\u6570 = \u6b63\u6570\uff0c\u8d1f\u6ea2\u51fa\n\u5f02\u53f7\u76f8\u52a0\uff0c\u4e0d\u6ea2\u51fa\n<\/code><\/pre>\n\n\n\n
\u7b2c 21 \u9898\u672c\u8d28\u4e0a\u5c31\u662f\uff1a<\/p>\n\n\n\n
68 + 72\n<\/code><\/pre>\n\n\n\n
\u4e24\u4e2a\u6b63\u6570\u76f8\u52a0\uff0c\u7ed3\u679c\u673a\u5668\u4f4d\u5f62\u4e3a\uff1a<\/p>\n\n\n\n
1000 1100\n<\/code><\/pre>\n\n\n\n
\u6700\u9ad8\u4f4d\u4e3a 1\uff0c\u7ed3\u679c\u50cf\u8d1f\u6570\uff0c\u6240\u4ee5\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u4e09\u3001\u7b2c 20 \u9898\u548c\u7b2c 21 \u9898\u7684\u533a\u522b<\/h2>\n\n\n\n
\u7b2c 20 \u9898\u662f\uff1a<\/p>\n\n\n\n
x\/2 + 2y\n<\/code><\/pre>\n\n\n\n
\u5df2\u77e5\uff1a<\/p>\n\n\n\n
x = 68\ny = -36\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
x\/2 + 2y\n= 34 + 2 \u00d7 (-36)\n= 34 - 72\n= -38\n<\/code><\/pre>\n\n\n\n
-38<\/code> \u5728 8 \u4f4d\u8865\u7801\u8303\u56f4\u5185\uff0c\u6240\u4ee5\u4e0d\u6ea2\u51fa\u3002<\/p>\n\n\n\n
-38<\/code> \u7684\u8865\u7801\uff1a<\/p>\n\n\n\n
38 = 0010 0110\n-38 = 1101 1010 = DAH\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u7b2c 20 \u9898\u662f\uff1a<\/p>\n\n\n\n
DAH\uff0cOF = 0\n<\/code><\/pre>\n\n\n\n
\u7b2c 21 \u9898\u662f\uff1a<\/p>\n\n\n\n
x - 2y = 140\n<\/code><\/pre>\n\n\n\n
\u8d85\u8fc7 +127<\/code>\uff0c\u6240\u4ee5\uff1a<\/p>\n\n\n\n
8CH\uff0cOF = 1\n<\/code><\/pre>\n\n\n\n
\u4e24\u9898\u7684\u533a\u522b\u4e0d\u662f\u201c\u673a\u5668\u80fd\u4e0d\u80fd\u7b97\u51fa\u4e00\u4e2a\u5341\u516d\u8fdb\u5236\u7ed3\u679c\u201d\uff0c\u800c\u662f\uff1a<\/p>\n\n\n\n
\u7b2c 20 \u9898\uff1a\u673a\u5668\u7ed3\u679c DAH \u80fd\u6b63\u786e\u8868\u793a -38\uff0c\u6240\u4ee5 OF = 0\n\u7b2c 21 \u9898\uff1a\u673a\u5668\u7ed3\u679c 8CH \u4e0d\u80fd\u6b63\u786e\u8868\u793a +140\uff0c\u6240\u4ee5 OF = 1\n<\/code><\/pre>\n\n\n\n
\u56db\u3001CF \u548c OF \u7684\u6838\u5fc3\u533a\u522b<\/h2>\n\n\n\n
CF<\/code> \u548c OF<\/code> \u90fd\u548c\u201c\u8d85\u8fc7\u8303\u56f4\u201d\u6709\u5173\uff0c\u4f46\u5b83\u4eec\u670d\u52a1\u7684\u5bf9\u8c61\u4e0d\u540c\u3002<\/p>\n\n\n\n
CF\uff1aCarry Flag\uff0c\u8fdb\u4f4d \/ \u501f\u4f4d\u6807\u5fd7\uff0c\u4e3b\u8981\u7528\u4e8e\u65e0\u7b26\u53f7\u6570\u8fd0\u7b97\nOF\uff1aOverflow Flag\uff0c\u6ea2\u51fa\u6807\u5fd7\uff0c\u4e3b\u8981\u7528\u4e8e\u6709\u7b26\u53f7\u8865\u7801\u8fd0\u7b97\n<\/code><\/pre>\n\n\n\n
\u8fd9\u53e5\u8bdd\u975e\u5e38\u91cd\u8981\u3002<\/p>\n\n\n\n
\u540c\u4e00\u4e32\u4e8c\u8fdb\u5236\uff0c\u65e2\u53ef\u4ee5\u88ab\u89e3\u91ca\u6210\u65e0\u7b26\u53f7\u6570\uff0c\u4e5f\u53ef\u4ee5\u88ab\u89e3\u91ca\u6210\u6709\u7b26\u53f7\u8865\u7801\u6570\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n
1000 1100\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u770b\u6210\u65e0\u7b26\u53f7\u6570\uff1a<\/p>\n\n\n\n
1000 1100 = 140\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u770b\u6210 8 \u4f4d\u8865\u7801\uff1a<\/p>\n\n\n\n
1000 1100 = -116\n<\/code><\/pre>\n\n\n\n
\u673a\u5668\u52a0\u6cd5\u5668\u672c\u8eab\u5e76\u4e0d\u77e5\u9053\u7a0b\u5e8f\u5458\u60f3\u628a\u5b83\u5f53\u6709\u7b26\u53f7\u6570\u8fd8\u662f\u65e0\u7b26\u53f7\u6570\u3002\u673a\u5668\u53ea\u8d1f\u8d23\u4e8c\u8fdb\u5236\u76f8\u52a0\uff0c\u7136\u540e\u8bbe\u7f6e\u6807\u5fd7\u4f4d\u3002\u5230\u5e95\u8be5\u770b CF<\/code> \u8fd8\u662f OF<\/code>\uff0c\u53d6\u51b3\u4e8e\u8fd9\u6b21\u8fd0\u7b97\u88ab\u5f53\u4f5c\u4ec0\u4e48\u7c7b\u578b\u6765\u89e3\u91ca\u3002<\/p>\n\n\n\n
\u4e94\u3001CF\uff1a\u65e0\u7b26\u53f7\u6570\u7684\u8fdb\u4f4d \/ \u501f\u4f4d<\/h2>\n\n\n\n
CF<\/code> \u4e3b\u8981\u7528\u4e8e\u65e0\u7b26\u53f7\u6570\u3002<\/p>\n\n\n\n
\u5bf9\u4e8e\u52a0\u6cd5\uff1a<\/p>\n\n\n\n
\u5982\u679c\u6700\u9ad8\u4f4d\u5411\u66f4\u9ad8\u4f4d\u4ea7\u751f\u8fdb\u4f4d\uff0c\u5219 CF = 1\n\u5426\u5219 CF = 0\n<\/code><\/pre>\n\n\n\n
\u4f8b\u5982 8 \u4f4d\u65e0\u7b26\u53f7\u52a0\u6cd5\uff1a<\/p>\n\n\n\n
  1111 1111   = 255\n+ 0000 0001   = 1\n------------\n1 0000 0000\n<\/code><\/pre>\n\n\n\n
8 \u4f4d\u5bc4\u5b58\u5668\u53ea\u80fd\u4fdd\u7559\u4f4e 8 \u4f4d\uff1a<\/p>\n\n\n\n
0000 0000\n<\/code><\/pre>\n\n\n\n
\u4f46\u6700\u9ad8\u4f4d\u4ea7\u751f\u4e86\u8fdb\u4f4d\uff0c\u6240\u4ee5\uff1a<\/p>\n\n\n\n
CF = 1\n<\/code><\/pre>\n\n\n\n
\u8fd9\u8868\u793a\u65e0\u7b26\u53f7\u52a0\u6cd5\u6ea2\u51fa\uff1a<\/p>\n\n\n\n
255 + 1 = 256\n<\/code><\/pre>\n\n\n\n
\u800c 8 \u4f4d\u65e0\u7b26\u53f7\u6570\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n
0 ~ 255\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u8d85\u8303\u56f4\u3002<\/p>\n\n\n\n
\u4f46\u662f\u5982\u679c\u4ece\u6709\u7b26\u53f7\u8865\u7801\u89d2\u5ea6\u770b\uff1a<\/p>\n\n\n\n
1111 1111 = -1\n0000 0001 = +1\n<\/code><\/pre>\n\n\n\n
\u90a3\u4e48\uff1a<\/p>\n\n\n\n
-1 + 1 = 0\n<\/code><\/pre>\n\n\n\n
\u6709\u7b26\u53f7\u8fd0\u7b97\u5e76\u6ca1\u6709\u6ea2\u51fa\uff0c\u6240\u4ee5\uff1a<\/p>\n\n\n\n
OF = 0\n<\/code><\/pre>\n\n\n\n
\u8fd9\u4e2a\u4f8b\u5b50\u8bf4\u660e\uff1a<\/p>\n\n\n\n
CF = 1 \u4e0d\u4e00\u5b9a OF = 1\nOF = 1 \u4e5f\u4e0d\u4e00\u5b9a CF = 1\n<\/code><\/pre>\n\n\n\n
\u5b83\u4eec\u4e0d\u662f\u4e00\u56de\u4e8b\u3002<\/p>\n\n\n\n
\u516d\u3001OF\uff1a\u6709\u7b26\u53f7\u8865\u7801\u7684\u6ea2\u51fa<\/h2>\n\n\n\n
OF<\/code> \u4e3b\u8981\u7528\u4e8e\u6709\u7b26\u53f7\u8865\u7801\u8fd0\u7b97\u3002<\/p>\n\n\n\n
\u8865\u7801\u52a0\u6cd5\u5224\u65ad OF\uff0c\u6700\u5e38\u7528\u7684\u662f\uff1a<\/p>\n\n\n\n
\u540c\u53f7\u76f8\u52a0\uff0c\u7ed3\u679c\u53d8\u53f7\uff0c\u5219 OF = 1\n\u5f02\u53f7\u76f8\u52a0\uff0c\u4e0d\u4f1a\u6ea2\u51fa\n<\/code><\/pre>\n\n\n\n
\u4f8b\u5982\u7b2c 21 \u9898\u4e2d\u7684\u6838\u5fc3\u52a0\u6cd5\uff1a<\/p>\n\n\n\n
  0100 0100   = +68\n+ 0100 1000   = +72\n------------\n  1000 1100\n<\/code><\/pre>\n\n\n\n
\u4e24\u4e2a\u64cd\u4f5c\u6570\u90fd\u662f\u6b63\u6570\uff0c\u7ed3\u679c\u5374\u53d8\u6210\u6700\u9ad8\u4f4d\u4e3a 1\uff0c\u597d\u50cf\u662f\u8d1f\u6570\u3002<\/p>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
OF = 1\n<\/code><\/pre>\n\n\n\n
\u4f46\u662f\u8fd9\u4e2a\u52a0\u6cd5\u6709\u6ca1\u6709\u4ea7\u751f\u6700\u9ad8\u8fdb\u4f4d\u5462\uff1f<\/p>\n\n\n\n
0100 0100 + 0100 1000 = 1000 1100\n<\/code><\/pre>\n\n\n\n
\u6ca1\u6709\u8d85\u8fc7 8 \u4f4d\uff0c\u6ca1\u6709\u4ea7\u751f\u7b2c 9 \u4f4d\u8fdb\u4f4d\uff0c\u6240\u4ee5\uff1a<\/p>\n\n\n\n
CF = 0\n<\/code><\/pre>\n\n\n\n
\u8fd9\u5c31\u662f\u975e\u5e38\u5178\u578b\u7684\u60c5\u51b5\uff1a<\/p>\n\n\n\n
OF = 1\uff0cCF = 0\n<\/code><\/pre>\n\n\n\n
\u542b\u4e49\u662f\uff1a<\/p>\n\n\n\n
\u4f5c\u4e3a\u6709\u7b26\u53f7\u8865\u7801\u8fd0\u7b97\uff0c\u5b83\u6ea2\u51fa\u4e86\uff1b\n\u4f5c\u4e3a\u65e0\u7b26\u53f7\u52a0\u6cd5\uff0c68 + 72 = 140\uff0c\u6ca1\u6709\u8d85\u8fc7 255\uff0c\u6240\u4ee5\u6ca1\u6709\u65e0\u7b26\u53f7\u8fdb\u4f4d\u3002\n<\/code><\/pre>\n\n\n\n
\u4e03\u3001\u540c\u4e00\u4e2a\u7ed3\u679c\uff0cCF \u548c OF \u53ef\u4ee5\u4e0d\u540c<\/h2>\n\n\n\n
\u7528\u51e0\u4e2a 8 \u4f4d\u4f8b\u5b50\u5bf9\u6bd4\u4e00\u4e0b\u66f4\u6e05\u695a\u3002<\/p>\n\n\n\n
\u8fd0\u7b97<\/th>\u673a\u5668\u7ed3\u679c<\/th>\u65e0\u7b26\u53f7\u89d2\u5ea6<\/th>\u6709\u7b26\u53f7\u89d2\u5ea6<\/th>CF<\/th>OF<\/th><\/tr><\/thead>
FFH + 01H<\/code><\/td>00H<\/code><\/td>255 + 1 = 256<\/code>\uff0c\u65e0\u7b26\u53f7\u6ea2\u51fa<\/td>-1 + 1 = 0<\/code>\uff0c\u4e0d\u6ea2\u51fa<\/td>1<\/td>0<\/td><\/tr>
44H + 48H<\/code><\/td>8CH<\/code><\/td>68 + 72 = 140<\/code>\uff0c\u672a\u8d85\u8fc7 255<\/td>68 + 72 = 140<\/code>\uff0c\u8d85\u8fc7 +127<\/td>0<\/td>1<\/td><\/tr>
80H + 80H<\/code><\/td>00H<\/code><\/td>128 + 128 = 256<\/code>\uff0c\u65e0\u7b26\u53f7\u6ea2\u51fa<\/td>-128 + -128 = -256<\/code>\uff0c\u6709\u7b26\u53f7\u6ea2\u51fa<\/td>1<\/td>1<\/td><\/tr>
01H + 01H<\/code><\/td>02H<\/code><\/td>\u6b63\u5e38<\/td>\u6b63\u5e38<\/td>0<\/td>0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\u6240\u4ee5\u4e0d\u8981\u628a CF<\/code> \u548c OF<\/code> \u6df7\u6210\u4e00\u4e2a\u201c\u6ea2\u51fa\u6807\u5fd7\u201d\u3002<\/p>\n\n\n\n
\u66f4\u51c6\u786e\u5730\u8bf4\uff1a<\/p>\n\n\n\n
CF \u5224\u65ad\u65e0\u7b26\u53f7\u6570\u662f\u5426\u8d85\u51fa\u8303\u56f4\uff1b\nOF \u5224\u65ad\u6709\u7b26\u53f7\u8865\u7801\u6570\u662f\u5426\u8d85\u51fa\u8303\u56f4\u3002\n<\/code><\/pre>\n\n\n\n
\u516b\u3001\u51cf\u6cd5\u548c\u6bd4\u8f83\u65f6\uff0cCF \u600e\u4e48\u7406\u89e3\uff1f<\/h2>\n\n\n\n
\u51cf\u6cd5\u4e2d\uff0cCF<\/code> \u901a\u5e38\u8868\u793a\u501f\u4f4d\u3002<\/p>\n\n\n\n
\u4f8b\u5982\u65e0\u7b26\u53f7\u6570\uff1a<\/p>\n\n\n\n
0 - 1\n<\/code><\/pre>\n\n\n\n
\u663e\u7136\u4e0d\u591f\u51cf\uff0c\u9700\u8981\u501f\u4f4d\uff0c\u6240\u4ee5\uff1a<\/p>\n\n\n\n
CF = 1\n<\/code><\/pre>\n\n\n\n
\u5728\u56fa\u5b9a 8 \u4f4d\u4e2d\uff1a<\/p>\n\n\n\n
0000 0000 - 0000 0001 = 1111 1111\n<\/code><\/pre>\n\n\n\n
\u673a\u5668\u7ed3\u679c\u662f FFH<\/code>\uff0c\u4e5f\u5c31\u662f\u65e0\u7b26\u53f7\u7684 255<\/code>\u3002\u8fd9\u4e0d\u662f\u6570\u5b66\u4e0a\u7684 -1<\/code>\uff0c\u800c\u662f\u65e0\u7b26\u53f7\u6a21\u8fd0\u7b97\u56de\u7ed5\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u65e0\u7b26\u53f7\u6bd4\u8f83\u65f6\uff0c\u5e38\u901a\u8fc7\u51cf\u6cd5\u6765\u8bbe\u7f6e\u6807\u5fd7\u4f4d\u3002<\/p>\n\n\n\n
\u4f8b\u5982\u6bd4\u8f83\uff1a<\/p>\n\n\n\n
a < b\n<\/code><\/pre>\n\n\n\n
\u673a\u5668\u5185\u90e8\u53ef\u4ee5\u505a\uff1a<\/p>\n\n\n\n
a - b\n<\/code><\/pre>\n\n\n\n
\u5982\u679c a - b<\/code> \u9700\u8981\u501f\u4f4d\uff0c\u8bf4\u660e\uff1a<\/p>\n\n\n\n
a < b\n<\/code><\/pre>\n\n\n\n
\u4e8e\u662f\uff1a<\/p>\n\n\n\n
CF = 1\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u65e0\u7b26\u53f7\u6bd4\u8f83\u5e38\u7528\u89c4\u5219\u662f\uff1a<\/p>\n\n\n\n
a < b    \u770b CF = 1\na == b   \u770b ZF = 1\na <= b   \u770b CF = 1 \u6216 ZF = 1\n<\/code><\/pre>\n\n\n\n
\u5176\u4e2d ZF<\/code> \u662f\u96f6\u6807\u5fd7\u4f4d\uff0c\u8868\u793a\u7ed3\u679c\u662f\u5426\u4e3a 0\u3002<\/p>\n\n\n\n
\u4e5d\u3001OF \u5728\u6709\u7b26\u53f7\u6bd4\u8f83\u4e2d\u7684\u4f5c\u7528<\/h2>\n\n\n\n
\u6709\u7b26\u53f7\u6bd4\u8f83\u4e0d\u80fd\u7b80\u5355\u770b\u6700\u9ad8\u4f4d\uff0c\u56e0\u4e3a\u6709\u7b26\u53f7\u8fd0\u7b97\u53ef\u80fd\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u4f8b\u5982\u5224\u65ad\uff1a<\/p>\n\n\n\n
a < b\n<\/code><\/pre>\n\n\n\n
\u673a\u5668\u53ef\u4ee5\u8ba1\u7b97\uff1a<\/p>\n\n\n\n
a - b\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u7ed3\u679c\u662f\u8d1f\u6570\uff0c\u901a\u5e38\u8bf4\u660e a < b<\/code>\u3002\u4f46\u662f\u5982\u679c\u51cf\u6cd5\u53d1\u751f\u6709\u7b26\u53f7\u6ea2\u51fa\uff0c\u7ed3\u679c\u7684\u7b26\u53f7\u4f4d\u53ef\u80fd\u662f\u9519\u7684\u3002\u8fd9\u65f6\u5c31\u9700\u8981\u7ed3\u5408 OF<\/code> \u4fee\u6b63\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u6709\u7b26\u53f7\u6bd4\u8f83\u5e38\u7528\uff1a<\/p>\n\n\n\n
SF \u548c OF\n<\/code><\/pre>\n\n\n\n
\u5176\u4e2d\uff1a<\/p>\n\n\n\n
SF\uff1aSign Flag\uff0c\u7b26\u53f7\u6807\u5fd7\uff0c\u7b49\u4e8e\u7ed3\u679c\u6700\u9ad8\u4f4d\nOF\uff1aOverflow Flag\uff0c\u6709\u7b26\u53f7\u6ea2\u51fa\u6807\u5fd7\nZF\uff1aZero Flag\uff0c\u96f6\u6807\u5fd7\n<\/code><\/pre>\n\n\n\n
\u5e38\u89c1\u89c4\u5219\u662f\uff1a<\/p>\n\n\n\n
\u6709\u7b26\u53f7 a < b\uff1a\u770b SF \u2295 OF = 1\n\u6709\u7b26\u53f7 a <= b\uff1a\u770b ZF = 1 \u6216 SF \u2295 OF = 1\n<\/code><\/pre>\n\n\n\n
\u8003\u7814\u91cc\u4e0d\u4e00\u5b9a\u8981\u6c42\u628a\u8fd9\u51e0\u4e2a\u8df3\u8f6c\u6761\u4ef6\u5168\u90e8\u80cc\u4e0b\u6765\uff0c\u4f46\u8981\u77e5\u9053\u5927\u65b9\u5411\uff1a<\/p>\n\n\n\n
\u65e0\u7b26\u53f7\u6bd4\u8f83\uff1a\u4e3b\u8981\u770b CF\u3001ZF\n\u6709\u7b26\u53f7\u6bd4\u8f83\uff1a\u4e3b\u8981\u770b SF\u3001OF\u3001ZF\n<\/code><\/pre>\n\n\n\n
\u7b2c 22 \u9898\u95ee CF \/ OF<\/code>\uff0c\u672c\u8d28\u5c31\u662f\u8ba9\u5224\u65ad\uff1a\u8fd9\u6b21\u6bd4\u8f83\u662f\u65e0\u7b26\u53f7\u6bd4\u8f83\uff0c\u8fd8\u662f\u6709\u7b26\u53f7\u6bd4\u8f83\u3002<\/p>\n\n\n\n
\u5341\u3001\u7b2c 22 \u9898\u4e3a\u4ec0\u4e48\u770b CF\uff0c\u800c\u4e0d\u662f OF\uff1f<\/h2>\n\n\n\n
\u7b2c 22 \u9898\u4ee3\u7801\u662f\uff1a<\/p>\n\n\n\n
int si = 65536;\nshort i = si;\nunsigned j = 0;\n\nif (i <= j - 1)\n    printf(\"\u738b\u9053\");\nelse\n    printf(\"\u8ba1\u7b97\u673a\u6559\u80b2\");\n<\/code><\/pre>\n\n\n\n
\u5148\u770b\uff1a<\/p>\n\n\n\n
short i = si;\n<\/code><\/pre>\n\n\n\n
\u5728\u8003\u7814\u5e38\u89c1\u8bbe\u5b9a\u4e2d\uff1a<\/p>\n\n\n\n
int      32 \u4f4d\nshort    16 \u4f4d\nunsigned 32 \u4f4d\n<\/code><\/pre>\n\n\n\n
65536<\/code> \u7684\u5341\u516d\u8fdb\u5236\u662f\uff1a<\/p>\n\n\n\n
65536 = 0x00010000\n<\/code><\/pre>\n\n\n\n
\u8d4b\u7ed9 16 \u4f4d short<\/code>\uff0c\u53ea\u4fdd\u7559\u4f4e 16 \u4f4d\uff1a<\/p>\n\n\n\n
0x00010000 \u7684\u4f4e 16 \u4f4d = 0x0000\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
i = 0\n<\/code><\/pre>\n\n\n\n
\u518d\u770b\uff1a<\/p>\n\n\n\n
unsigned j = 0;\n<\/code><\/pre>\n\n\n\n
\u90a3\u4e48\uff1a<\/p>\n\n\n\n
j - 1\n<\/code><\/pre>\n\n\n\n
\u4e0d\u662f\u6709\u7b26\u53f7\u7684 0 - 1 = -1<\/code>\uff0c\u800c\u662f\u65e0\u7b26\u53f7\u8fd0\u7b97\uff1a<\/p>\n\n\n\n
0u - 1u = UINT_MAX\n<\/code><\/pre>\n\n\n\n
\u5728 32 \u4f4d unsigned \u4e2d\uff1a<\/p>\n\n\n\n
UINT_MAX = 0xFFFFFFFF = 2\u00b3\u00b2 - 1\n<\/code><\/pre>\n\n\n\n
\u7136\u540e\u6bd4\u8f83\uff1a<\/p>\n\n\n\n
i <= j - 1\n<\/code><\/pre>\n\n\n\n
\u7531\u4e8e\u53f3\u8fb9\u662f unsigned<\/code>\uff0c\u5de6\u8fb9\u7684 i<\/code> \u4e5f\u4f1a\u88ab\u8f6c\u6362\u6210 unsigned<\/code>\u3002<\/p>\n\n\n\n
\u4e8e\u662f\u6bd4\u8f83\u53d8\u6210\uff1a<\/p>\n\n\n\n
0u <= 0xFFFFFFFFu\n<\/code><\/pre>\n\n\n\n
\u8fd9\u4e2a\u6761\u4ef6\u5f53\u7136\u6210\u7acb\uff0c\u6240\u4ee5\u8f93\u51fa\uff1a<\/p>\n\n\n\n
\u738b\u9053\n<\/code><\/pre>\n\n\n\n
\u56e0\u4e3a\u8fd9\u6b21\u6bd4\u8f83\u5df2\u7ecf\u53d8\u6210\u4e86\u65e0\u7b26\u53f7\u6bd4\u8f83<\/strong>\uff0c\u6240\u4ee5\u5224\u65ad\u6761\u4ef6\u4f9d\u8d56\u7684\u662f\u65e0\u7b26\u53f7\u6bd4\u8f83\u6807\u5fd7\uff0c\u4e5f\u5c31\u662f\u4e3b\u8981\u770b\uff1a<\/p>\n\n\n\n
CF\u3001ZF\n<\/code><\/pre>\n\n\n\n
\u800c\u9009\u9879\u91cc\u901a\u5e38\u628a\u65e0\u7b26\u53f7\u6bd4\u8f83\u5f52\u4e3a\uff1a<\/p>\n\n\n\n
CF\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u7b2c 22 \u9898\u9009\uff1a<\/p>\n\n\n\n
CF\uff0c\u738b\u9053\n<\/code><\/pre>\n\n\n\n
\u5341\u4e00\u3001\u7b2c 22 \u9898\u5982\u679c\u6309\u6709\u7b26\u53f7\u6bd4\u8f83\uff0c\u4f1a\u53d1\u751f\u4ec0\u4e48\uff1f<\/h2>\n\n\n\n
\u5982\u679c\u6ca1\u6709 unsigned j<\/code> \u8fd9\u4e2a\u9677\u9631\uff0c\u76f4\u89c9\u4e0a\u53ef\u80fd\u4f1a\u60f3\uff1a<\/p>\n\n\n\n
j = 0\nj - 1 = -1\ni = 0\n\n0 <= -1\n<\/code><\/pre>\n\n\n\n
\u8fd9\u5f53\u7136\u662f\u5047\u3002<\/p>\n\n\n\n
\u5982\u679c\u662f\u6709\u7b26\u53f7\u6bd4\u8f83\uff0c\u786e\u5b9e\u5e94\u8be5\u8f93\u51fa\uff1a<\/p>\n\n\n\n
\u8ba1\u7b97\u673a\u6559\u80b2\n<\/code><\/pre>\n\n\n\n
\u4f46\u95ee\u9898\u662f C \u8bed\u8a00\u91cc\uff0c\u53ea\u8981\u8868\u8fbe\u5f0f\u4e2d\u6df7\u5165\u4e86 unsigned<\/code>\uff0c\u5f88\u591a\u65f6\u5019\u53e6\u4e00\u4e2a\u6709\u7b26\u53f7\u6570\u4f1a\u88ab\u8f6c\u6362\u6210\u65e0\u7b26\u53f7\u6570\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u5b9e\u9645\u4e0d\u662f\u6bd4\u8f83\uff1a<\/p>\n\n\n\n
0 <= -1\n<\/code><\/pre>\n\n\n\n
\u800c\u662f\u6bd4\u8f83\uff1a<\/p>\n\n\n\n
0u <= 4294967295u\n<\/code><\/pre>\n\n\n\n
\u8fd9\u5c31\u662f\u771f\u3002<\/p>\n\n\n\n
\u8fd9\u9053\u9898\u7684\u672c\u8d28\u9677\u9631\u5c31\u662f\uff1a<\/p>\n\n\n\n
unsigned \u4f1a\u628a\u6574\u4e2a\u8868\u8fbe\u5f0f\u62c9\u5230\u65e0\u7b26\u53f7\u8bed\u5883\u4e2d\u3002\n<\/code><\/pre>\n\n\n\n
\u5341\u4e8c\u3001\u505a\u9898\u65f6\u600e\u4e48\u5feb\u901f\u5224\u65ad\u770b CF \u8fd8\u662f OF\uff1f<\/h2>\n\n\n\n
\u53ef\u4ee5\u76f4\u63a5\u6309\u7c7b\u578b\u5224\u65ad\u3002<\/p>\n\n\n\n
\u5982\u679c\u9898\u76ee\u8bf4\uff1a<\/p>\n\n\n\n
\u65e0\u7b26\u53f7\u6570\u52a0\u51cf\u3001\u65e0\u7b26\u53f7\u6570\u6bd4\u8f83\n<\/code><\/pre>\n\n\n\n
\u91cd\u70b9\u770b\uff1a<\/p>\n\n\n\n
CF\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u9898\u76ee\u8bf4\uff1a<\/p>\n\n\n\n
\u8865\u7801\u3001\u6709\u7b26\u53f7\u6574\u6570\u3001int\u3001short\u3001signed\n<\/code><\/pre>\n\n\n\n
\u91cd\u70b9\u770b\uff1a<\/p>\n\n\n\n
OF\n<\/code><\/pre>\n\n\n\n
\u4f46 C \u8bed\u8a00\u9898\u8981\u7279\u522b\u6ce8\u610f\uff1a\u53d8\u91cf\u58f0\u660e\u91cc\u53ea\u8981\u51fa\u73b0 unsigned<\/code>\uff0c\u8868\u8fbe\u5f0f\u53ef\u80fd\u88ab\u8f6c\u6362\u6210\u65e0\u7b26\u53f7\u8fd0\u7b97\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u7b2c 22 \u9898\u867d\u7136\u6709 short i<\/code>\uff0c\u4f46\u53f3\u8fb9\u6709\uff1a<\/p>\n\n\n\n
unsigned j\n<\/code><\/pre>\n\n\n\n
\u4e8e\u662f\u6574\u4e2a\u6bd4\u8f83\u8f6c\u4e3a\u65e0\u7b26\u53f7\u6bd4\u8f83\uff0c\u770b CF<\/code>\uff0c\u4e0d\u662f\u770b OF<\/code>\u3002<\/p>\n\n\n\n
\u53ef\u4ee5\u6574\u7406\u6210\u4e00\u53e5\u8003\u8bd5\u7528\u5224\u65ad\uff1a<\/p>\n\n\n\n
CF \u7ba1\u65e0\u7b26\u53f7\u8fdb\u4f4d\/\u501f\u4f4d\uff0cOF \u7ba1\u6709\u7b26\u53f7\u8865\u7801\u6ea2\u51fa\u3002\n<\/code><\/pre>\n\n\n\n
\u518d\u7ec6\u4e00\u70b9\uff1a<\/p>\n\n\n\n
\u65e0\u7b26\u53f7\u6570\uff1a\u8303\u56f4\u662f 0 ~ 2\u207f - 1\uff0c\u8d85\u4e86\u770b CF\u3002\n\u6709\u7b26\u53f7\u8865\u7801\uff1a\u8303\u56f4\u662f -2\u207f\u207b\u00b9 ~ 2\u207f\u207b\u00b9 - 1\uff0c\u8d85\u4e86\u770b OF\u3002\n<\/code><\/pre>\n\n\n\n
\u5341\u4e09\u3001\u56de\u5230\u4f60\u7684\u7591\u95ee\uff1a\u6ea2\u51fa\u65f6\u5230\u5e95\u8f93\u51fa\u4ec0\u4e48\uff1f<\/h2>\n\n\n\n
\u6700\u540e\u518d\u628a\u8fd9\u4e2a\u70b9\u538b\u5b9e\u3002<\/p>\n\n\n\n
\u4ee5 8 \u4f4d\u8865\u7801\u4e3a\u4f8b\uff0c\u673a\u5668\u8fd0\u7b97\u6c38\u8fdc\u8f93\u51fa 8 \u4f4d\u7ed3\u679c\uff1a<\/p>\n\n\n\n
44H + 48H = 8CH\n<\/code><\/pre>\n\n\n\n
\u4ece\u4e8c\u8fdb\u5236\u770b\uff1a<\/p>\n\n\n\n
0100 0100 + 0100 1000 = 1000 1100\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u5bc4\u5b58\u5668\u91cc\u5c31\u662f\uff1a<\/p>\n\n\n\n
1000 1100\n<\/code><\/pre>\n\n\n\n
\u4e5f\u5c31\u662f\uff1a<\/p>\n\n\n\n
8CH\n<\/code><\/pre>\n\n\n\n
\u4f46\u56e0\u4e3a\u8fd9\u662f\u4e24\u4e2a\u6b63\u6570\u76f8\u52a0\u5374\u5f97\u5230\u8d1f\u53f7\u4f4d\uff0c\u6240\u4ee5\uff1a<\/p>\n\n\n\n
OF = 1\n<\/code><\/pre>\n\n\n\n
\u56e0\u6b64\uff1a<\/p>\n\n\n\n
\u673a\u5668\u8f93\u51fa\uff1a8CH\n\u662f\u5426\u53ef\u4fe1\uff1a\u4f5c\u4e3a\u6709\u7b26\u53f7\u8865\u7801\u7ed3\u679c\u4e0d\u53ef\u4fe1\n\u771f\u5b9e\u6570\u5b66\u7ed3\u679c\uff1a140\n\u6ea2\u51fa\u539f\u56e0\uff1a140 \u8d85\u8fc7 8 \u4f4d\u8865\u7801\u6700\u5927\u503c 127\n<\/code><\/pre>\n\n\n\n
\u505a\u8865\u7801\u6ea2\u51fa\u9898\u65f6\uff0c\u4e00\u5b9a\u8981\u628a\u8fd9\u4e09\u4ef6\u4e8b\u5206\u5f00\uff1a<\/p>\n\n\n\n
1. \u673a\u5668\u4f4d\u5f62\u7ed3\u679c\u662f\u591a\u5c11\uff1f\n2. \u8fd9\u4e2a\u7ed3\u679c\u6309\u8865\u7801\u89e3\u91ca\u6210\u4ec0\u4e48\u771f\u503c\uff1f\n3. \u771f\u5b9e\u6570\u5b66\u7ed3\u679c\u662f\u5426\u8d85\u51fa\u8865\u7801\u8868\u793a\u8303\u56f4\uff1f\n<\/code><\/pre>\n\n\n\n
\u7b2c 21 \u9898\u5c31\u662f\u6700\u5178\u578b\u7684\u4f8b\u5b50\uff1a<\/p>\n\n\n\n
\u673a\u5668\u4f4d\u5f62\u7ed3\u679c\uff1a8CH\n\u6309 8 \u4f4d\u8865\u7801\u89e3\u91ca\uff1a-116\n\u771f\u5b9e\u6570\u5b66\u7ed3\u679c\uff1a+140\n\u56e0\u4e3a\u771f\u5b9e\u7ed3\u679c\u65e0\u6cd5\u7528 8 \u4f4d\u8865\u7801\u8868\u793a\uff0c\u6240\u4ee5 OF = 1\n<\/code><\/pre>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\u672c\u9898\u5e94\u9009 C<\/strong>\u3002<\/p>\n\n\n\n
\u8fd9\u5f20\u56fe\u8003\u7684\u662f 32 \u4f4d\u8865\u7801\u4e00\u4f4d\u4e58\u6cd5\u5668<\/strong>\uff0c\u672c\u8d28\u4e0a\u5bf9\u5e94\u8003\u7814\u91cc\u5e38\u8bf4\u7684 Booth \u4e00\u4f4d\u4e58\u6cd5\u601d\u60f3<\/strong>\u3002\u5b83\u4e0d\u662f\u666e\u901a\u65e0\u7b26\u53f7\u79fb\u4f4d\u52a0\u6cd5\u4e58\u6cd5\uff0c\u800c\u662f\u9488\u5bf9\u8865\u7801\u6709\u7b26\u53f7\u6570\u8bbe\u8ba1\u7684\u4e58\u6cd5\u903b\u8f91\u3002<\/p>\n\n\n\n
\u56fe\u4e2d\u7ed3\u6784\u5927\u81f4\u53ef\u4ee5\u8fd9\u6837\u8bfb\uff1a<\/p>\n\n\n\n
\u88ab\u4e58\u6570\u653e\u5728\u5bc4\u5b58\u5668 X<\/code> \u4e2d\uff0c\u4f4d\u6570\u4e3a 32 \u4f4d\uff1b\u90e8\u5206\u79ef\u653e\u5728 P<\/code> \u4e2d\uff0c\u4e58\u6570\u653e\u5728 Y<\/code> \u4e2d\uff0cP | Y<\/code> \u5408\u8d77\u6765\u6784\u6210 64 \u4f4d\u5bc4\u5b58\u5668\uff1bALU \u662f 32 \u4f4d\u7684\uff0c\u6bcf\u6b21\u53ea\u5bf9\u90e8\u5206\u79ef P<\/code> \u548c\u88ab\u4e58\u6570 X<\/code> \u505a\u52a0\u6cd5\u6216\u51cf\u6cd5\uff1b\u63a7\u5236\u903b\u8f91\u6839\u636e\u4e58\u6570\u672b\u4f4d\u53ca\u9644\u52a0\u4f4d\u5224\u65ad\u672c\u8f6e\u6267\u884c +X<\/code>\u3001-X<\/code>\uff0c\u8fd8\u662f\u4e0d\u64cd\u4f5c\uff0c\u7136\u540e\u518d\u8ba9 P | Y<\/code> \u6574\u4f53\u53f3\u79fb\u4e00\u4f4d\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u91cd\u590d 32 \u6b21\u3002<\/p>\n\n\n\n
Booth \u4e00\u4f4d\u4e58\u6cd5\u7684\u57fa\u672c\u89c4\u5219\u662f\u770b\u5f53\u524d\u4e58\u6570\u6700\u4f4e\u4f4d\u548c\u9644\u52a0\u4f4d\uff0c\u5e38\u5199\u6210\uff1a<\/p>\n\n\n\n
Y0 Y-1 = 00 \uff1a\u4e0d\u64cd\u4f5c\nY0 Y-1 = 01 \uff1aP = P + X\nY0 Y-1 = 10 \uff1aP = P - X\nY0 Y-1 = 11 \uff1a\u4e0d\u64cd\u4f5c\n\u7136\u540e P\u3001Y\u3001Y-1 \u6574\u4f53\u7b97\u672f\u53f3\u79fb\u4e00\u4f4d\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u9010\u9879\u5224\u65ad\u5982\u4e0b\u3002<\/p>\n\n\n\n
A \u9879\u8bf4\u201c32 \u4f4d\u65e0\u7b26\u53f7\u6574\u6570\u7684\u4e58\u6cd5\u7535\u8def\u548c\u8be5\u56fe\u6ca1\u6709\u533a\u522b\u201d\uff0c\u8fd9\u662f\u9519\u8bef\u7684\u3002\u65e0\u7b26\u53f7\u4e00\u4f4d\u4e58\u6cd5\u901a\u5e38\u53ea\u9700\u8981\u6839\u636e\u4e58\u6570\u4f4d\u5224\u65ad\u662f\u5426\u52a0\u88ab\u4e58\u6570\uff0c\u4e0d\u9700\u8981\u6839\u636e\u76f8\u90bb\u4e24\u4f4d\u5224\u65ad\u52a0\u6cd5\u6216\u51cf\u6cd5\uff0c\u4e5f\u4e0d\u9700\u8981\u4e3a\u4e86\u8865\u7801\u7b26\u53f7\u4fdd\u6301\u800c\u8fdb\u884c\u7b97\u672f\u53f3\u79fb\u3002\u8be5\u56fe\u4e2d\u660e\u663e\u6709\u201c\u52a0\/\u51cf\u201d\u63a7\u5236\u4fe1\u53f7\uff0c\u8bf4\u660e\u5b83\u4e0d\u662f\u666e\u901a\u65e0\u7b26\u53f7\u4e58\u6cd5\u5668\uff0c\u800c\u662f\u8865\u7801\u4e58\u6cd5\u5668\u3002<\/p>\n\n\n\n
B \u9879\u8bf4\u201c\u6267\u884c\u8fc7\u7a0b\u4e2d ALU \u8981\u4e48\u505a\u52a0\u6cd5\uff0c\u8981\u4e48\u505a\u51cf\u6cd5\uff0c\u4e0d\u53ef\u80fd\u6267\u884c\u7a7a\u64cd\u4f5c\u201d\uff0c\u8fd9\u662f\u9519\u8bef\u7684\u3002Booth \u4e00\u4f4d\u4e58\u6cd5\u4e2d\uff0c\u5f53\u5224\u65ad\u4f4d\u7ec4\u5408\u4e3a 00<\/code> \u6216 11<\/code> \u65f6\uff0c\u672c\u8f6e\u4e0d\u9700\u8981\u5bf9\u90e8\u5206\u79ef\u52a0\u51cf\u88ab\u4e58\u6570\uff0c\u4e5f\u5c31\u662f\u53ef\u4ee5\u7a7a\u64cd\u4f5c\u3002\u53ea\u6709 01<\/code> \u65f6\u52a0\uff0c10<\/code> \u65f6\u51cf\u3002<\/p>\n\n\n\n
C \u9879\u8bf4\u201c\u56fe\u4e2d\u7684\u4e58\u79ef\u5bc4\u5b58\u5668 P \u548c\u4e58\u6570\u5bc4\u5b58\u5668 Y \u6240\u6267\u884c\u7684\u53f3\u79fb\u662f\u7b97\u672f\u53f3\u79fb\u201d\uff0c\u8fd9\u662f\u6b63\u786e\u7684\u3002\u56e0\u4e3a\u8fd9\u662f\u8865\u7801\u4e58\u6cd5\uff0c\u53f3\u79fb\u65f6\u5fc5\u987b\u4fdd\u6301\u7b26\u53f7\u4f4d\u3002\u66f4\u51c6\u786e\u5730\u8bf4\uff0c\u662f P\u3001Y<\/code> \u4ee5\u53ca\u9644\u52a0\u4f4d\u6574\u4f53\u6784\u6210\u7684\u79fb\u4f4d\u5bc4\u5b58\u5668\u505a\u7b97\u672f\u53f3\u79fb\uff0c\u6700\u9ad8\u4f4d\u8865 P<\/code> \u7684\u7b26\u53f7\u4f4d\uff0c\u4e0d\u80fd\u505a\u903b\u8f91\u53f3\u79fb\u3002\u5982\u679c\u903b\u8f91\u53f3\u79fb\uff0c\u9ad8\u4f4d\u8865 0\uff0c\u4f1a\u7834\u574f\u8d1f\u6570\u7684\u7b26\u53f7\u6269\u5c55\uff0c\u7ed3\u679c\u5c31\u4e0d\u518d\u662f\u6b63\u786e\u7684\u8865\u7801\u4e58\u6cd5\u3002<\/p>\n\n\n\n
D \u9879\u8bf4\u201c\u8ba1\u7b97\u5b8c\u6210\u540e\uff0c\u82e5\u4e58\u79ef\u5bc4\u5b58\u5668 P \u4e2d\u7684\u503c\u4e0d\u5168\u4e3a 0\uff0c\u5219\u53d1\u751f\u6ea2\u51fa\u201d\uff0c\u8fd9\u662f\u9519\u8bef\u7684\u3002\u4e24\u4e2a 32 \u4f4d\u8865\u7801\u6570\u76f8\u4e58\uff0c\u5b8c\u6574\u7ed3\u679c\u662f 64 \u4f4d\uff0c\u653e\u5728 P | Y<\/code> \u4e2d\uff0c\u6b63\u5e38\u60c5\u51b5\u4e0b\u5e76\u4e0d\u5b58\u5728 64 \u4f4d\u7ed3\u679c\u6ea2\u51fa\u7684\u95ee\u9898\u3002\u5982\u679c\u9898\u76ee\u8981\u6c42\u53ea\u4fdd\u7559\u4f4e 32 \u4f4d\uff0c\u90a3\u4e48\u5224\u65ad\u6ea2\u51fa\u4e5f\u4e0d\u80fd\u7b80\u5355\u770b P<\/code> \u662f\u5426\u5168\u4e3a 0\u3002\u5bf9\u4e8e\u6709\u7b26\u53f7\u8865\u7801\u4e58\u6cd5\uff0c\u82e5\u6700\u7ec8 64 \u4f4d\u7ed3\u679c\u80fd\u591f\u88ab\u4f4e 32 \u4f4d\u6b63\u786e\u7b26\u53f7\u6269\u5c55\u8868\u793a\uff0c\u624d\u4e0d\u6ea2\u51fa\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u9ad8 32 \u4f4d P<\/code> \u5e94\u8be5\u662f\u4f4e 32 \u4f4d Y<\/code> \u7b26\u53f7\u4f4d\u7684\u6269\u5c55\uff1a<\/p>\n\n\n\n
\u82e5 Y \u7684\u6700\u9ad8\u4f4d\u4e3a 0\uff0c\u5219 P \u5e94\u5168\u4e3a 0\n\u82e5 Y \u7684\u6700\u9ad8\u4f4d\u4e3a 1\uff0c\u5219 P \u5e94\u5168\u4e3a 1\n<\/code><\/pre>\n\n\n\n
\u4f8b\u5982\u8d1f\u6570\u4e58\u79ef\u7684\u9ad8\u4f4d\u53ef\u80fd\u5168\u4e3a 1\uff0c\u8fd9\u4e0d\u4ee3\u8868\u6ea2\u51fa\uff1b\u6240\u4ee5 D \u9879\u628a\u65e0\u7b26\u53f7\u4e58\u6cd5\u7684\u90e8\u5206\u5224\u65ad\u601d\u8def\u9519\u8bef\u5957\u5230\u4e86\u8865\u7801\u6709\u7b26\u53f7\u4e58\u6cd5\u4e0a\u3002<\/p>\n\n\n\n
\u56e0\u6b64\u672c\u9898\u7ed3\u8bba\u662f\uff1a<\/p>\n\n\n\n
A \u9519\nB \u9519\nC \u5bf9\nD \u9519\n\n\u6b63\u786e\u7b54\u6848\uff1aC\n<\/code><\/pre>\n\n\n\n
\u8fd9\u7c7b\u9898\u7684\u5feb\u901f\u8bc6\u522b\u65b9\u6cd5\u662f\uff1a\u53ea\u8981\u770b\u5230 \u8865\u7801\u4e00\u4f4d\u4e58\u6cd5 + \u52a0\/\u51cf\u63a7\u5236 + P\u3001Y \u6574\u4f53\u53f3\u79fb + \u9644\u52a0\u5224\u65ad\u4f4d<\/strong>\uff0c\u57fa\u672c\u5c31\u662f Booth \u4e58\u6cd5\u3002\u8003\u70b9\u901a\u5e38\u96c6\u4e2d\u5728\u4e09\u4e2a\u5730\u65b9\uff1a\u7b2c\u4e00\uff0cALU \u4e0d\u4e00\u5b9a\u6bcf\u8f6e\u90fd\u52a0\u51cf\uff0c\u53ef\u80fd\u7a7a\u64cd\u4f5c\uff1b\u7b2c\u4e8c\uff0c\u8865\u7801\u4e58\u6cd5\u53f3\u79fb\u5fc5\u987b\u662f\u7b97\u672f\u53f3\u79fb\uff1b\u7b2c\u4e09\uff0c\u6ea2\u51fa\u5224\u65ad\u4e0d\u80fd\u7b80\u5355\u770b\u9ad8\u4f4d\u662f\u5426\u975e 0\uff0c\u800c\u8981\u770b\u9ad8\u4f4d\u662f\u5426\u4e3a\u4f4e\u4f4d\u7b26\u53f7\u4f4d\u7684\u6b63\u786e\u6269\u5c55\u3002<\/p>\n\n\n\n
\u5bf9\u4e8e\u8fd9\u79cd\u7c7b\u578b\u7684\u9898\u76ee \uff0c\u8fd9\u4e2a\u7ed3\u6784\u6211\u4eec\u662f\u5426\u9700\u8981\u719f\u8bb0\u5462\uff1f\u5b83\u6d89\u53ca\u5230\u54ea\u4e9b\u77e5\u8bc6 \uff0c\uff0c\u672c\u8d28\u4e0a\u8003\u7684\u662f\u4ec0\u4e48\u4e1c\u897f\uff1f<\/h2>\n\n\n\n
\u8fd9\u79cd\u9898\u4e0d\u9700\u8981\u628a\u6574\u5f20\u903b\u8f91\u7ed3\u6784\u56fe\u4e00\u7b14\u4e00\u753b\u80cc\u4e0b\u6765\uff0c\u4f46\u9700\u8981\u719f\u8bb0\u5b83\u80cc\u540e\u7684\u201c\u7ed3\u6784\u6a21\u677f\u201d\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u4e0d\u8981\u6c42\u8bb0\u4f4f\u6bcf\u6839\u7ebf\u600e\u4e48\u8fde\u3001\u65b9\u6846\u4f4d\u7f6e\u600e\u4e48\u6446\uff0c\u4f46\u5fc5\u987b\u770b\u5230 X\u3001P\u3001Y\u3001ALU\u3001\u53f3\u79fb\u3001\u8ba1\u6570\u5668\u3001\u63a7\u5236\u903b\u8f91<\/code> \u8fd9\u4e9b\u90e8\u4ef6\u65f6\uff0c\u80fd\u7acb\u523b\u5224\u65ad\u51fa\uff1a\u8fd9\u662f \u8865\u7801\u4e00\u4f4d\u4e58\u6cd5\uff0c\u4e5f\u5c31\u662f Booth \u4e58\u6cd5\u7684\u786c\u4ef6\u5b9e\u73b0<\/strong>\u3002<\/p>\n\n\n\n
\u5b83\u672c\u8d28\u4e0a\u4e0d\u662f\u5728\u8003\u753b\u56fe\uff0c\u800c\u662f\u5728\u8003\uff1a\u8865\u7801\u4e58\u6cd5\u7b97\u6cd5\u5982\u4f55\u6620\u5c04\u6210\u786c\u4ef6\u6570\u636e\u901a\u8def\u548c\u63a7\u5236\u903b\u8f91<\/strong>\u3002<\/p>\n\n\n\n
\n\n\n\n
\u4e00\u3001\u8fd9\u79cd\u7ed3\u6784\u8981\u4e0d\u8981\u719f\u8bb0\uff1f<\/h2>\n\n\n\n
\u8981\u719f\uff0c\u4f46\u4e0d\u662f\u6b7b\u80cc\u56fe\u5f62\uff0c\u800c\u662f\u719f\u8bb0\u5b83\u7684\u51e0\u4e2a\u5173\u952e\u90e8\u4ef6\u548c\u4f5c\u7528\u3002<\/p>\n\n\n\n
\u5bf9\u4e8e 32 \u4f4d\u8865\u7801\u4e00\u4f4d\u4e58\u6cd5\u5668\uff0c\u53ef\u4ee5\u628a\u7ed3\u6784\u538b\u7f29\u6210\u4e0b\u9762\u8fd9\u4e2a\u6a21\u578b\uff1a<\/p>\n\n\n\n
X\uff1a\u88ab\u4e58\u6570\u5bc4\u5b58\u5668\uff0c\u5b58\u653e\u88ab\u4e58\u6570\nP\uff1a\u4e58\u79ef\u9ad8\u4f4d \/ \u90e8\u5206\u79ef\u5bc4\u5b58\u5668\uff0c32 \u4f4d\nY\uff1a\u4e58\u6570\u5bc4\u5b58\u5668\uff0c32 \u4f4d\nP | Y\uff1a\u5408\u8d77\u6765\u6784\u6210 64 \u4f4d\u4e58\u79ef\u5bc4\u5b58\u5668\nALU\uff1a\u5bf9 P \u548c X \u505a\u52a0\u6cd5\u6216\u51cf\u6cd5\n\u63a7\u5236\u903b\u8f91\uff1a\u6839\u636e Y \u7684\u6700\u4f4e\u4f4d\u548c\u9644\u52a0\u4f4d\u5224\u65ad\u52a0\u3001\u51cf\u6216\u4e0d\u64cd\u4f5c\n\u8ba1\u6570\u5668\uff1a\u63a7\u5236\u5faa\u73af\u6b21\u6570\uff0c32 \u4f4d\u4e58\u6cd5\u505a 32 \u6b21\n\u53f3\u79fb\u903b\u8f91\uff1a\u6bcf\u8f6e\u4e4b\u540e P\u3001Y \u548c\u9644\u52a0\u4f4d\u6574\u4f53\u53f3\u79fb\u4e00\u4f4d\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u4ece\u505a\u9898\u89d2\u5ea6\u538b\u7f29\u8bb0\u5fc6\uff0c\u53ef\u4ee5\u8bb0\u6210\u4e00\u53e5\u8bdd\uff1a<\/p>\n\n\n\n
\u8865\u7801\u4e00\u4f4d\u4e58\u6cd5 = P \u4e0e X \u52a0\/\u51cf + P\u3001Y\u3001\u9644\u52a0\u4f4d\u6574\u4f53\u7b97\u672f\u53f3\u79fb + \u505a n \u8f6e\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u7ed3\u6784\u56fe\u4e0d\u7528\u5b8c\u6574\u80cc\uff0c\u4f46\u5fc5\u987b\u8bb0\u4f4f\u8fd9\u51e0\u4e2a\u4e0d\u53d8\u91cf\uff1a<\/p>\n\n\n\n
\u7b2c\u4e00\uff0cX<\/code> \u662f\u88ab\u4e58\u6570\u5bc4\u5b58\u5668\uff0c\u4e0d\u53c2\u4e0e\u53f3\u79fb\u3002<\/p>\n\n\n\n
\u7b2c\u4e8c\uff0cP<\/code> \u662f\u90e8\u5206\u79ef\u5bc4\u5b58\u5668\uff0c\u8981\u548c X<\/code> \u9001\u5165 ALU \u505a\u52a0\u51cf\u3002<\/p>\n\n\n\n
\u7b2c\u4e09\uff0cY<\/code> \u662f\u4e58\u6570\u5bc4\u5b58\u5668\uff0c\u4f1a\u548c P<\/code> \u4e00\u8d77\u53f3\u79fb\u3002<\/p>\n\n\n\n
\u7b2c\u56db\uff0c\u63a7\u5236\u903b\u8f91\u4e0d\u662f\u53ea\u770b\u4e00\u4f4d\uff0c\u800c\u662f\u770b Y0<\/code> \u548c\u9644\u52a0\u4f4d Y-1<\/code>\u3002<\/p>\n\n\n\n
\u7b2c\u4e94\uff0c\u6bcf\u8f6e\u53ef\u80fd\u52a0\u3001\u53ef\u80fd\u51cf\u3001\u4e5f\u53ef\u80fd\u4ec0\u4e48\u90fd\u4e0d\u505a\u3002<\/p>\n\n\n\n
\u7b2c\u516d\uff0c\u8865\u7801\u4e58\u6cd5\u53f3\u79fb\u5fc5\u987b\u662f\u7b97\u672f\u53f3\u79fb\uff0c\u800c\u4e0d\u662f\u903b\u8f91\u53f3\u79fb\u3002<\/p>\n\n\n\n
\u8fd9\u51e0\u4e2a\u70b9\u719f\u4e86\uff0c\u56fe\u5f62\u600e\u4e48\u53d8\u90fd\u80fd\u505a\u3002<\/p>\n\n\n\n
\n\n\n\n
\u4e8c\u3001\u5b83\u6d89\u53ca\u54ea\u4e9b\u77e5\u8bc6\u70b9\uff1f<\/h2>\n\n\n\n
\u8fd9\u7c7b\u9898\u770b\u8d77\u6765\u662f\u201c\u4e58\u6cd5\u5668\u7ed3\u6784\u201d\uff0c\u4f46\u5176\u5b9e\u540c\u65f6\u4e32\u4e86\u56db\u5757\u5185\u5bb9\u3002<\/p>\n\n\n\n
\u7b2c\u4e00\u5757\u662f \u8865\u7801\u8868\u793a\u4e0e\u8865\u7801\u52a0\u51cf\u6cd5<\/strong>\u3002\u56e0\u4e3a\u88ab\u4e58\u6570\u548c\u4e58\u6570\u90fd\u662f\u8865\u7801\u5f62\u5f0f\uff0c\u6240\u4ee5\u786c\u4ef6\u91cc\u4e0d\u9700\u8981\u5355\u72ec\u5224\u65ad\u6b63\u8d1f\u53f7\u518d\u53d6\u7edd\u5bf9\u503c\uff0c\u800c\u662f\u76f4\u63a5\u7528\u8865\u7801\u52a0\u51cf\u5b8c\u6210\u4e58\u6cd5\u3002\u8fd9\u4e5f\u662f Booth \u4e58\u6cd5\u80fd\u76f4\u63a5\u5904\u7406\u6709\u7b26\u53f7\u6570\u7684\u539f\u56e0\u3002<\/p>\n\n\n\n
\u7b2c\u4e8c\u5757\u662f \u5b9a\u70b9\u4e58\u6cd5\u7b97\u6cd5<\/strong>\u3002\u8003\u7814\u91cc\u5e38\u89c1\u7684\u4e58\u6cd5\u6709\u65e0\u7b26\u53f7\u4e58\u6cd5\u3001\u539f\u7801\u4e00\u4f4d\u4e58\u6cd5\u3001\u8865\u7801\u4e00\u4f4d\u4e58\u6cd5\u3002\u5b83\u4eec\u7684\u5171\u540c\u70b9\u662f\u201c\u9010\u4f4d\u5904\u7406\u4e58\u6570\uff0c\u6bcf\u8f6e\u79fb\u4f4d\u201d\uff0c\u533a\u522b\u5728\u4e8e\u662f\u5426\u9700\u8981\u51cf\u6cd5\u3001\u53f3\u79fb\u65b9\u5f0f\u3001\u7b26\u53f7\u5982\u4f55\u5904\u7406\u3002<\/p>\n\n\n\n
\u7b2c\u4e09\u5757\u662f \u6570\u636e\u901a\u8def\u7ed3\u6784<\/strong>\u3002\u4e5f\u5c31\u662f\u5bc4\u5b58\u5668\u3001ALU\u3001\u79fb\u4f4d\u5668\u3001\u63a7\u5236\u903b\u8f91\u3001\u8ba1\u6570\u5668\u4e4b\u95f4\u5982\u4f55\u914d\u5408\u3002\u9898\u76ee\u7ed9\u56fe\u65f6\uff0c\u901a\u5e38\u4e0d\u662f\u8ba9\u4f60\u8bbe\u8ba1\u7535\u8def\uff0c\u800c\u662f\u8ba9\u4f60\u5224\u65ad\u56fe\u4e2d\u67d0\u4e2a\u90e8\u4ef6\u7684\u529f\u80fd\u6216\u67d0\u4e2a\u9009\u9879\u7684\u8bf4\u6cd5\u662f\u5426\u6b63\u786e\u3002<\/p>\n\n\n\n
\u7b2c\u56db\u5757\u662f \u6ea2\u51fa\u4e0e\u7ed3\u679c\u4f4d\u6570<\/strong>\u3002\u4e24\u4e2a 32 \u4f4d\u6570\u76f8\u4e58\uff0c\u5b8c\u6574\u4e58\u79ef\u9700\u8981 64 \u4f4d\u4fdd\u5b58\u3002\u82e5\u9898\u76ee\u9ed8\u8ba4\u7ed3\u679c\u5b58\u5728 P | Y<\/code> \u8fd9\u4e2a 64 \u4f4d\u5bc4\u5b58\u5668\u4e2d\uff0c\u4e00\u822c\u4e0d\u6309 32 \u4f4d\u7ed3\u679c\u5224\u65ad\u6ea2\u51fa\u3002\u5982\u679c\u9898\u76ee\u8981\u6c42\u53ea\u4fdd\u7559 32 \u4f4d\u7ed3\u679c\uff0c\u5219\u6709\u7b26\u53f7\u4e58\u6cd5\u7684\u6ea2\u51fa\u5224\u65ad\u8981\u770b\u9ad8 32 \u4f4d\u662f\u5426\u662f\u4f4e 32 \u4f4d\u7b26\u53f7\u4f4d\u7684\u6269\u5c55\uff0c\u800c\u4e0d\u662f\u7b80\u5355\u770b\u9ad8 32 \u4f4d\u662f\u5426\u5168 0\u3002<\/p>\n\n\n\n
\n\n\n\n
\u4e09\u3001\u8865\u7801\u4e00\u4f4d\u4e58\u6cd5\u7684\u6838\u5fc3\u89c4\u5219<\/h2>\n\n\n\n
\u8865\u7801\u4e00\u4f4d\u4e58\u6cd5\uff0c\u4e5f\u5c31\u662f Booth \u4e00\u4f4d\u4e58\u6cd5\uff0c\u6700\u6838\u5fc3\u7684\u63a7\u5236\u89c4\u5219\u662f\u770b Y0<\/code> \u548c\u9644\u52a0\u4f4d Y-1<\/code>\u3002<\/p>\n\n\n\n
\u8bbe Y0<\/code> \u662f\u4e58\u6570\u5bc4\u5b58\u5668\u5f53\u524d\u6700\u4f4e\u4f4d\uff0cY-1<\/code> \u662f\u9644\u52a0\u4f4d\uff0c\u521d\u59cb\u4e3a 0\u3002<\/p>\n\n\n\n
Y0 Y-1 = 00 \uff1aP \u4e0d\u53d8\nY0 Y-1 = 01 \uff1aP = P + X\nY0 Y-1 = 10 \uff1aP = P - X\nY0 Y-1 = 11 \uff1aP \u4e0d\u53d8\n\u7136\u540e P\u3001Y\u3001Y-1 \u6574\u4f53\u7b97\u672f\u53f3\u79fb\u4e00\u4f4d\n<\/code><\/pre>\n\n\n\n
\u8fd9\u5f20\u56fe\u91cc\u7684\u201c\u52a0\/\u51cf\u201d\u63a7\u5236\u4fe1\u53f7\uff0c\u5c31\u662f\u4e3a\u4e86\u5b9e\u73b0 P + X<\/code> \u6216 P - X<\/code>\u3002\u5982\u679c\u53ea\u662f\u666e\u901a\u65e0\u7b26\u53f7\u4e58\u6cd5\uff0c\u4e00\u822c\u53ea\u9700\u8981\u6839\u636e\u4e58\u6570\u4f4d\u51b3\u5b9a\u662f\u5426\u52a0\u88ab\u4e58\u6570\uff0c\u4e0d\u9700\u8981\u8fd9\u79cd Booth \u5f0f\u7684\u52a0\u51cf\u5224\u65ad\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u770b\u5230\u56fe\u4e2d\u6709 \u52a0\/\u51cf\u63a7\u5236<\/strong>\uff0c\u5c31\u8981\u8b66\u89c9\uff1a\u8fd9\u4e0d\u662f\u666e\u901a\u65e0\u7b26\u53f7\u4e58\u6cd5\uff0c\u800c\u662f\u8865\u7801 Booth \u4e58\u6cd5\u3002<\/p>\n\n\n\n
\n\n\n\n
\u56db\u3001\u8fd9\u79cd\u9898\u53ef\u4ee5\u76f4\u63a5\u5957\u7528\u4ec0\u4e48\u65b9\u6cd5\uff1f<\/h2>\n\n\n\n
\u505a\u8fd9\u79cd\u7ed3\u6784\u5224\u65ad\u9898\uff0c\u53ef\u4ee5\u76f4\u63a5\u5957\u4e00\u4e2a\u56db\u6b65\u6cd5\u3002<\/p>\n\n\n\n
\u7b2c\u4e00\u6b65\uff1a\u5148\u5224\u65ad\u662f\u54ea\u79cd\u4e58\u6cd5\u5668<\/h3>\n\n\n\n
\u770b\u9898\u5e72\u5173\u952e\u8bcd\u3002<\/p>\n\n\n\n
\u5982\u679c\u9898\u5e72\u8bf4\u201c\u8865\u7801\u4e00\u4f4d\u4e58\u6cd5\u201d\uff0c\u5e76\u4e14\u56fe\u4e2d\u6709 \u52a0\/\u51cf<\/code> \u63a7\u5236\uff0c\u90a3\u4e48\u57fa\u672c\u5c31\u662f Booth \u4e58\u6cd5\u3002<\/p>\n\n\n\n
\u5982\u679c\u9898\u5e72\u8bf4\u201c\u65e0\u7b26\u53f7\u4e58\u6cd5\u201d\u6216\u53ea\u6839\u636e\u4e58\u6570\u4f4d\u5224\u65ad\u662f\u5426\u52a0\u88ab\u4e58\u6570\uff0c\u4e00\u822c\u662f\u666e\u901a\u79fb\u4f4d\u52a0\u6cd5\u4e58\u6cd5\u3002<\/p>\n\n\n\n
\u5982\u679c\u9898\u5e72\u8bf4\u201c\u539f\u7801\u4e00\u4f4d\u4e58\u6cd5\u201d\uff0c\u901a\u5e38\u662f\u5148\u5904\u7406\u7b26\u53f7\u4f4d\uff0c\u6570\u503c\u90e8\u5206\u6309\u7edd\u5bf9\u503c\u505a\u4e58\u6cd5\uff0c\u7b26\u53f7\u5355\u72ec\u786e\u5b9a\u3002<\/p>\n\n\n\n
\u672c\u9898\u660e\u786e\u8bf4\u201c32 \u4f4d\u8865\u7801\u4e00\u4f4d\u4e58\u6cd5\u201d\uff0c\u6240\u4ee5\u7b97\u6cd5\u5b9a\u4f4d\u5c31\u662f Booth \u4e58\u6cd5\u3002<\/p>\n\n\n\n
\n\n\n\n
\u7b2c\u4e8c\u6b65\uff1a\u8bc6\u522b\u5bc4\u5b58\u5668\u5206\u5de5<\/h3>\n\n\n\n
\u8fd9\u4e00\u6b65\u662f\u9632\u6b62\u9009\u9879\u5077\u6362\u6982\u5ff5\u3002<\/p>\n\n\n\n
X<\/code> \u662f\u88ab\u4e58\u6570\u5bc4\u5b58\u5668\uff0c\u901a\u5e38\u4fdd\u6301\u4e0d\u52a8\u3002<\/p>\n\n\n\n
Y<\/code> \u662f\u4e58\u6570\u5bc4\u5b58\u5668\uff0c\u4f1a\u53f3\u79fb\u3002<\/p>\n\n\n\n
P<\/code> \u662f\u90e8\u5206\u79ef\u5bc4\u5b58\u5668\uff0c\u548c Y<\/code> \u5408\u8d77\u6765\u4fdd\u5b58\u4e2d\u95f4\u7ed3\u679c\u3002<\/p>\n\n\n\n
P | Y<\/code> \u5408\u8d77\u6765\u662f 64 \u4f4d\u5bc4\u5b58\u5668\uff0c\u6700\u7ec8\u7ed3\u679c\u4e5f\u5728\u8fd9\u91cc\u3002<\/p>\n\n\n\n
ALU<\/code> \u53ea\u8d1f\u8d23\u5bf9 P<\/code> \u548c X<\/code> \u505a\u52a0\u6cd5\u6216\u51cf\u6cd5\uff0c\u4e0d\u76f4\u63a5\u5bf9\u6574\u4e2a 64 \u4f4d\u4e58\u79ef\u505a\u52a0\u51cf\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u770b\u5230\u9009\u9879\u8bf4 P \u548c Y \u4e00\u8d77\u53f3\u79fb<\/code>\uff0c\u8fd9\u901a\u5e38\u662f\u5bf9\u7684\uff1b\u770b\u5230\u9009\u9879\u8bf4 X \u4e5f\u8ddf\u7740\u53f3\u79fb<\/code>\uff0c\u901a\u5e38\u5c31\u8981\u6000\u7591\u3002<\/p>\n\n\n\n
\n\n\n\n
\u7b2c\u4e09\u6b65\uff1a\u5224\u65ad\u6bcf\u8f6e\u64cd\u4f5c<\/h3>\n\n\n\n
\u8865\u7801 Booth \u4e58\u6cd5\u6bcf\u8f6e\u4e0d\u4e00\u5b9a\u52a0\u51cf\uff0c\u53ef\u80fd\u7a7a\u64cd\u4f5c\u3002<\/p>\n\n\n\n
\u8fd9\u4e2a\u70b9\u5f88\u5e38\u8003\u3002\u56e0\u4e3a\u5f88\u591a\u540c\u5b66\u4f1a\u4ee5\u4e3a\u201c\u65e2\u7136\u56fe\u91cc\u6709 ALU\uff0c\u90a3\u6bcf\u8f6e ALU \u5fc5\u987b\u505a\u52a0\u6cd5\u6216\u51cf\u6cd5\u201d\u3002\u5b9e\u9645\u4e0a\u4e0d\u662f\u3002<\/p>\n\n\n\n
Booth \u89c4\u5219\u4e2d\uff1a<\/p>\n\n\n\n
00\uff1a\u4e0d\u64cd\u4f5c\n01\uff1a\u52a0 X\n10\uff1a\u51cf X\n11\uff1a\u4e0d\u64cd\u4f5c\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u5982\u679c\u9009\u9879\u8bf4\u201c\u6267\u884c\u8fc7\u7a0b\u4e2d ALU \u8981\u4e48\u52a0\u6cd5\uff0c\u8981\u4e48\u51cf\u6cd5\uff0c\u4e0d\u53ef\u80fd\u7a7a\u64cd\u4f5c\u201d\uff0c\u8fd9\u662f\u9519\u7684\u3002<\/p>\n\n\n\n
\n\n\n\n
\u7b2c\u56db\u6b65\uff1a\u5224\u65ad\u53f3\u79fb\u7c7b\u578b<\/h3>\n\n\n\n
\u8fd9\u662f\u672c\u9898\u6700\u6838\u5fc3\u7684\u5224\u65ad\u70b9\u3002<\/p>\n\n\n\n
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\u7b97\u672f\u53f3\u79fb\u7684\u542b\u4e49\u662f\uff1a\u6700\u9ad8\u4f4d\u8865\u539f\u7b26\u53f7\u4f4d\u3002<\/p>\n\n\n\n
\u903b\u8f91\u53f3\u79fb\u7684\u542b\u4e49\u662f\uff1a\u6700\u9ad8\u4f4d\u8865 0\u3002<\/p>\n\n\n\n
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\u53ef\u4ee5\u8bb0\u6210\uff1a<\/p>\n\n\n\n
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\n\n\n\n
\u4e94\u3001\u672c\u8d28\u4e0a\u5230\u5e95\u8003\u4ec0\u4e48\uff1f<\/h2>\n\n\n\n
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A\uff1a\u8003\u65e0\u7b26\u53f7\u4e58\u6cd5\u548c\u8865\u7801\u4e58\u6cd5\u7535\u8def\u662f\u5426\u4e00\u6837\nB\uff1a\u8003 Booth \u4e58\u6cd5\u662f\u5426\u5141\u8bb8\u7a7a\u64cd\u4f5c\nC\uff1a\u8003\u8865\u7801\u4e58\u6cd5\u53f3\u79fb\u7c7b\u578b\nD\uff1a\u8003 32 \u4f4d\u4e58\u6cd5\u7ed3\u679c\u4e0e\u6ea2\u51fa\u5224\u65ad\n<\/code><\/pre>\n\n\n\n
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\n\n\n\n
\u516d\u3001\u51e0\u4e2a\u9ad8\u9891\u9677\u9631<\/h2>\n\n\n\n
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\n\n\n\n
\u7b2c\u4e8c\uff0c\u5bb9\u6613\u8ba4\u4e3a ALU \u6bcf\u8f6e\u5fc5\u987b\u5de5\u4f5c\u3002<\/p>\n\n\n\n
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\n\n\n\n
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\n\n\n\n
\u7b2c\u56db\uff0c\u5bb9\u6613\u7528\u201c\u9ad8\u4f4d\u4e0d\u4e3a 0\u201d\u5224\u65ad\u6709\u7b26\u53f7\u4e58\u6cd5\u6ea2\u51fa\u3002<\/p>\n\n\n\n
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\u4e03\u3001\u505a\u9898\u65f6\u7684\u5feb\u901f\u5224\u65ad\u53e3\u8bc0<\/h2>\n\n\n\n
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\"\"<\/div><\/figure>\n\n\n\n
\u672c\u9898\u7b54\u6848\uff1aA<\/strong>\u3002<\/p>\n\n\n\n
\u8fd9\u9053\u9898\u7684\u5173\u952e\u4e0d\u662f\u8ba9\u4f60\u771f\u7684\u624b\u7b97 32 \u6b21\u9664\u6cd5\u5faa\u73af\uff0c\u800c\u662f\u8003 32 \u4f4d\u8865\u7801\u6574\u6570\u9664\u6cd5\u4e2d\u7684\u7279\u6b8a\u6ea2\u51fa\u60c5\u51b5<\/strong>\u3002<\/p>\n\n\n\n
\u9898\u5e72\u8bf4\uff1a<\/p>\n\n\n\n
\u9664\u6570\u5bc4\u5b58\u5668 Y\n\u4f59\u6570\/\u5546\u5bc4\u5b58\u5668 Q\nY\u3001Q \u5747\u4e3a\u8865\u7801\u8868\u793a\n\u95ee\uff1a\u4ec0\u4e48\u521d\u59cb\u503c\u4e0b\u9664\u6cd5\u6267\u884c\u65f6\u95f4\u6700\u77ed\uff1f\n<\/code><\/pre>\n\n\n\n
\u5728\u8fd9\u79cd\u9664\u6cd5\u5668\u4e2d\uff0c\u6b63\u5e38\u7684 32 \u4f4d\u6574\u6570\u9664\u6cd5\u4e00\u822c\u8981\u7ecf\u8fc7\u591a\u6b21\u201c\u5de6\u79fb + \u52a0\/\u51cf + \u4e0a\u5546\u201d\u7684\u8fed\u4ee3\u8fc7\u7a0b\u3002\u56fe\u4e2d\u4e5f\u6709\u8ba1\u6570\u5668 C\u2099<\/code>\uff0c\u8bf4\u660e\u6b63\u5e38\u60c5\u51b5\u4e0b\u8981\u6309\u4f4d\u5faa\u73af\u6267\u884c\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u5982\u679c\u95ee\u201c\u6267\u884c\u65f6\u95f4\u6700\u77ed\u201d\uff0c\u901a\u5e38\u4e0d\u662f\u6bd4\u8f83\u54ea\u4e2a\u5546\u66f4\u7b80\u5355\uff0c\u800c\u662f\u8981\u770b\u6709\u6ca1\u6709 \u4e00\u5f00\u59cb\u5c31\u80fd\u5224\u5b9a\u5f02\u5e38<\/strong> \u7684\u60c5\u51b5\u3002\u5bf9\u4e8e 32 \u4f4d\u8865\u7801\u6574\u6570\u9664\u6cd5\uff0c\u6700\u5178\u578b\u7684\u5f02\u5e38\u5c31\u662f\uff1a<\/p>\n\n\n\n
-2\u00b3\u00b9 \u00f7 (-1) = +2\u00b3\u00b9\n<\/code><\/pre>\n\n\n\n
\u4f46\u662f 32 \u4f4d\u8865\u7801\u6574\u6570\u7684\u8868\u793a\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n
-2\u00b3\u00b9 ~ 2\u00b3\u00b9 - 1\n<\/code><\/pre>\n\n\n\n
\u4e5f\u5c31\u662f\u8bf4\uff0c+2\u00b3\u00b9<\/code> \u8d85\u51fa\u4e86 32 \u4f4d\u8865\u7801\u6b63\u6570\u7684\u6700\u5927\u8303\u56f4\uff0c\u56e0\u6b64\u53d1\u751f \u5546\u6ea2\u51fa<\/strong>\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0d\u9700\u8981\u5b8c\u6574\u6267\u884c 32 \u8f6e\u9664\u6cd5\uff0c\u53ef\u5728\u5f00\u59cb\u9636\u6bb5\u76f4\u63a5\u5224\u5b9a\u6ea2\u51fa\uff0c\u56e0\u6b64\u6267\u884c\u65f6\u95f4\u6700\u77ed\u3002<\/p>\n\n\n\n
\n\n\n\n
\u5148\u628a\u9009\u9879\u4e2d\u7684\u5341\u516d\u8fdb\u5236\u6570\u8f6c\u6362\u6210 32 \u4f4d\u8865\u7801\u771f\u503c\uff1a<\/p>\n\n\n\n
FFFF FFFF = -1\n8000 0000 = -2\u00b3\u00b9\n<\/code><\/pre>\n\n\n\n
\u9010\u9879\u5224\u65ad\u3002<\/p>\n\n\n\n
A \u9879\uff1a<\/p>\n\n\n\n
Y = FFFF FFFF = -1\nQ = 8000 0000 = -2\u00b3\u00b9\n<\/code><\/pre>\n\n\n\n
\u8868\u793a\uff1a<\/p>\n\n\n\n
Q \u00f7 Y = (-2\u00b3\u00b9) \u00f7 (-1) = +2\u00b3\u00b9\n<\/code><\/pre>\n\n\n\n
\u4f46 32 \u4f4d\u8865\u7801\u6700\u5927\u6b63\u6570\u662f 2\u00b3\u00b9 - 1<\/code>\uff0c\u6240\u4ee5 +2\u00b3\u00b9<\/code> \u4e0d\u80fd\u8868\u793a\uff0c\u53d1\u751f\u5546\u6ea2\u51fa\u3002\u53ef\u4ee5\u63d0\u524d\u7ec8\u6b62\uff0c\u6267\u884c\u65f6\u95f4\u6700\u77ed\u3002<\/p>\n\n\n\n
B \u9879\uff1a<\/p>\n\n\n\n
Y = 8000 0000 = -2\u00b3\u00b9\nQ = FFFF FFFF = -1\n<\/code><\/pre>\n\n\n\n
\u8868\u793a\uff1a<\/p>\n\n\n\n
(-1) \u00f7 (-2\u00b3\u00b9) = 0\uff0c\u4f59\u6570\u4e3a -1\n<\/code><\/pre>\n\n\n\n
\u5546\u4e3a 0\uff0c\u53ef\u4ee5\u8868\u793a\uff0c\u4e0d\u6ea2\u51fa\uff0c\u9700\u8981\u6b63\u5e38\u6267\u884c\u9664\u6cd5\u8fc7\u7a0b\u3002<\/p>\n\n\n\n
C \u9879\uff1a<\/p>\n\n\n\n
Y = FFFF FFFF = -1\nQ = FFFF FFFF = -1\n<\/code><\/pre>\n\n\n\n
\u8868\u793a\uff1a<\/p>\n\n\n\n
(-1) \u00f7 (-1) = 1\n<\/code><\/pre>\n\n\n\n
\u5546\u4e3a 1\uff0c\u53ef\u4ee5\u8868\u793a\uff0c\u4e0d\u6ea2\u51fa\u3002<\/p>\n\n\n\n
D \u9879\uff1a<\/p>\n\n\n\n
Y = 8000 0000 = -2\u00b3\u00b9\nQ = 8000 0000 = -2\u00b3\u00b9\n<\/code><\/pre>\n\n\n\n
\u8868\u793a\uff1a<\/p>\n\n\n\n
(-2\u00b3\u00b9) \u00f7 (-2\u00b3\u00b9) = 1\n<\/code><\/pre>\n\n\n\n
\u5546\u4e3a 1\uff0c\u4e5f\u53ef\u4ee5\u8868\u793a\uff0c\u4e0d\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u56e0\u6b64\u53ea\u6709 A \u4f1a\u4ea7\u751f\u8865\u7801\u6574\u6570\u9664\u6cd5\u4e2d\u7279\u6b8a\u7684\u5546\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u7ed3\u8bba\uff1a<\/p>\n\n\n\n
\u6b63\u786e\u7b54\u6848\uff1aA\n<\/code><\/pre>\n\n\n\n
\u8fd9\u7c7b\u9898\u7684\u56fa\u5b9a\u505a\u6cd5\u662f\uff1a\u5148\u628a FFFF FFFF<\/code> \u548c 8000 0000<\/code> \u8bc6\u522b\u51fa\u6765\u3002<\/p>\n\n\n\n
FFFF FFFF = -1\n8000 0000 = \u6700\u5c0f\u8d1f\u6570 = -2\u00b3\u00b9\n<\/code><\/pre>\n\n\n\n
\u7136\u540e\u91cd\u70b9\u68c0\u67e5\u662f\u5426\u51fa\u73b0\uff1a<\/p>\n\n\n\n
\u6700\u5c0f\u8d1f\u6570 \u00f7 (-1)\n<\/code><\/pre>\n\n\n\n
\u53ea\u8981\u662f 32 \u4f4d\u8865\u7801\u6574\u6570\u9664\u6cd5\uff1a<\/p>\n\n\n\n
0x80000000 \u00f7 0xFFFFFFFF\n= -2\u00b3\u00b9 \u00f7 (-1)\n= +2\u00b3\u00b9\n<\/code><\/pre>\n\n\n\n
\u8fd9\u4e2a\u7ed3\u679c\u8d85\u51fa 32 \u4f4d\u8865\u7801\u8303\u56f4\uff0c\u53d1\u751f\u5546\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u770b\u5230\u8fd9\u79cd\u9898\uff0c\u4e0d\u8981\u771f\u7684\u53bb\u6a21\u62df\u9664\u6cd5\u5668\u3002\u5b83\u672c\u8d28\u4e0a\u8003\u7684\u662f \u8865\u7801\u6574\u6570\u9664\u6cd5\u7684\u6ea2\u51fa\u8fb9\u754c<\/strong>\uff0c\u5c24\u5176\u662f \u6700\u5c0f\u8d1f\u6570 \u00f7 -1<\/code> \u8fd9\u4e00\u79cd\u7279\u6b8a\u60c5\u51b5\u3002<\/p>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
25\uff5e28 \u9898\u7684\u7b54\u6848\u5206\u522b\u662f\uff1a<\/p>\n\n\n\n
25\uff1aD
26\uff1aB
27\uff1aA
28\uff1aC<\/p>\n\n\n\n
\u8fd9\u51e0\u9898\u672c\u8d28\u4e0a\u90fd\u5728\u8003\u201c\u8865\u7801\u8868\u793a\u3001\u7b26\u53f7\u6269\u5c55\u3001\u5b9a\u70b9\u8865\u7801\u8fd0\u7b97\u6ea2\u51fa\u3001C \u8bed\u8a00\u6574\u578b\u63d0\u5347\u89c4\u5219\u201d\uff0c\u5c5e\u4e8e\u8ba1\u7b97\u673a\u7ec4\u6210\u539f\u7406\u4e2d\u201c\u6570\u636e\u7684\u8868\u793a\u548c\u8fd0\u7b97\u201d\u7684\u9ad8\u9891\u9898\u578b\u3002<\/p>\n\n\n\n
\u7b2c25\u9898\uff1aC \u8bed\u8a00\u4e2d int\u3001short \u6df7\u5408\u8fd0\u7b97<\/h2>\n\n\n\n
\u9898\u610f\u662f\uff1a32 \u4f4d\u673a\u5668\uff0cx<\/code> \u548c z<\/code> \u662f int<\/code> \u578b\uff0cy<\/code> \u662f short<\/code> \u578b\u3002<\/p>\n\n\n\n
\u5df2\u77e5\uff1a<\/p>\n\n\n\n
x = 127;\ny = -9;\nz = x + y;\n<\/code><\/pre>\n\n\n\n
\u8981\u6c42\u5224\u65ad\u6267\u884c\u540e x\u3001y\u3001z<\/code> \u7684\u673a\u5668\u6570\u8868\u793a\u3002<\/p>\n\n\n\n
x = 127<\/code>\uff0cint \u578b\u5360 32 \u4f4d\uff0c\u6240\u4ee5\uff1a<\/p>\n\n\n\n
x = 0000007FH\n<\/code><\/pre>\n\n\n\n
y = -9<\/code>\uff0cshort \u578b\u5360 16 \u4f4d\u3002\u5148\u5199\u51fa +9\uff1a<\/p>\n\n\n\n
+9 = 0009H\n<\/code><\/pre>\n\n\n\n
16 \u4f4d\u8865\u7801\u8868\u793a -9\uff0c\u5c31\u662f\u5bf9 0009H<\/code> \u6c42\u8865\u7801\uff1a<\/p>\n\n\n\n
0009H -> FFF7H\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
y = FFF7H\n<\/code><\/pre>\n\n\n\n
\u6ce8\u610f\u8fd9\u91cc\u6700\u5bb9\u6613\u9519\u7684\u662f\u628a -9<\/code> \u5199\u6210 FFF9H<\/code>\u3002
FFF9H<\/code> \u5176\u5b9e\u8868\u793a\u7684\u662f -7<\/code>\uff0c\u4e0d\u662f -9<\/code>\u3002<\/p>\n\n\n\n
\u6267\u884c\uff1a<\/p>\n\n\n\n
z = x + y;\n<\/code><\/pre>\n\n\n\n
\u5728 C \u8bed\u8a00\u4e2d\uff0cshort<\/code> \u53c2\u4e0e\u8868\u8fbe\u5f0f\u8fd0\u7b97\u65f6\u8981\u5148\u8fdb\u884c\u6574\u578b\u63d0\u5347\u3002\u4e5f\u5c31\u662f\u8bf4\uff0cy<\/code> \u4f1a\u4ece 16 \u4f4d short \u63d0\u5347\u4e3a 32 \u4f4d int\u3002<\/p>\n\n\n\n
\u56e0\u4e3a y<\/code> \u662f\u8d1f\u6570\uff0c\u6240\u4ee5\u8981\u8fdb\u884c\u7b26\u53f7\u6269\u5c55\uff1a<\/p>\n\n\n\n
y = FFF7H  ->  FFFFFFF7H\n<\/code><\/pre>\n\n\n\n
\u7136\u540e\u8ba1\u7b97\uff1a<\/p>\n\n\n\n
0000007FH + FFFFFFF7H = 00000076H\n<\/code><\/pre>\n\n\n\n
\u771f\u503c\u89d2\u5ea6\u770b\u5c31\u662f\uff1a<\/p>\n\n\n\n
127 + (-9) = 118\n<\/code><\/pre>\n\n\n\n
118 \u7684 32 \u4f4d\u8865\u7801\u5c31\u662f\uff1a<\/p>\n\n\n\n
00000076H\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u7b2c25\u9898\u9009\uff1a<\/p>\n\n\n\n
D\nx = 0000007FH\uff0cy = FFF7H\uff0cz = 00000076H\n<\/code><\/pre>\n\n\n\n
\u8fd9\u9898\u7684\u6838\u5fc3\u9677\u9631\u662f\u4e24\u4e2a\uff1a\u7b2c\u4e00\uff0c-9<\/code> \u7684 16 \u4f4d\u8865\u7801\u662f FFF7H<\/code>\uff1b\u7b2c\u4e8c\uff0cshort \u548c int \u6df7\u5408\u8fd0\u7b97\u65f6\uff0cshort \u8981\u5148\u7b26\u53f7\u6269\u5c55\u4e3a int\u3002<\/p>\n\n\n\n
\u7b2c26\u9898\uff1a8\u4f4d\u8865\u7801\u4e58\u6cd5\u662f\u5426\u6ea2\u51fa<\/h2>\n\n\n\n
\u9898\u610f\u662f\uff1a\u56db\u4e2a\u6574\u6570\u7528 8 \u4f4d\u8865\u7801\u8868\u793a\uff1a<\/p>\n\n\n\n
r1 = FEH\nr2 = F2H\nr3 = 90H\nr4 = F8H\n<\/code><\/pre>\n\n\n\n
\u8fd0\u7b97\u7ed3\u679c\u4ecd\u7136\u5b58\u5728\u4e00\u4e2a 8 \u4f4d\u5bc4\u5b58\u5668\u4e2d\uff0c\u5224\u65ad\u54ea\u4e00\u4e2a\u4e58\u6cd5\u4f1a\u6ea2\u51fa\u3002<\/p>\n\n\n\n
8 \u4f4d\u8865\u7801\u8868\u793a\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n
-128 ~ +127\n<\/code><\/pre>\n\n\n\n
\u5148\u628a\u6bcf\u4e2a\u673a\u5668\u6570\u8f6c\u6362\u6210\u771f\u503c\u3002<\/p>\n\n\n\n
FEH<\/code> \u662f 8 \u4f4d\u8865\u7801\uff1a<\/p>\n\n\n\n
FEH = 11111110\n<\/code><\/pre>\n\n\n\n
\u6700\u9ad8\u4f4d\u662f 1\uff0c\u8bf4\u660e\u662f\u8d1f\u6570\u3002\u5176\u771f\u503c\u4e3a\uff1a<\/p>\n\n\n\n
FEH = 254\n254 - 256 = -2\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
r1 = -2\n<\/code><\/pre>\n\n\n\n
\u540c\u7406\uff1a<\/p>\n\n\n\n
r2 = F2H = 242 - 256 = -14\nr3 = 90H = 144 - 256 = -112\nr4 = F8H = 248 - 256 = -8\n<\/code><\/pre>\n\n\n\n
\u9010\u9879\u8ba1\u7b97\uff1a<\/p>\n\n\n\n
A. r1 \u00d7 r2 = (-2) \u00d7 (-14) = 28\nB. r2 \u00d7 r3 = (-14) \u00d7 (-112) = 1568\nC. r1 \u00d7 r4 = (-2) \u00d7 (-8) = 16\nD. r2 \u00d7 r4 = (-14) \u00d7 (-8) = 112\n<\/code><\/pre>\n\n\n\n
8 \u4f4d\u8865\u7801\u80fd\u8868\u793a\u7684\u6700\u5927\u6b63\u6570\u662f 127\uff0c\u6240\u4ee5\u53ea\u6709\uff1a<\/p>\n\n\n\n
1568\n<\/code><\/pre>\n\n\n\n
\u8d85\u51fa\u4e86 8 \u4f4d\u8865\u7801\u8303\u56f4\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u7b2c26\u9898\u9009\uff1a<\/p>\n\n\n\n
B\n<\/code><\/pre>\n\n\n\n
\u8fd9\u9898\u4e0d\u8981\u76f4\u63a5\u5728\u5341\u516d\u8fdb\u5236\u4e0a\u786c\u7b97\uff0c\u6700\u5feb\u65b9\u6cd5\u662f\u5148\u8f6c\u771f\u503c\uff0c\u518d\u770b\u7ed3\u679c\u662f\u5426\u5728 -128 ~ +127<\/code> \u5185\u3002<\/p>\n\n\n\n
\u7b2c27\u9898\uff1a8\u4f4d\u8865\u7801\u4e0b\u8ba1\u7b97 z = 2x + y\/2<\/h2>\n\n\n\n
\u9898\u610f\u662f\uff1a\u67d0\u5b57\u957f\u4e3a 8 \u4f4d\u7684\u8ba1\u7b97\u673a\u4e2d\uff0c\u5df2\u77e5\uff1a<\/p>\n\n\n\n
[x]\u8865 = 11110100\n[y]\u8865 = 10110000\n<\/code><\/pre>\n\n\n\n
\u82e5\uff1a<\/p>\n\n\n\n
z = 2x + y\/2\n<\/code><\/pre>\n\n\n\n
\u6c42 z<\/code> \u7684\u673a\u5668\u6570\u3002<\/p>\n\n\n\n
\u5148\u628a x\u3001y \u4ece\u8865\u7801\u8f6c\u4e3a\u771f\u503c\u3002<\/p>\n\n\n\n
x = 11110100<\/code>\uff0c\u6700\u9ad8\u4f4d\u662f 1\uff0c\u6240\u4ee5\u662f\u8d1f\u6570\u3002\u5b83\u5bf9\u5e94\u7684\u65e0\u7b26\u53f7\u503c\u662f\uff1a<\/p>\n\n\n\n
11110100 = F4H = 244\n<\/code><\/pre>\n\n\n\n
8 \u4f4d\u8865\u7801\u771f\u503c\u4e3a\uff1a<\/p>\n\n\n\n
244 - 256 = -12\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
x = -12\n<\/code><\/pre>\n\n\n\n
y = 10110000<\/code>\uff0c\u65e0\u7b26\u53f7\u503c\u662f\uff1a<\/p>\n\n\n\n
10110000 = B0H = 176\n<\/code><\/pre>\n\n\n\n
\u771f\u503c\u4e3a\uff1a<\/p>\n\n\n\n
176 - 256 = -80\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
y = -80\n<\/code><\/pre>\n\n\n\n
\u4ee3\u5165\u8868\u8fbe\u5f0f\uff1a<\/p>\n\n\n\n
z = 2x + y\/2\nz = 2 \u00d7 (-12) + (-80)\/2\nz = -24 - 40\nz = -64\n<\/code><\/pre>\n\n\n\n
8 \u4f4d\u8865\u7801\u4e2d\uff0c-64<\/code> \u7684\u8868\u793a\u662f\uff1a<\/p>\n\n\n\n
\u5148\u5199\u51fa +64<\/code>\uff1a<\/p>\n\n\n\n
01000000\n<\/code><\/pre>\n\n\n\n
\u53d6\u53cd\u52a0\u4e00\uff1a<\/p>\n\n\n\n
10111111 + 1 = 11000000\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
[z]\u8865 = 11000000\n<\/code><\/pre>\n\n\n\n
\u9009\u9879\u4e2d\u5199\u6210\u5206\u7ec4\u5f62\u5f0f\u5c31\u662f\uff1a<\/p>\n\n\n\n
1 1000000\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u7b2c27\u9898\u9009\uff1a<\/p>\n\n\n\n
A\n<\/code><\/pre>\n\n\n\n
\u8fd9\u9898\u8981\u6ce8\u610f\uff0cy\/2<\/code> \u5bf9\u8d1f\u6570\u6765\u8bf4\uff0c\u5728\u8ba1\u7b97\u673a\u7ec4\u6210\u539f\u7406\u4e2d\u5e38\u6309\u8865\u7801\u7b97\u672f\u53f3\u79fb\u7406\u89e3\u3002\u8fd9\u91cc -80 \/ 2 = -40<\/code>\uff0c\u80fd\u6574\u9664\uff0c\u4e0d\u6d89\u53ca\u5411\u4e0a\u8fd8\u662f\u5411\u4e0b\u53d6\u6574\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n
\u7b2c28\u9898\uff1a8\u4f4d\u5b9a\u70b9\u8865\u7801\u8fd0\u7b97\u5224\u65ad\u6ea2\u51fa<\/h2>\n\n\n\n
\u9898\u610f\u662f\uff1a<\/p>\n\n\n\n
x = 103\ny = -25\n<\/code><\/pre>\n\n\n\n
\u5224\u65ad\u4e0b\u5217\u8868\u8fbe\u5f0f\u91c7\u7528 8 \u4f4d\u5b9a\u70b9\u8865\u7801\u8fd0\u7b97\u65f6\uff0c\u54ea\u4e2a\u4f1a\u6ea2\u51fa\u3002<\/p>\n\n\n\n
8 \u4f4d\u8865\u7801\u8303\u56f4\u4ecd\u7136\u662f\uff1a<\/p>\n\n\n\n
-128 ~ +127\n<\/code><\/pre>\n\n\n\n
\u9010\u9879\u770b\u771f\u503c\u7ed3\u679c\u5373\u53ef\u3002<\/p>\n\n\n\n
A\uff1a<\/p>\n\n\n\n
x + y = 103 + (-25) = 78\n<\/code><\/pre>\n\n\n\n
78 \u5728\u8303\u56f4\u5185\uff0c\u4e0d\u6ea2\u51fa\u3002<\/p>\n\n\n\n
B\uff1a<\/p>\n\n\n\n
-x + y = -103 + (-25) = -128\n<\/code><\/pre>\n\n\n\n
-128<\/code> \u662f 8 \u4f4d\u8865\u7801\u53ef\u4ee5\u8868\u793a\u7684\u6700\u5c0f\u503c\uff0c\u6240\u4ee5\u4e0d\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u6ce8\u610f\uff1a\u5f88\u591a\u4eba\u4f1a\u8bef\u4ee5\u4e3a -128<\/code> \u6ea2\u51fa\uff0c\u4f46 8 \u4f4d\u8865\u7801\u8303\u56f4\u662f -128 ~ +127<\/code>\uff0c\u6240\u4ee5 -128<\/code> \u53ef\u4ee5\u8868\u793a\u3002<\/p>\n\n\n\n
C\uff1a<\/p>\n\n\n\n
x - y = 103 - (-25) = 128\n<\/code><\/pre>\n\n\n\n
128 \u8d85\u8fc7\u4e86 8 \u4f4d\u8865\u7801\u6700\u5927\u6b63\u6570 127\uff0c\u6240\u4ee5\u6ea2\u51fa\u3002<\/p>\n\n\n\n
D\uff1a<\/p>\n\n\n\n
-x - y = -103 - (-25) = -78\n<\/code><\/pre>\n\n\n\n
-78 \u5728\u8303\u56f4\u5185\uff0c\u4e0d\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u7b2c28\u9898\u9009\uff1a<\/p>\n\n\n\n
C\n<\/code><\/pre>\n\n\n\n
\u8fd9\u9898\u7528\u771f\u503c\u5224\u65ad\u6700\u5feb\u3002\u53ea\u8981\u7ed3\u679c\u8d85\u51fa -128 ~ +127<\/code>\uff0c\u5c31\u4e00\u5b9a\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u8fd9\u7c7b\u9898\u7684\u7edf\u4e00\u505a\u6cd5<\/h2>\n\n\n\n
\u8fd9\u51e0\u9898\u53ef\u4ee5\u5957\u4e00\u4e2a\u56fa\u5b9a\u6d41\u7a0b\u3002<\/p>\n\n\n\n
\u7b2c\u4e00\u6b65\uff0c\u770b\u5b57\u957f\u3002
\u5982\u679c\u662f 8 \u4f4d\u8865\u7801\uff0c\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n
-128 ~ +127\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u662f n \u4f4d\u8865\u7801\uff0c\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n
-2\u207f\u207b\u00b9 ~ 2\u207f\u207b\u00b9 - 1\n<\/code><\/pre>\n\n\n\n
\u7b2c\u4e8c\u6b65\uff0c\u628a\u673a\u5668\u6570\u8f6c\u771f\u503c\u3002
\u5bf9\u4e8e 8 \u4f4d\u8865\u7801\uff1a<\/p>\n\n\n\n
\u6700\u9ad8\u4f4d\u4e3a 0\uff1a\u76f4\u63a5\u770b\u6210\u6b63\u6570\n\u6700\u9ad8\u4f4d\u4e3a 1\uff1a\u771f\u503c = \u65e0\u7b26\u53f7\u503c - 256\n<\/code><\/pre>\n\n\n\n
\u4f8b\u5982\uff1a<\/p>\n\n\n\n
F2H = 242\n242 - 256 = -14\n<\/code><\/pre>\n\n\n\n
\u7b2c\u4e09\u6b65\uff0c\u5148\u7528\u771f\u503c\u7b97\u51fa\u7ed3\u679c\u3002
\u5c24\u5176\u662f\u5224\u65ad\u6ea2\u51fa\u65f6\uff0c\u4e0d\u8981\u6025\u7740\u4e8c\u8fdb\u5236\u786c\u52a0\uff0c\u771f\u503c\u6cd5\u6700\u5feb\u3002<\/p>\n\n\n\n
\u7b2c\u56db\u6b65\uff0c\u770b\u7ed3\u679c\u662f\u5426\u8d85\u51fa\u8868\u793a\u8303\u56f4\u3002
8 \u4f4d\u8865\u7801\u53ea\u8981\u7ed3\u679c\u4e0d\u5728\uff1a<\/p>\n\n\n\n
-128 ~ +127\n<\/code><\/pre>\n\n\n\n
\u5185\uff0c\u5c31\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u7b2c\u4e94\u6b65\uff0c\u5982\u679c\u9898\u76ee\u95ee\u673a\u5668\u6570\uff0c\u518d\u628a\u771f\u503c\u8f6c\u56de\u8865\u7801\u3002
\u8d1f\u6570\u8f6c\u8865\u7801\u53ef\u4ee5\u7528\u4e24\u79cd\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
\u65b9\u6cd5\u4e00\uff1a\u6b63\u6570\u539f\u7801\u53d6\u53cd\u52a0\u4e00\n\u65b9\u6cd5\u4e8c\uff1a\u771f\u503c + 2\u207f\n<\/code><\/pre>\n\n\n\n
\u6bd4\u5982 8 \u4f4d\u8865\u7801\u8868\u793a -64<\/code>\uff1a<\/p>\n\n\n\n
-64 + 256 = 192\n192 = C0H = 11000000\n<\/code><\/pre>\n\n\n\n
\u8fd9\u7c7b\u9898\u771f\u6b63\u8003\u7684\u4e0d\u662f\u590d\u6742\u8ba1\u7b97\uff0c\u800c\u662f\u51e0\u4e2a\u57fa\u672c\u70b9\u662f\u5426\u7a33\uff1a\u8865\u7801\u8303\u56f4\u3001\u8d1f\u6570\u8865\u7801\u8f6c\u771f\u503c\u3001\u771f\u503c\u8f6c\u8865\u7801\u3001\u7b26\u53f7\u6269\u5c55\u3001\u4ee5\u53ca C \u8bed\u8a00\u6574\u578b\u63d0\u5347\u89c4\u5219\u3002<\/p>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\u7b54\u6848\u6c47\u603b\uff1a<\/p>\n\n\n\n
30\uff1aB
31\uff1aA
32\uff1aB
33\uff1aC
34\uff1aD
35\uff1aD<\/p>\n\n\n\n
\u7b2c30\u9898\uff1a\u903b\u8f91\u53f3\u79fb\u4e0e\u7b97\u672f\u53f3\u79fb<\/h2>\n\n\n\n
\u539f\u673a\u5668\u6570\u4e3a\uff1a<\/p>\n\n\n\n
1101 1000\n<\/code><\/pre>\n\n\n\n
\u9898\u76ee\u95ee\u5206\u522b\u8fdb\u884c\u201c\u903b\u8f91\u53f3\u79fb 1 \u4f4d\u201d\u548c\u201c\u7b97\u672f\u53f3\u79fb 1 \u4f4d\u201d\u3002<\/p>\n\n\n\n
\u903b\u8f91\u53f3\u79fb\u7684\u89c4\u5219\u662f\uff1a\u6700\u9ad8\u4f4d\u8865 0\uff0c\u4f4e\u4f4d\u79fb\u51fa\u3002<\/p>\n\n\n\n
1101 1000 \u903b\u8f91\u53f3\u79fb 1 \u4f4d\n= 0110 1100\n<\/code><\/pre>\n\n\n\n
\u7b97\u672f\u53f3\u79fb\u7684\u89c4\u5219\u662f\uff1a\u6700\u9ad8\u4f4d\u8865\u539f\u7b26\u53f7\u4f4d\u3002\u539f\u6570\u6700\u9ad8\u4f4d\u662f 1\uff0c\u6240\u4ee5\u53f3\u79fb\u540e\u6700\u9ad8\u4f4d\u4ecd\u8865 1\u3002<\/p>\n\n\n\n
1101 1000 \u7b97\u672f\u53f3\u79fb 1 \u4f4d\n= 1110 1100\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u7ed3\u679c\u4f9d\u6b21\u662f\uff1a<\/p>\n\n\n\n
0110 1100\uff0c1110 1100\n<\/code><\/pre>\n\n\n\n
\u9009 B\u3002<\/p>\n\n\n\n
\u8fd9\u7c7b\u9898\u7684\u5173\u952e\u662f\uff1a\u903b\u8f91\u53f3\u79fb\u4e0d\u7ba1\u7b26\u53f7\uff0c\u7edf\u4e00\u8865 0\uff1b\u7b97\u672f\u53f3\u79fb\u4fdd\u7559\u7b26\u53f7\uff0c\u6b63\u6570\u8865 0\uff0c\u8d1f\u6570\u8865 1\u3002<\/p>\n\n\n\n
\u7b2c31\u9898\uff1a\u51cf\u6cd5\u4e2d\u7684 CF \u548c OF<\/h2>\n\n\n\n
\u9898\u76ee\u7ed9\u51fa\u51cf\u6cd5\u6307\u4ee4\uff1a<\/p>\n\n\n\n
(R1) - (R2) -> R3\n<\/code><\/pre>\n\n\n\n
\u5df2\u77e5\uff1a<\/p>\n\n\n\n
R1 = FFFF FFFFH\nR2 = FFFF FFF0H\n<\/code><\/pre>\n\n\n\n
\u5148\u6309\u65e0\u7b26\u53f7\u6570\u770b\uff1a<\/p>\n\n\n\n
FFFF FFFFH = 2\u00b3\u00b2 - 1\nFFFF FFF0H = 2\u00b3\u00b2 - 16\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
FFFF FFFFH - FFFF FFF0H = 0000 000FH\n<\/code><\/pre>\n\n\n\n
\u5373\u7ed3\u679c\u4e3a 15\u3002<\/p>\n\n\n\n
\u5bf9\u4e8e\u51cf\u6cd5\u6765\u8bf4\uff0cCF \u8868\u793a\u501f\u4f4d\u6807\u5fd7\u3002\u5224\u65ad\u65b9\u6cd5\u5f88\u7b80\u5355\uff1a<\/p>\n\n\n\n
\u82e5\u65e0\u7b26\u53f7\u6570 x < y\uff0c\u5219 x - y \u9700\u8981\u501f\u4f4d\uff0cCF = 1\n\u82e5\u65e0\u7b26\u53f7\u6570 x >= y\uff0c\u5219\u4e0d\u9700\u8981\u501f\u4f4d\uff0cCF = 0\n<\/code><\/pre>\n\n\n\n
\u8fd9\u91cc\uff1a<\/p>\n\n\n\n
FFFF FFFFH > FFFF FFF0H\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u4e0d\u501f\u4f4d\uff0cCF = 0\u3002<\/p>\n\n\n\n
\u518d\u770b OF\u3002OF \u662f\u6709\u7b26\u53f7\u6ea2\u51fa\u6807\u5fd7\u3002<\/p>\n\n\n\n
FFFF FFFFH \u8868\u793a -1\nFFFF FFF0H \u8868\u793a -16\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
-1 - (-16) = 15\n<\/code><\/pre>\n\n\n\n
15 \u5728 32 \u4f4d\u8865\u7801\u8303\u56f4\u5185\uff0c\u4e0d\u6ea2\u51fa\uff0c\u56e0\u6b64 OF = 0\u3002<\/p>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
CF = 0\uff0cOF = 0\n<\/code><\/pre>\n\n\n\n
\u9009 A\u3002<\/p>\n\n\n\n
\u8fd9\u7c7b\u9898\u5fc5\u987b\u5206\u6e05\uff1aCF \u7ba1\u65e0\u7b26\u53f7\u501f\u4f4d\uff0cOF \u7ba1\u6709\u7b26\u53f7\u6ea2\u51fa\u3002\u4e0d\u8981\u628a\u7ed3\u679c\u6700\u9ad8\u4f4d\u3001\u6b63\u8d1f\u53f7\u548c CF \u6df7\u5728\u4e00\u8d77\u5224\u65ad\u3002<\/p>\n\n\n\n
\u7b2c32\u9898\uff1a\u7ee7\u7eed\u8003\u51cf\u6cd5\u7684 OF \u548c CF<\/h2>\n\n\n\n
\u9898\u76ee\u5df2\u7ecf\u544a\u8bc9\uff1a<\/p>\n\n\n\n
x = 100\uff0cy = 200\n\u6267\u884c x - y\nOF = 0\uff0cCF = 1\n<\/code><\/pre>\n\n\n\n
\u8fd9\u5176\u5b9e\u662f\u5728\u63d0\u793a CF \u7684\u5224\u5b9a\u89c4\u5219\uff1a\u51cf\u6cd5\u4e2d\u5982\u679c\u65e0\u7b26\u53f7\u610f\u4e49\u4e0b x < y\uff0c\u5219\u9700\u8981\u501f\u4f4d\uff0cCF = 1\u3002<\/p>\n\n\n\n
\u73b0\u5728\u95ee\uff1a<\/p>\n\n\n\n
x = 10\uff0cy = -20\n\u6267\u884c x - y\n<\/code><\/pre>\n\n\n\n
\u5148\u770b\u6709\u7b26\u53f7\u7ed3\u679c\uff1a<\/p>\n\n\n\n
10 - (-20) = 30\n<\/code><\/pre>\n\n\n\n
30 \u5728 int \u7684\u8868\u793a\u8303\u56f4\u5185\uff0c\u6240\u4ee5\u6ca1\u6709\u6709\u7b26\u53f7\u6ea2\u51fa\uff1a<\/p>\n\n\n\n
OF = 0\n<\/code><\/pre>\n\n\n\n
\u518d\u770b CF\u3002CF \u8981\u4ece\u65e0\u7b26\u53f7\u89d2\u5ea6\u770b\u3002<\/p>\n\n\n\n
\u5728 32 \u4f4d\u8865\u7801\u673a\u5668\u4e2d\uff0c-20 \u7684\u673a\u5668\u6570\u4e0d\u662f\u201c\u8d1f\u6570\u201d\uff0c\u800c\u662f\u4e00\u4e2a\u5f88\u5927\u7684\u65e0\u7b26\u53f7\u6570\uff1a<\/p>\n\n\n\n
-20 \u7684\u8865\u7801\u65e0\u7b26\u53f7\u89e3\u91ca = 2\u00b3\u00b2 - 20\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u4ece\u65e0\u7b26\u53f7\u51cf\u6cd5\u89d2\u5ea6\u770b\uff1a<\/p>\n\n\n\n
10 - (2\u00b3\u00b2 - 20)\n<\/code><\/pre>\n\n\n\n
\u663e\u7136 10 \u5c0f\u4e8e 2\u00b3\u00b2 – 20\uff0c\u9700\u8981\u501f\u4f4d\uff0c\u56e0\u6b64\uff1a<\/p>\n\n\n\n
CF = 1\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
OF = 0\uff0cCF = 1\n<\/code><\/pre>\n\n\n\n
\u9009 B\u3002<\/p>\n\n\n\n
\u8fd9\u9898\u6700\u5bb9\u6613\u9519\u5728\u628a y = -20<\/code> \u76f4\u63a5\u5f53\u6210\u666e\u901a\u6570\u5b66\u8d1f\u6570\u53bb\u5224\u65ad CF\u3002CF \u4e0d\u7ba1\u6709\u7b26\u53f7\u8bed\u4e49\uff0c\u5b83\u53ea\u770b\u673a\u5668\u6570\u7684\u65e0\u7b26\u53f7\u51cf\u6cd5\u662f\u5426\u501f\u4f4d\u3002<\/p>\n\n\n\n
\u7b2c33\u9898\uff1aint \u8f6c short\uff0c\u518d\u8f6c int<\/h2>\n\n\n\n
\u4ee3\u7801\u4e3a\uff1a<\/p>\n\n\n\n
int i = -32777;\nshort si = i;\nint j = si;\n<\/code><\/pre>\n\n\n\n
\u7edf\u8003\u9ed8\u8ba4\u73af\u5883\u4e00\u822c\u6309\uff1a<\/p>\n\n\n\n
int\uff1a32 \u4f4d\nshort\uff1a16 \u4f4d\n\u8865\u7801\u8868\u793a\n<\/code><\/pre>\n\n\n\n
16 \u4f4d short \u7684\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n
-32768 ~ 32767\n<\/code><\/pre>\n\n\n\n
\u800c -32777<\/code> \u5df2\u7ecf\u8d85\u51fa\u4e86 short \u7684\u8303\u56f4\u3002<\/p>\n\n\n\n
\u5148\u6c42 -32777<\/code> \u7684\u4f4e 16 \u4f4d\u3002<\/p>\n\n\n\n
\u56e0\u4e3a\uff1a<\/p>\n\n\n\n
32777 = 32768 + 9 = 8009H\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5 32 \u4f4d\u8865\u7801\u4e2d\uff1a<\/p>\n\n\n\n
-32777 = FFFF 7FF7H\n<\/code><\/pre>\n\n\n\n
\u8d4b\u503c\u7ed9 short \u65f6\uff0c\u53ea\u4fdd\u7559\u4f4e 16 \u4f4d\uff1a<\/p>\n\n\n\n
7FF7H\n<\/code><\/pre>\n\n\n\n
7FF7H<\/code> \u7684\u6700\u9ad8\u4f4d\u662f 0\uff0c\u6240\u4ee5\u4f5c\u4e3a short \u89e3\u91ca\u65f6\u662f\u6b63\u6570\uff1a<\/p>\n\n\n\n
7FF7H = 32759\n<\/code><\/pre>\n\n\n\n
\u518d\u8d4b\u503c\u7ed9 int\uff1a<\/p>\n\n\n\n
j = 32759\n<\/code><\/pre>\n\n\n\n
\u9009 C\u3002<\/p>\n\n\n\n
\u8fd9\u7c7b\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u9898\u8981\u6293\u4f4f\u4e24\u6b65\uff1a\u957f\u6574\u6570\u8f6c\u77ed\u6574\u6570\uff0c\u622a\u65ad\u4f4e\u4f4d\uff1b\u77ed\u6574\u6570\u8f6c\u957f\u6574\u6570\uff0c\u770b\u539f\u7c7b\u578b\u662f\u5426\u6709\u7b26\u53f7\uff0c\u6709\u7b26\u53f7\u6570\u8981\u7b26\u53f7\u6269\u5c55\u3002\u8fd9\u91cc\u622a\u65ad\u540e\u6700\u9ad8\u4f4d\u4e3a 0\uff0c\u6240\u4ee5\u6269\u5c55\u540e\u4ecd\u662f\u6b63\u6570\u3002<\/p>\n\n\n\n
\u7b2c34\u9898\uff1a\u6574\u6570\u4e58\u6cd5\u8fd0\u7b97\u53d9\u8ff0\u5224\u65ad<\/h2>\n\n\n\n
\u9898\u76ee\u95ee\u9519\u8bef\u7684\u662f\u54ea\u4e00\u9879\u3002<\/p>\n\n\n\n
A\uff1a\u7528\u9635\u5217\u4e58\u6cd5\u5668\u5b9e\u73b0\u7684\u4e58\u8fd0\u7b97\u53ef\u4ee5\u5728\u4e00\u4e2a\u65f6\u949f\u5468\u671f\u5185\u5b8c\u6210\u3002
\u8fd9\u5728\u7ec4\u6210\u539f\u7406\u8003\u6cd5\u4e2d\u4e00\u822c\u8ba4\u4e3a\u6b63\u786e\u3002\u9635\u5217\u4e58\u6cd5\u5668\u5c5e\u4e8e\u786c\u4ef6\u5e76\u884c\u4e58\u6cd5\u5668\uff0c\u53ef\u4ee5\u901a\u8fc7\u7ec4\u5408\u903b\u8f91\u5e76\u884c\u4ea7\u751f\u90e8\u5206\u79ef\u5e76\u6c42\u548c\uff0c\u901f\u5ea6\u5feb\uff0c\u53ef\u4ee5\u8bbe\u8ba1\u6210\u4e00\u4e2a\u65f6\u949f\u5468\u671f\u5b8c\u6210\u3002<\/p>\n\n\n\n
B\uff1a\u7528 ALU \u548c\u79fb\u4f4d\u5668\u5b9e\u73b0\u7684\u4e58\u8fd0\u7b97\u65e0\u6cd5\u5728\u4e00\u4e2a\u65f6\u949f\u5468\u671f\u5185\u5b8c\u6210\u3002
\u8fd9\u901a\u5e38\u6b63\u786e\u3002\u7528 ALU \u548c\u79fb\u4f4d\u5668\u5b9e\u73b0\u4e58\u6cd5\uff0c\u5f80\u5f80\u5bf9\u5e94\u79fb\u4f4d\u52a0\u6cd5\u7684\u8fed\u4ee3\u8fc7\u7a0b\uff0c\u6bcf\u6b21\u5904\u7406\u4e00\u4f4d\u6216\u82e5\u5e72\u4f4d\uff0c\u901a\u5e38\u9700\u8981\u591a\u4e2a\u65f6\u949f\u5468\u671f\u3002<\/p>\n\n\n\n
C\uff1a\u53d8\u91cf\u4e0e\u5e38\u6570\u7684\u4e58\u8fd0\u7b97\u53ef\u7f16\u8bd1\u4f18\u5316\u4e3a\u82e5\u5e72\u79fb\u4f4d\u53ca\u52a0\u51cf\u8fd0\u7b97\u6307\u4ee4\u3002
\u6b63\u786e\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n
x \u00d7 8 \u53ef\u4ee5\u4f18\u5316\u4e3a x << 3\nx \u00d7 9 \u53ef\u4ee5\u4f18\u5316\u4e3a (x << 3) + x\nx \u00d7 15 \u53ef\u4ee5\u4f18\u5316\u4e3a (x << 4) - x\n<\/code><\/pre>\n\n\n\n
\u8fd9\u53eb\u5f3a\u5ea6\u524a\u5f31\uff0c\u662f\u5e38\u89c1\u7f16\u8bd1\u4f18\u5316\u3002<\/p>\n\n\n\n
D\uff1a\u4e24\u4e2a\u53d8\u91cf\u7684\u4e58\u8fd0\u7b97\u65e0\u6cd5\u7f16\u8bd1\u8f6c\u6362\u4e3a\u79fb\u4f4d\u53ca\u52a0\u6cd5\u7b49\u6307\u4ee4\u7684\u5faa\u73af\u5b9e\u73b0\u3002
\u9519\u8bef\u3002\u4e24\u4e2a\u53d8\u91cf\u76f8\u4e58\u5f53\u7136\u53ef\u4ee5\u7528\u8f6f\u4ef6\u5faa\u73af\u5b9e\u73b0\uff0c\u6bd4\u5982\u6839\u636e\u4e58\u6570\u7684\u6bcf\u4e00\u4f4d\u51b3\u5b9a\u662f\u5426\u7d2f\u52a0\u88ab\u4e58\u6570\uff0c\u5e76\u4e0d\u65ad\u79fb\u4f4d\u3002\u8fd9\u6b63\u662f\u4e58\u6cd5\u5668\u7684\u57fa\u672c\u601d\u60f3\uff0c\u53ea\u4e0d\u8fc7\u53ef\u4ee5\u7531\u786c\u4ef6\u505a\uff0c\u4e5f\u53ef\u4ee5\u7531\u8f6f\u4ef6\u6307\u4ee4\u5e8f\u5217\u6a21\u62df\u3002<\/p>\n\n\n\n
\u56e0\u6b64\u9519\u8bef\u9879\u662f D\u3002<\/p>\n\n\n\n
\u8fd9\u9898\u8003\u7684\u4e0d\u662f\u590d\u6742\u4e58\u6cd5\u7b97\u6cd5\uff0c\u800c\u662f\u533a\u5206\u201c\u786c\u4ef6\u4e58\u6cd5\u5668\u201d\u201c\u8fed\u4ee3\u79fb\u4f4d\u52a0\u6cd5\u201d\u201c\u7f16\u8bd1\u4f18\u5316\u201d\u3002\u770b\u5230\u201c\u65e0\u6cd5\u201d\u8fd9\u79cd\u7edd\u5bf9\u8bf4\u6cd5\u8981\u7279\u522b\u8b66\u60d5\u3002<\/p>\n\n\n\n
\u7b2c35\u9898\uff1a8 \u4f4d\u8865\u7801\u51cf\u6cd5\u4e0e\u6ea2\u51fa<\/h2>\n\n\n\n
\u5df2\u77e5\uff1a<\/p>\n\n\n\n
[x]\u8865 = A3H\n[y]\u8865 = 75H\n<\/code><\/pre>\n\n\n\n
\u673a\u5668\u5b57\u957f\u4e3a 8 \u4f4d\uff0c\u90fd\u662f\u5e26\u7b26\u53f7\u6574\u6570\u3002<\/p>\n\n\n\n
\u5148\u8fd8\u539f\u771f\u503c\uff1a<\/p>\n\n\n\n
A3H = 1010 0011B\n<\/code><\/pre>\n\n\n\n
\u6700\u9ad8\u4f4d\u4e3a 1\uff0c\u662f\u8d1f\u6570\u3002\u5176\u771f\u503c\u4e3a\uff1a<\/p>\n\n\n\n
A3H = 163\n163 - 256 = -93\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
x = -93\n<\/code><\/pre>\n\n\n\n
\u518d\u770b y\uff1a<\/p>\n\n\n\n
75H = 0111 0101B\n<\/code><\/pre>\n\n\n\n
\u6700\u9ad8\u4f4d\u4e3a 0\uff0c\u662f\u6b63\u6570\uff1a<\/p>\n\n\n\n
y = 117\n<\/code><\/pre>\n\n\n\n
\u6570\u5b66\u4e0a\uff1a<\/p>\n\n\n\n
x - y = -93 - 117 = -210\n<\/code><\/pre>\n\n\n\n
\u4f46 8 \u4f4d\u8865\u7801\u80fd\u8868\u793a\u7684\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n
-128 ~ 127\n<\/code><\/pre>\n\n\n\n
-210 \u8d85\u51fa\u8303\u56f4\uff0c\u6240\u4ee5\u4e00\u5b9a\u6ea2\u51fa\uff1a<\/p>\n\n\n\n
OF = 1\n<\/code><\/pre>\n\n\n\n
\u518d\u770b\u673a\u5668\u5b9e\u9645\u5f97\u5230\u7684\u7ed3\u679c\uff1a<\/p>\n\n\n\n
A3H - 75H\n= A3H + (-75H)\n<\/code><\/pre>\n\n\n\n
75H \u7684\u76f8\u53cd\u6570\u8865\u7801\u4e3a\uff1a<\/p>\n\n\n\n
75H = 0111 0101\n\u6309\u4f4d\u53d6\u53cd\uff1a1000 1010\n\u52a0 1\uff1a1000 1011 = 8BH\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
A3H + 8BH = 12EH\n<\/code><\/pre>\n\n\n\n
8 \u4f4d\u673a\u5668\u53ea\u4fdd\u7559\u4f4e 8 \u4f4d\uff1a<\/p>\n\n\n\n
2EH\n<\/code><\/pre>\n\n\n\n
2EH<\/code> \u7684\u5341\u8fdb\u5236\u662f\uff1a<\/p>\n\n\n\n
2 \u00d7 16 + 14 = 46\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u673a\u5668\u5f97\u5230\u7684\u7ed3\u679c\u662f 46\uff0c\u4f46\u8fd9\u662f\u6ea2\u51fa\u540e\u7684\u9519\u8bef\u7ed3\u679c\u3002<\/p>\n\n\n\n
\u56e0\u6b64\uff1a<\/p>\n\n\n\n
x - y \u7684\u673a\u5668\u7ed3\u679c = 46\nOF = 1\n<\/code><\/pre>\n\n\n\n
\u9009 D\u3002<\/p>\n\n\n\n
\u8fd9\u9898\u7684\u5173\u952e\u662f\uff1a\u6570\u5b66\u771f\u503c\u662f -210\uff0c\u4f46\u673a\u5668\u7ed3\u679c\u6309 8 \u4f4d\u8865\u7801\u622a\u65ad\u540e\u53d8\u6210 46\u3002\u9898\u76ee\u9009\u9879\u95ee\u7684\u662f\u201c\u901a\u8fc7\u8865\u7801\u52a0\u51cf\u8fd0\u7b97\u5f97\u5230\u7684 x – y \u7684\u503c\u53ca OF \u6807\u5fd7\u201d\uff0c\u6240\u4ee5\u8981\u586b\u673a\u5668\u8fd0\u7b97\u7ed3\u679c\u548c\u6ea2\u51fa\u6807\u5fd7\uff0c\u5373 46\uff0c1\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u572835\u9898\u91cc\u9762\uff0c\u6211\u4eec\u77e5\u9053\u5982\u679c\u4e24\u4e2a\u6570\u5982\u679c\u5b83\u6ea2\u51fa\u7684\u8bdd\uff0c\u5b9e\u9645\u4e0a\u60f3\u8981\u6c42\u6700\u540e\u8f93\u51fa\u7684\u503c\u662f\u628a\u4e00\u4e2a\u6570\u8f6c\u6362\u6210\u8865\u7801\uff0c\u76f8\u5f53\u4e8e\u8865\u7801\u7684\u8865\u7801\uff0c\u5bf9\u5427\uff1f \u572833\u9898\u91cc\u9762\uff0c\u5728\u8d85\u51fa\u4e86\u8303\u56f4\u91cc\uff0c\u6c42\u7b2c16\u4f4d\u8be5\u5982\u4f55\u5feb\u901f\u6c42\u5462\uff1f\u6211\u6ca1\u6709\u770b\u61c2\u8fd9\u4e2a\u5f0f\u5b50<\/em><\/strong><\/p>\n\n\n\n
\u4e0d\u662f\u201c\u8865\u7801\u7684\u8865\u7801\u201d\u8fd9\u4e2a\u8bf4\u6cd5\u6700\u51c6\u786e\uff0c\u800c\u5e94\u7406\u89e3\u4e3a\uff1a<\/p>\n\n\n\n
\u673a\u5668\u505a\u8865\u7801\u52a0\u51cf\u6cd5\u65f6\uff0c\u4e0d\u7ba1\u662f\u5426\u6ea2\u51fa\uff0c\u786c\u4ef6\u90fd\u4f1a\u6309\u56fa\u5b9a\u5b57\u957f\u53ea\u4fdd\u7559\u4f4e n \u4f4d\u3002\u6ea2\u51fa\u53ea\u662f\u8bf4\u660e\u8fd9\u4e2a n \u4f4d\u7ed3\u679c\u4e0d\u80fd\u4ee3\u8868\u771f\u5b9e\u6570\u5b66\u7ed3\u679c\u3002<\/strong><\/p>\n\n\n\n
\u6240\u4ee5\u7b2c35\u9898\u7684\u672c\u8d28\u662f\uff1a<\/p>\n\n\n\n
8 \u4f4d\u8865\u7801\u8fd0\u7b97\uff1a\n[x - y]\u8865 = [x]\u8865 + [-y]\u8865\n<\/code><\/pre>\n\n\n\n
\u9898\u76ee\u7ed9\uff1a<\/p>\n\n\n\n
[x]\u8865 = A3H\n[y]\u8865 = 75H\n<\/code><\/pre>\n\n\n\n
\u8981\u505a x - y<\/code>\uff0c\u673a\u5668\u5b9e\u9645\u505a\u7684\u662f\uff1a<\/p>\n\n\n\n
[x]\u8865 + [-y]\u8865\n<\/code><\/pre>\n\n\n\n
\u800c [-y]\u8865<\/code> \u600e\u4e48\u6765\uff1f\u5c31\u662f\u5bf9 [y]\u8865<\/code> \u6c42\u76f8\u53cd\u6570\u7684\u8865\u7801\u3002<\/p>\n\n\n\n
\u5bf9\u4e8e\u8865\u7801\u6765\u8bf4\uff0c\u4e00\u4e2a\u6570\u7684\u76f8\u53cd\u6570\u8865\u7801\u53ef\u4ee5\u7528\uff1a<\/p>\n\n\n\n
\u6309\u4f4d\u53d6\u53cd + 1\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
[y]\u8865 = 75H = 0111 0101\n\n[-y]\u8865\uff1a\n0111 0101 \u53d6\u53cd = 1000 1010\n1000 1010 + 1 = 1000 1011 = 8BH\n<\/code><\/pre>\n\n\n\n
\u4e8e\u662f\uff1a<\/p>\n\n\n\n
A3H - 75H\n= A3H + 8BH\n= 1010 0011\n+ 1000 1011\n= 1 0010 1110\n<\/code><\/pre>\n\n\n\n
8 \u4f4d\u673a\u5668\u53ea\u4fdd\u7559\u4f4e 8 \u4f4d\uff1a<\/p>\n\n\n\n
0010 1110 = 2EH = 46\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u673a\u5668\u6700\u540e\u7b97\u51fa\u6765\u7684\u4f4e 8 \u4f4d\u7ed3\u679c\u662f 46\u3002<\/p>\n\n\n\n
\u4f46\u771f\u5b9e\u6570\u5b66\u7ed3\u679c\u662f\uff1a<\/p>\n\n\n\n
A3H \u8868\u793a -93\n75H \u8868\u793a 117\n\nx - y = -93 - 117 = -210\n<\/code><\/pre>\n\n\n\n
8 \u4f4d\u8865\u7801\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n
-128 ~ 127\n<\/code><\/pre>\n\n\n\n
-210<\/code> \u8d85\u8303\u56f4\uff0c\u6240\u4ee5\u53d1\u751f\u6ea2\u51fa\uff0cOF = 1\u3002<\/p>\n\n\n\n
\u56e0\u6b64\u7b2c35\u9898\u662f\uff1a<\/p>\n\n\n\n
\u673a\u5668\u7ed3\u679c = 46\nOF = 1\n<\/code><\/pre>\n\n\n\n
\u4e5f\u5c31\u662f D\u3002<\/p>\n\n\n\n
\u8fd9\u91cc\u8981\u7279\u522b\u533a\u5206\u4e24\u4e2a\u4e1c\u897f\uff1a<\/p>\n\n\n\n
\u771f\u5b9e\u6570\u5b66\u7ed3\u679c\uff1a-210\n\u673a\u5668\u4f4e 8 \u4f4d\u7ed3\u679c\uff1a46\n\u6ea2\u51fa\u6807\u5fd7 OF\uff1a1\n<\/code><\/pre>\n\n\n\n
\u8003\u7814\u9898\u5982\u679c\u95ee\u201c\u8865\u7801\u52a0\u51cf\u8fd0\u7b97\u5f97\u5230\u7684\u7ed3\u679c\u201d\uff0c\u4e00\u822c\u8981\u5199\u673a\u5668\u4fdd\u7559\u4e0b\u6765\u7684 n \u4f4d\u7ed3\u679c\uff1b\u5982\u679c\u95ee\u201c\u771f\u503c\u662f\u5426\u6ea2\u51fa\u201d\uff0c\u518d\u5224\u65ad\u6570\u5b66\u7ed3\u679c\u662f\u5426\u8d85\u8303\u56f4\u3002<\/p>\n\n\n\n
\n\n\n\n
\u7b2c33\u9898\u4e2d\uff0c\u4f60\u6ca1\u770b\u61c2\u7684\u5173\u952e\u5f0f\u5b50\u5176\u5b9e\u662f\u5728\u5feb\u901f\u6c42\u201c\u4f4e 16 \u4f4d\u201d\u3002<\/p>\n\n\n\n
\u4ee3\u7801\u662f\uff1a<\/p>\n\n\n\n
int i = -32777;\nshort si = i;\nint j = si;\n<\/code><\/pre>\n\n\n\n
\u9ed8\u8ba4\u6309 408 \u5e38\u89c1\u8003\u6cd5\uff1a<\/p>\n\n\n\n
int \u662f 32 \u4f4d\u8865\u7801\nshort \u662f 16 \u4f4d\u8865\u7801\nint \u8f6c short \u65f6\uff0c\u4fdd\u7559\u4f4e 16 \u4f4d\nshort \u8f6c int \u65f6\uff0c\u7b26\u53f7\u6269\u5c55\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u6838\u5fc3\u95ee\u9898\u662f\uff1a<\/p>\n\n\n\n
-32777 \u7684\u4f4e 16 \u4f4d\u662f\u591a\u5c11\uff1f\n<\/code><\/pre>\n\n\n\n
\u65b9\u6cd5\u4e00\uff1a\u7528\u201c\u6a21 2\u00b9\u2076\u201d\u6700\u5feb<\/h3>\n\n\n\n
16 \u4f4d\u673a\u5668\u53ea\u4fdd\u7559\u4f4e 16 \u4f4d\uff0c\u672c\u8d28\u7b49\u4ef7\u4e8e\u5bf9 2\u00b9\u2076 = 65536<\/code> \u53d6\u6a21\u3002<\/p>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
-32777 \u5728 16 \u4f4d\u4e2d\u7684\u7ed3\u679c\n= -32777 mod 65536\n= 65536 - 32777\n= 32759\n<\/code><\/pre>\n\n\n\n
\u56e0\u6b64 short si<\/code> \u4e2d\u4fdd\u5b58\u7684\u673a\u5668\u6570\u5bf9\u5e94\u7684\u65e0\u7b26\u53f7\u503c\u662f 32759\u3002<\/p>\n\n\n\n
\u518d\u770b 32759 \u662f\u5426\u8d85\u8fc7 32767\uff1a<\/p>\n\n\n\n
32759 < 32767\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u5b83\u4f5c\u4e3a 16 \u4f4d\u6709\u7b26\u53f7 short \u89e3\u91ca\u65f6\u8fd8\u662f\u6b63\u6570\uff1a<\/p>\n\n\n\n
si = 32759\n<\/code><\/pre>\n\n\n\n
\u518d\u8d4b\u7ed9 int\uff0c\u7b26\u53f7\u6269\u5c55\u540e\u4ecd\u662f\uff1a<\/p>\n\n\n\n
j = 32759\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u9009 C\u3002<\/p>\n\n\n\n
\u8fd9\u4e2a\u65b9\u6cd5\u6700\u9002\u5408\u8003\u573a\u4f7f\u7528\u3002<\/p>\n\n\n\n
\u65b9\u6cd5\u4e8c\uff1a\u7528\u201c\u8d8a\u754c\u7ed5\u56de\u201d\u7406\u89e3<\/h3>\n\n\n\n
16 \u4f4d short \u7684\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n
-32768 ~ 32767\n<\/code><\/pre>\n\n\n\n
\u800c\uff1a<\/p>\n\n\n\n
-32777 = -32768 - 9\n<\/code><\/pre>\n\n\n\n
\u5b83\u6bd4 short \u6700\u5c0f\u503c\u8fd8\u5c0f 9\u3002<\/p>\n\n\n\n
\u8865\u7801\u6ea2\u51fa\u540e\u4f1a\u4ece\u6b63\u6570\u6700\u5927\u7aef\u9644\u8fd1\u7ed5\u56de\u6765\u3002\u5177\u4f53\u662f\uff1a<\/p>\n\n\n\n
-32768 \u518d\u51cf 1\uff0c\u4f1a\u53d8\u6210 32767\n-32768 \u518d\u51cf 2\uff0c\u4f1a\u53d8\u6210 32766\n-32768 \u518d\u51cf 9\uff0c\u4f1a\u53d8\u6210 32759\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
-32777 \u622a\u65ad\u6210 short \u540e = 32759\n<\/code><\/pre>\n\n\n\n
\u8fd9\u4e2a\u65b9\u6cd5\u751a\u81f3\u6bd4\u7b97\u5341\u516d\u8fdb\u5236\u66f4\u5feb\u3002<\/p>\n\n\n\n
\u65b9\u6cd5\u4e09\uff1a\u7528\u5341\u516d\u8fdb\u5236\u4f4e 16 \u4f4d<\/h3>\n\n\n\n
\u5148\u770b\uff1a<\/p>\n\n\n\n
32768 = 8000H\n32777 = 32768 + 9 = 8009H\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
+32777 = 0000 8009H\n<\/code><\/pre>\n\n\n\n
\u8981\u6c42\uff1a<\/p>\n\n\n\n
-32777 \u7684\u8865\u7801\n<\/code><\/pre>\n\n\n\n
32 \u4f4d\u8865\u7801\u53ef\u4ee5\u7528\uff1a<\/p>\n\n\n\n
2\u00b3\u00b2 - 32777\n<\/code><\/pre>\n\n\n\n
\u4f46\u7531\u4e8e\u6700\u540e\u53ea\u8981\u4f4e 16 \u4f4d\uff0c\u6240\u4ee5\u53ea\u770b\uff1a<\/p>\n\n\n\n
2\u00b9\u2076 - 32777\n= 10000H - 8009H\n= 7FF7H\n<\/code><\/pre>\n\n\n\n
\u4e5f\u5c31\u662f\u8bf4\uff1a<\/p>\n\n\n\n
-32777 \u7684\u4f4e 16 \u4f4d = 7FF7H\n<\/code><\/pre>\n\n\n\n
\u800c\uff1a<\/p>\n\n\n\n
7FF7H = 32759\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u6700\u540e\uff1a<\/p>\n\n\n\n
j = 32759\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
\u8fd9\u7c7b\u9898\u7684\u7edf\u4e00\u505a\u6cd5\u53ef\u4ee5\u8bb0\u6210\u4e00\u53e5\u8bdd\uff1a<\/p>\n\n\n\n
\u5927\u7c7b\u578b\u8f6c\u5c0f\u7c7b\u578b\uff1a\u622a\u65ad\uff0c\u4fdd\u7559\u4f4e\u4f4d\u3002\n\u5c0f\u7c7b\u578b\u8f6c\u5927\u7c7b\u578b\uff1a\u6269\u5c55\uff0c\u6709\u7b26\u53f7\u6570\u7b26\u53f7\u6269\u5c55\uff0c\u65e0\u7b26\u53f7\u6570\u96f6\u6269\u5c55\u3002\n<\/code><\/pre>\n\n\n\n
\u7b2c33\u9898\u5c31\u662f\uff1a<\/p>\n\n\n\n
int -> short\uff1a\u4fdd\u7559\u4f4e 16 \u4f4d\nshort -> int\uff1a\u56e0\u4e3a short \u662f\u6709\u7b26\u53f7\u7c7b\u578b\uff0c\u6240\u4ee5\u7b26\u53f7\u6269\u5c55\n<\/code><\/pre>\n\n\n\n
\u7531\u4e8e\u4fdd\u7559\u4e0b\u6765\u7684\u4f4e 16 \u4f4d\u662f\uff1a<\/p>\n\n\n\n
7FF7H = 0111 1111 1111 0111\n<\/code><\/pre>\n\n\n\n
\u6700\u9ad8\u4f4d\u662f 0\uff0c\u6240\u4ee5\u7b26\u53f7\u6269\u5c55\u540e\u8fd8\u662f\u6b63\u6570\uff1a<\/p>\n\n\n\n
0000 0000 0000 0000 0111 1111 1111 0111\n<\/code><\/pre>\n\n\n\n
\u56e0\u6b64 j = 32759<\/code>\u3002<\/p>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
3)x\u548cy\u76f8\u51cf\u540e\u7684\u7ed3\u679c\u5b58\u653e\u5728\u5bc4\u5b58\u5668 D\u4e2d\uff0c\u5bc4\u5b58\u5668 D\u4e2d\u7684\u5185\u5bb9\u662f\u4ec0\u4e48\uff1f\u6b64\u65f6\u6ea2\u51fa\u6807\u5fd7OF\u3001\u7b26\u53f7\u6807\u5fd7 SF \u5404\u662f\u4ec0\u4e48?<\/p>\n\n\n\n
\u4e0b\u9762\u6309\u56fe\u4e2d\u7684\u4e24\u9053\u7efc\u5408\u9898\u6765\u505a\u3002\u6838\u5fc3\u662f\u4e24\u4ef6\u4e8b\uff1a\u7b2c\u4e00\u9898\u8003\u201c\u540c\u4e00\u4e32\u673a\u5668\u7801\u6309 unsigned \/ int \u89e3\u91ca\u4e0d\u540c\uff0c\u4ee5\u53ca\u903b\u8f91\u79fb\u4f4d\u3001\u7b97\u672f\u79fb\u4f4d\u7684\u7ed3\u679c\u201d\uff1b\u7b2c\u4e8c\u9898\u8003\u201c8 \u4f4d\u8865\u7801\u52a0\u51cf\u6cd5\u3001\u6ea2\u51fa OF\u3001\u7b26\u53f7 SF\u201d\u3002<\/p>\n\n\n\n
01 \u9898\uff1aR1 = 8000 0004H\uff0c\u5206\u522b\u6309 unsigned int \u548c int \u89e3\u91ca<\/h2>\n\n\n\n
\u5df2\u77e5 R1 \u662f 32 \u4f4d\u5bc4\u5b58\u5668\uff1a<\/p>\n\n\n\n
R1 = 8000 0004H\n<\/code><\/pre>\n\n\n\n
\u5199\u6210\u4e8c\u8fdb\u5236\u5927\u81f4\u662f\uff1a<\/p>\n\n\n\n
1000 0000 0000 0000 0000 0000 0000 0100\n<\/code><\/pre>\n\n\n\n
\u6700\u9ad8\u4f4d\u662f 1\uff0c\u6240\u4ee5\u5982\u679c\u6309 unsigned int<\/code> \u770b\uff0c\u5b83\u53ea\u662f\u4e00\u4e2a\u5f88\u5927\u7684\u6b63\u6570\uff1b\u5982\u679c\u6309 int<\/code> \u8865\u7801\u770b\uff0c\u5b83\u662f\u4e00\u4e2a\u8d1f\u6570\u3002<\/p>\n\n\n\n
1\uff09\u5f53 x \u662f unsigned int \u578b\u65f6<\/h3>\n\n\n\n
unsigned int<\/code> \u6ca1\u6709\u7b26\u53f7\u4f4d\uff0c32 \u4f4d\u5168\u90e8\u53c2\u4e0e\u6570\u503c\u8868\u793a\u3002<\/p>\n\n\n\n
x = 8000 0004H\n  = 2\u00b3\u00b9 + 4\n  = 2147483652\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
x \u7684\u771f\u503c = 2147483652\n<\/code><\/pre>\n\n\n\n
\u9898\u76ee\u8bf4 unsigned int \u578b\u7684\u4e58\u9664\u6cd5\u91c7\u7528\u903b\u8f91\u79fb\u4f4d\u3002<\/p>\n\n\n\n
\u4e58\u4ee5 2\uff0c\u76f8\u5f53\u4e8e\u903b\u8f91\u5de6\u79fb 1 \u4f4d\uff1a<\/p>\n\n\n\n
8000 0004H << 1 = 0000 0008H\n<\/code><\/pre>\n\n\n\n
\u56e0\u4e3a\u6700\u9ad8\u4f4d\u7684 1 \u88ab\u79fb\u51fa\u53bb\u4e86\uff0c\u53ea\u4fdd\u7559\u4f4e 32 \u4f4d\u3002<\/p>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
2x \u5b58\u653e\u5728 R1 \u4e2d\u7684\u673a\u5668\u7801 = 0000 0008H\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u4ece\u6570\u5b66\u771f\u503c\u770b\uff1a<\/p>\n\n\n\n
2 \u00d7 2147483652 = 4294967304\n<\/code><\/pre>\n\n\n\n
\u4f46 32 \u4f4d unsigned int \u7684\u8868\u793a\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n
0 ~ 2\u00b3\u00b2 - 1\n= 0 ~ 4294967295\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u7ed3\u679c\u8d85\u8fc7\u4e86 32 \u4f4d\u8303\u56f4\u3002\u8ba1\u7b97\u673a\u4e2d\u53ea\u4fdd\u7559\u4f4e 32 \u4f4d\uff0c\u76f8\u5f53\u4e8e\u5bf9 2\u00b3\u00b2<\/code> \u53d6\u6a21\uff1a<\/p>\n\n\n\n
4294967304 mod 2\u00b3\u00b2 = 8\n<\/code><\/pre>\n\n\n\n
\u56e0\u6b64\u6700\u7ec8\u5bc4\u5b58\u5668\u4e2d\u7ed3\u679c\u5bf9\u5e94\u7684 unsigned \u771f\u503c\u662f\uff1a<\/p>\n\n\n\n
2x \u7684\u771f\u503c = 8\n<\/code><\/pre>\n\n\n\n
\u518d\u770b\u9664\u4ee5 2\u3002unsigned int \u9664\u4ee5 2 \u7528\u903b\u8f91\u53f3\u79fb 1 \u4f4d\uff0c\u9ad8\u4f4d\u8865 0\uff1a<\/p>\n\n\n\n
8000 0004H >> 1 = 4000 0002H\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
x\/2 \u5b58\u653e\u5728 R1 \u4e2d\u7684\u673a\u5668\u7801 = 4000 0002H\n<\/code><\/pre>\n\n\n\n
\u5176 unsigned \u771f\u503c\u4e3a\uff1a<\/p>\n\n\n\n
4000 0002H = 2\u00b3\u2070 + 2 = 1073741826\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
x\/2 \u7684\u771f\u503c = 1073741826\n<\/code><\/pre>\n\n\n\n
\u6574\u7406\u5982\u4e0b\uff1a<\/p>\n\n\n\n
x \u7684\u7c7b\u578b<\/th>x \u7684\u771f\u503c<\/th>2x \u673a\u5668\u7801<\/th>2x \u771f\u503c<\/th>x\/2 \u673a\u5668\u7801<\/th>x\/2 \u771f\u503c<\/th><\/tr><\/thead>
unsigned int<\/td>2147483652<\/td>0000 0008H<\/td>8<\/td>4000 0002H<\/td>1073741826<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\u8fd9\u91cc\u6700\u5bb9\u6613\u9519\u7684\u662f\u628a 8000 0004H<\/code> \u770b\u6210\u8d1f\u6570\u3002\u5b83\u53ea\u6709\u5728 int<\/code> \u8865\u7801\u89e3\u91ca\u4e0b\u624d\u662f\u8d1f\u6570\uff0c\u5728 unsigned int<\/code> \u89e3\u91ca\u4e0b\u662f\u6b63\u6570\u3002<\/p>\n\n\n\n
2\uff09\u5f53 x \u662f int \u578b\u65f6<\/h3>\n\n\n\n
int<\/code> \u9ed8\u8ba4\u6309 32 \u4f4d\u8865\u7801\u89e3\u91ca\u3002\u6700\u9ad8\u4f4d\u4e3a 1\uff0c\u8bf4\u660e\u5b83\u662f\u8d1f\u6570\u3002<\/p>\n\n\n\n
\u8865\u7801\u8f6c\u771f\u503c\u53ef\u4ee5\u7528\u516c\u5f0f\uff1a<\/p>\n\n\n\n
\u771f\u503c = \u65e0\u7b26\u53f7\u503c - 2\u00b3\u00b2\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
x = 8000 0004H\n  = 2147483652 - 4294967296\n  = -2147483644\n<\/code><\/pre>\n\n\n\n
\u56e0\u6b64\uff1a<\/p>\n\n\n\n
x \u7684\u771f\u503c = -2147483644\n<\/code><\/pre>\n\n\n\n
\u9898\u76ee\u8bf4 int \u578b\u7684\u4e58\u9664\u6cd5\u91c7\u7528\u7b97\u672f\u79fb\u4f4d\u3002<\/p>\n\n\n\n
\u5148\u770b\u9664\u4ee5 2\u3002\u8d1f\u6570\u7b97\u672f\u53f3\u79fb\u65f6\uff0c\u9ad8\u4f4d\u8865 1\uff1a<\/p>\n\n\n\n
8000 0004H \u7b97\u672f\u53f3\u79fb 1 \u4f4d = C000 0002H\n<\/code><\/pre>\n\n\n\n
\u89e3\u91ca\u4e3a 32 \u4f4d\u8865\u7801\uff1a<\/p>\n\n\n\n
C000 0002H = 3221225474 - 4294967296\n           = -1073741822\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
x\/2 \u5b58\u653e\u5728 R1 \u4e2d\u7684\u673a\u5668\u7801 = C000 0002H\nx\/2 \u7684\u771f\u503c = -1073741822\n<\/code><\/pre>\n\n\n\n
\u518d\u770b\u4e58\u4ee5 2\u3002\u7b97\u672f\u5de6\u79fb\u548c\u903b\u8f91\u5de6\u79fb\u5728\u5f62\u5f0f\u4e0a\u90fd\u662f\uff1a\u5de6\u79fb\uff0c\u4f4e\u4f4d\u8865 0\uff0c\u9ad8\u4f4d\u79fb\u51fa\u3002<\/p>\n\n\n\n
8000 0004H << 1 = 0000 0008H\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
2x \u5b58\u653e\u5728 R1 \u4e2d\u7684\u673a\u5668\u7801 = 0000 0008H\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u6309\u6570\u5b66\u8ba1\u7b97\uff1a<\/p>\n\n\n\n
2x = 2 \u00d7 (-2147483644)\n   = -4294967288\n<\/code><\/pre>\n\n\n\n
\u8fd9\u4e2a\u6570\u5df2\u7ecf\u8d85\u51fa 32 \u4f4d int \u7684\u8868\u793a\u8303\u56f4\uff1a<\/p>\n\n\n\n
-2\u00b3\u00b9 ~ 2\u00b3\u00b9 - 1\n= -2147483648 ~ 2147483647\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u53d1\u751f\u6ea2\u51fa\u3002\u5bc4\u5b58\u5668\u53ea\u4fdd\u5b58\u5de6\u79fb\u540e\u7684\u4f4e 32 \u4f4d\u7ed3\u679c\uff0c\u5373\uff1a<\/p>\n\n\n\n
0000 0008H\n<\/code><\/pre>\n\n\n\n
\u6309 int \u8865\u7801\u89e3\u91ca\u4e3a\uff1a<\/p>\n\n\n\n
2x \u7684\u5bc4\u5b58\u5668\u7ed3\u679c\u771f\u503c = 8\n<\/code><\/pre>\n\n\n\n
\u6574\u7406\u5982\u4e0b\uff1a<\/p>\n\n\n\n
x \u7684\u7c7b\u578b<\/th>x \u7684\u771f\u503c<\/th>2x \u673a\u5668\u7801<\/th>2x \u7ed3\u679c\u771f\u503c<\/th>x\/2 \u673a\u5668\u7801<\/th>x\/2 \u771f\u503c<\/th><\/tr><\/thead>
int<\/td>-2147483644<\/td>0000 0008H<\/td>8<\/td>C000 0002H<\/td>-1073741822<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\u8fd9\u4e00\u95ee\u7684\u9677\u9631\u662f\uff1aint<\/code> \u7684 2x<\/code> \u6570\u5b66\u771f\u503c\u5e94\u8be5\u662f -4294967288<\/code>\uff0c\u4f46 32 \u4f4d\u5bc4\u5b58\u5668\u88c5\u4e0d\u4e0b\uff0c\u5de6\u79fb\u540e\u5b9e\u9645\u4fdd\u5b58\u7684\u662f 0000 0008H<\/code>\uff0c\u518d\u6309\u8865\u7801\u89e3\u91ca\u5c31\u662f 8<\/code>\u3002\u8003\u7814\u9898\u901a\u5e38\u95ee\u201c\u5b58\u653e\u5728\u5bc4\u5b58\u5668\u4e2d\u7684\u673a\u5668\u7801\u201d\u548c\u201c\u5bc4\u5b58\u5668\u7ed3\u679c\u7684\u771f\u503c\u201d\uff0c\u8981\u4ee5\u6709\u9650\u5b57\u957f\u8fd0\u7b97\u540e\u7684\u673a\u5668\u7801\u4e3a\u51c6\u3002<\/p>\n\n\n\n
\n\n\n\n
02 \u9898\uff1ax = -68\uff0cy = -80\uff0c8 \u4f4d\u8865\u7801\u52a0\u51cf\u6cd5<\/h2>\n\n\n\n
\u9898\u76ee\u7ed9\u51fa\uff1a<\/p>\n\n\n\n
x = -68\ny = -80\nA\u3001B\u3001C\u3001D \u90fd\u662f 8 \u4f4d\u5bc4\u5b58\u5668\n\u91c7\u7528\u8865\u7801\u5f62\u5f0f\uff0c\u542b 1 \u4f4d\u7b26\u53f7\u4f4d\n<\/code><\/pre>\n\n\n\n
8 \u4f4d\u8865\u7801\u8868\u793a\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n
-128 ~ 127\n<\/code><\/pre>\n\n\n\n
1\uff09\u5bc4\u5b58\u5668 A \u548c B \u4e2d\u7684\u5185\u5bb9<\/h3>\n\n\n\n
\u5148\u6c42 x = -68<\/code> \u7684 8 \u4f4d\u8865\u7801\u3002<\/p>\n\n\n\n
\u6b63\u6570 68 \u7684\u4e8c\u8fdb\u5236\u4e3a\uff1a<\/p>\n\n\n\n
68 = 0100 0100B = 44H\n<\/code><\/pre>\n\n\n\n
\u8d1f\u6570\u8865\u7801 = \u6b63\u6570\u539f\u7801\u6309\u4f4d\u53d6\u53cd\u518d\u52a0 1\uff1a<\/p>\n\n\n\n
0100 0100\n\u53d6\u53cd\uff1a1011 1011\n\u52a0 1\uff1a1011 1100\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
-68 \u7684\u8865\u7801 = 1011 1100B = BCH\n<\/code><\/pre>\n\n\n\n
\u56e0\u6b64\uff1a<\/p>\n\n\n\n
A = BCH\n<\/code><\/pre>\n\n\n\n
\u518d\u6c42 y = -80<\/code>\u3002<\/p>\n\n\n\n
80 = 0101 0000B = 50H\n<\/code><\/pre>\n\n\n\n
\u53d6\u53cd\u52a0 1\uff1a<\/p>\n\n\n\n
0101 0000\n\u53d6\u53cd\uff1a1010 1111\n\u52a0 1\uff1a1011 0000\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
-80 \u7684\u8865\u7801 = 1011 0000B = B0H\n<\/code><\/pre>\n\n\n\n
\u56e0\u6b64\uff1a<\/p>\n\n\n\n
B = B0H\n<\/code><\/pre>\n\n\n\n
\u7b54\u6848\uff1a<\/p>\n\n\n\n
A = BCH\nB = B0H\n<\/code><\/pre>\n\n\n\n
2\uff09x \u548c y \u76f8\u52a0\uff0c\u7ed3\u679c\u5b58\u653e\u5728 C \u4e2d<\/h3>\n\n\n\n
\u8ba1\u7b97\uff1a<\/p>\n\n\n\n
x + y = -68 + (-80) = -148\n<\/code><\/pre>\n\n\n\n
\u4f46 8 \u4f4d\u8865\u7801\u7684\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n
-128 ~ 127\n<\/code><\/pre>\n\n\n\n
-148<\/code> \u8d85\u51fa\u4e86\u8868\u793a\u8303\u56f4\uff0c\u6240\u4ee5\u4e00\u5b9a\u53d1\u751f\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u7528\u673a\u5668\u7801\u52a0\u6cd5\u9a8c\u8bc1\uff1a<\/p>\n\n\n\n
  BC\n+ B0\n----\n 16C\n<\/code><\/pre>\n\n\n\n
8 \u4f4d\u5bc4\u5b58\u5668\u53ea\u80fd\u4fdd\u5b58\u4f4e 8 \u4f4d\uff1a<\/p>\n\n\n\n
C = 6CH\n<\/code><\/pre>\n\n\n\n
6CH<\/code> \u7684\u4e8c\u8fdb\u5236\u662f\uff1a<\/p>\n\n\n\n
0110 1100\n<\/code><\/pre>\n\n\n\n
\u6700\u9ad8\u4f4d\u662f 0\uff0c\u6240\u4ee5\u7b26\u53f7\u6807\u5fd7\uff1a<\/p>\n\n\n\n
SF = 0\n<\/code><\/pre>\n\n\n\n
\u4e24\u4e2a\u8d1f\u6570\u76f8\u52a0\uff0c\u5374\u5f97\u5230\u4e00\u4e2a\u6b63\u6570\u7ed3\u679c\uff0c\u8fd9\u662f\u5178\u578b\u7684\u8865\u7801\u6ea2\u51fa\uff1a<\/p>\n\n\n\n
OF = 1\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
C = 6CH\nOF = 1\nSF = 0\n<\/code><\/pre>\n\n\n\n
\u6ce8\u610f\uff0cC = 6CH<\/code> \u6309 8 \u4f4d\u8865\u7801\u89e3\u91ca\u662f\u771f\u503c +108<\/code>\uff0c\u8fd9\u4e0d\u662f\u6570\u5b66\u4e0a\u7684 -148<\/code>\uff0c\u800c\u662f\u6ea2\u51fa\u540e\u5bc4\u5b58\u5668\u4e2d\u4fdd\u7559\u4e0b\u6765\u7684\u9519\u8bef\u7ed3\u679c\u3002<\/p>\n\n\n\n
3\uff09x \u548c y \u76f8\u51cf\uff0c\u7ed3\u679c\u5b58\u653e\u5728 D \u4e2d<\/h3>\n\n\n\n
\u8fd9\u91cc\u9ed8\u8ba4\u7406\u89e3\u4e3a\uff1a<\/p>\n\n\n\n
x - y\n<\/code><\/pre>\n\n\n\n
\u5373\uff1a<\/p>\n\n\n\n
-68 - (-80) = 12\n<\/code><\/pre>\n\n\n\n
\u6570\u5b66\u7ed3\u679c 12 \u5728 8 \u4f4d\u8865\u7801\u8303\u56f4\u5185\uff0c\u6240\u4ee5\u4e0d\u4f1a\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u7528\u673a\u5668\u7801\u8ba1\u7b97\uff1a<\/p>\n\n\n\n
x - y = x + (-y)\n<\/code><\/pre>\n\n\n\n
\u5df2\u77e5\uff1a<\/p>\n\n\n\n
y = -80\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\uff1a<\/p>\n\n\n\n
-y = +80\n<\/code><\/pre>\n\n\n\n
+80<\/code> \u7684 8 \u4f4d\u8865\u7801\u662f\uff1a<\/p>\n\n\n\n
0101 0000B = 50H\n<\/code><\/pre>\n\n\n\n
\u4e8e\u662f\uff1a<\/p>\n\n\n\n
  BC\n+ 50\n----\n 10C\n<\/code><\/pre>\n\n\n\n
\u53ea\u4fdd\u7559\u4f4e 8 \u4f4d\uff1a<\/p>\n\n\n\n
D = 0CH\n<\/code><\/pre>\n\n\n\n
0CH<\/code> \u7684\u4e8c\u8fdb\u5236\u662f\uff1a<\/p>\n\n\n\n
0000 1100\n<\/code><\/pre>\n\n\n\n
\u6700\u9ad8\u4f4d\u662f 0\uff0c\u6240\u4ee5\uff1a<\/p>\n\n\n\n
SF = 0\n<\/code><\/pre>\n\n\n\n
\u7ed3\u679c\u6ca1\u6709\u8d85\u51fa -128 ~ 127<\/code>\uff0c\u6240\u4ee5\uff1a<\/p>\n\n\n\n
OF = 0\n<\/code><\/pre>\n\n\n\n
\u56e0\u6b64\uff1a<\/p>\n\n\n\n
D = 0CH\nOF = 0\nSF = 0\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
\u8fd9\u4e24\u9898\u7684\u505a\u9898\u89c4\u5f8b<\/h2>\n\n\n\n
\u7b2c\u4e00\u9898\u770b\u5230 8000 0004H<\/code>\uff0c\u4e0d\u8981\u7acb\u523b\u8bf4\u5b83\u662f\u8d1f\u6570\u3002\u5fc5\u987b\u5148\u770b\u9898\u76ee\u7ed9\u7684\u662f unsigned int<\/code> \u8fd8\u662f int<\/code>\u3002\u540c\u4e00\u4e32\u673a\u5668\u7801\uff0c\u6309 unsigned \u89e3\u91ca\u662f 2147483652<\/code>\uff0c\u6309 int \u8865\u7801\u89e3\u91ca\u662f -2147483644<\/code>\u3002<\/p>\n\n\n\n
\u7b2c\u4e8c\u9898\u5224\u65ad OF \u65f6\uff0c\u4e0d\u8981\u53ea\u770b\u6700\u9ad8\u4f4d\uff0c\u4e5f\u4e0d\u8981\u548c CF \u6df7\u6dc6\u3002\u8865\u7801\u6709\u7b26\u53f7\u52a0\u6cd5\u7684\u6ea2\u51fa\u5224\u65ad\u5e38\u7528\u89c4\u5219\u662f\uff1a<\/p>\n\n\n\n
\u540c\u53f7\u76f8\u52a0\uff0c\u7ed3\u679c\u5f02\u53f7\uff0c\u5219 OF = 1\n\u5f02\u53f7\u76f8\u52a0\uff0c\u4e00\u5b9a\u4e0d\u6ea2\u51fa\n<\/code><\/pre>\n\n\n\n
\u5bf9\u4e8e\u51cf\u6cd5\uff1a<\/p>\n\n\n\n
x - y = x + (-y)\n<\/code><\/pre>\n\n\n\n
\u8f6c\u6210\u52a0\u6cd5\u540e\u518d\u5224\u65ad\u5373\u53ef\u3002<\/p>\n\n\n\n
\u672c\u9898\u7b54\u6848\u6c47\u603b\uff1a<\/p>\n\n\n\n
01 \u9898\uff1a\n\nunsigned int:\nx = 2147483652\n2x \u673a\u5668\u7801 = 0000 0008H\uff0c\u771f\u503c = 8\nx\/2 \u673a\u5668\u7801 = 4000 0002H\uff0c\u771f\u503c = 1073741826\n\nint:\nx = -2147483644\n2x \u673a\u5668\u7801 = 0000 0008H\uff0c\u5bc4\u5b58\u5668\u7ed3\u679c\u771f\u503c = 8\uff0c\u53d1\u751f\u6ea2\u51fa\nx\/2 \u673a\u5668\u7801 = C000 0002H\uff0c\u771f\u503c = -1073741822\n\n\n02 \u9898\uff1a\n\nA = BCH\nB = B0H\n\nx + y:\nC = 6CH\nOF = 1\nSF = 0\n\nx - y:\nD = 0CH\nOF = 0\nSF = 0\n<\/code><\/pre>\n\n\n\n
\u4e58\u6cd5\u6307\u4ee4\u9635\u5217\u4e58\u6cd5\u5b9e\u73b0\u7684\u4e58\u6cd5\u6307\u4ee4\u4ee5\u53caalu\u548c\u4f4d\u79fb\u663e\u793a\u7684\u4e58\u6cd5\u6307\u4ee4\uff0c\u8fd9\u4e9b\u77e5\u8bc6\u70b9\u6211\u4e0d\u592a\u6e05\u695a\uff0c\u80fd\u7ed9\u6211\u8bb2\u89e3\u4e00\u4e0b\u5417\uff1f\u5e76\u4e14\u4e00\u5c0f\u95ee\uff0c\u5f53\u53d6\u4e58\u79ef\u7684\u4f4en\u4f4d\u4f5c\u4e3a\u4e58\u6cd5\u7ed3\u679c\u65f6\uff0c\u5728\u5224\u65ad\u662f\u5426\u6ea2\u51fa\uff0c\u4f60\u65e2\u7136\u53ea\u53d6\u4f4en\u4f4d\uff0c\u90a3\u4e48\u4f60\u53c8\u662f\u5982\u4f55\u77e5\u9053\u9ad8n\u4f4d\u7ed3\u679c\u5462\uff1f\u8fd9\u4e48\u591a\u9053\u9898\u76ee\u4e0b\u6765\uff0c\u65e2\u7136\u6709\u7b26\u53f7\u6574\u6570\u52a0\u51cf\uff0c\u65e0\u7b26\u53f7\u6574\u6570\u52a0\u51cf\uff0c\u8fd9\u56db\u79cd\u8fd0\u7b97\u90fd\u5bf9\u4e8e\u4e00\u4e32\u4e8c\u8fdb\u5236\u4f4d\u8fdb\u884c\u89e3\u91ca\uff0c\u90a3\u4e48\uff0c\u6211\u4eec\u8bfe\u672c\u4e0a\u4ecb\u7ecd\u4e86\u90a3\u4e48\u52a0\u51cf\u6cd5\u8fd0\u7b97\u5668\u662f\u5426\u90fd\u662f\u53ef\u4ee5\u89c6\u4e3a\u8fd9\u79cd\u540c\u4e00\u79cd\uff1f\u5e76\u4e14\u4e58\u9664\u8ba1\u7b97\u5668\u53c8\u8be5\u5982\u4f55\u7406\u89e3\u5462\uff1f\u5c31\u50cf\u5728\u7b2c\u56db\u9898\u91cc\u9762\u63d0\u5230\u4e86\uff0cAlu\u4f4d\u79fb\u5668\uff0c\u5bc4\u5b58\u5668\u53ca\u76f8\u5e94\u63a7\u5236\u903b\u8f91\u8fd9\u4e9b\u5185\u5bb9<\/p>\n\n\n\n
\u53ef\u4ee5\u628a\u8fd9\u90e8\u5206\u7edf\u4e00\u7406\u89e3\u6210\u4e00\u53e5\u8bdd\uff1a\u52a0\u51cf\u4e58\u9664\u8fd0\u7b97\u5668\u5904\u7406\u7684\u672c\u8d28\u90fd\u662f\u4e8c\u8fdb\u5236\u4f4d\u4e32\uff0c\u6240\u8c13\u6709\u7b26\u53f7\u3001\u65e0\u7b26\u53f7\uff0c\u4e3b\u8981\u533a\u522b\u4e0d\u5728\u201c\u600e\u4e48\u52a0\u201d\uff0c\u800c\u5728\u201c\u600e\u4e48\u89e3\u91ca\u7ed3\u679c\u3001\u600e\u4e48\u5224\u65ad\u6ea2\u51fa\u3001\u4e58\u9664\u65f6\u662f\u5426\u9700\u8981\u7b26\u53f7\u6269\u5c55\u548c\u4fee\u6b63\u201d\u3002<\/strong><\/p>\n\n\n\n
\u7b2c 04 \u9898\u91cc\u63d0\u5230\u7684\u201c\u9635\u5217\u4e58\u6cd5\u5668\u201d\u201c\u7528 ALU \u548c\u79fb\u4f4d\u5668\u5b9e\u73b0\u7684\u4e58\u6cd5\u6307\u4ee4\u201d\uff0c\u5176\u5b9e\u662f\u5728\u533a\u5206\u4e24\u79cd\u4e58\u6cd5\u786c\u4ef6\u5b9e\u73b0\u65b9\u5f0f\uff1a\u4e00\u79cd\u504f\u201c\u4e32\u884c\u8fed\u4ee3\u201d\uff0c\u4e00\u79cd\u504f\u201c\u5e76\u884c\u786c\u4ef6\u201d\u3002<\/p>\n\n\n\n
\n\n\n\n
\u4e00\u3001\u5148\u628a\u201cALU\u3001\u79fb\u4f4d\u5668\u3001\u5bc4\u5b58\u5668\u3001\u63a7\u5236\u903b\u8f91\u201d\u653e\u5230\u4e00\u5f20\u56fe\u91cc\u7406\u89e3<\/h2>\n\n\n\n
\u7ec4\u6210\u539f\u7406\u91cc\u8bb2\u8fd0\u7b97\u5668\u65f6\uff0c\u4e0d\u8981\u628a\u201c\u8fd0\u7b97\u5668\u201d\u53ea\u7406\u89e3\u6210\u4e00\u4e2a\u52a0\u6cd5\u5668\u3002\u4e00\u4e2a\u5178\u578b CPU \u5185\u90e8\u6267\u884c\u7b97\u672f\u8fd0\u7b97\uff0c\u5927\u81f4\u6d89\u53ca\u8fd9\u4e9b\u90e8\u4ef6\uff1a<\/p>\n\n\n\n
\u5bc4\u5b58\u5668\uff1a\u4fdd\u5b58\u64cd\u4f5c\u6570\u3001\u90e8\u5206\u7ed3\u679c\u3001\u6700\u7ec8\u7ed3\u679c\nALU\uff1a\u505a\u52a0\u6cd5\u3001\u51cf\u6cd5\u3001\u903b\u8f91\u4e0e\u6216\u975e\u5f02\u6216\u3001\u6bd4\u8f83\u7b49\n\u79fb\u4f4d\u5668\uff1a\u5b8c\u6210\u5de6\u79fb\u3001\u53f3\u79fb\u3001\u7b97\u672f\u79fb\u4f4d\u3001\u903b\u8f91\u79fb\u4f4d\n\u63a7\u5236\u903b\u8f91\uff1a\u51b3\u5b9a\u6bcf\u4e00\u6b65\u8be5\u8c01\u5de5\u4f5c\u3001\u79fb\u51e0\u4f4d\u3001\u52a0\u4e0d\u52a0\u3001\u5faa\u73af\u51e0\u6b21\u3001\u7ed3\u679c\u5199\u5230\u54ea\u91cc\n<\/code><\/pre>\n\n\n\n
\u6bd4\u5982\u8ba1\u7b97\u4e58\u6cd5 x \u00d7 y<\/code>\uff0c\u5982\u679c\u6ca1\u6709\u4e13\u95e8\u4e58\u6cd5\u5668\uff0c\u672c\u8d28\u4e0a\u53ef\u4ee5\u62c6\u6210\uff1a<\/p>\n\n\n\n
\u5224\u65ad\u4e58\u6570\u67d0\u4e00\u4f4d\u662f\u4e0d\u662f 1\n\u5982\u679c\u662f 1\uff0c\u5c31\u628a\u88ab\u4e58\u6570\u5de6\u79fb\u82e5\u5e72\u4f4d\u540e\u52a0\u5230\u90e8\u5206\u79ef\u4e2d\n\u7136\u540e\u7ee7\u7eed\u68c0\u67e5\u4e0b\u4e00\u4f4d\n<\/code><\/pre>\n\n\n\n
\u8fd9\u5c31\u9700\u8981\uff1a<\/p>\n\n\n\n
\u5bc4\u5b58\u5668\u4fdd\u5b58 x\u3001y\u3001\u90e8\u5206\u79ef\n\u79fb\u4f4d\u5668\u8d1f\u8d23 x << i \u6216\u8005\u6574\u4f53\u79fb\u4f4d\nALU \u8d1f\u8d23\u52a0\u6cd5\n\u63a7\u5236\u903b\u8f91\u8d1f\u8d23\u5faa\u73af\u3001\u5224\u65ad\u3001\u8c03\u5ea6\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u9898\u76ee\u91cc\u8bf4\u201c\u57fa\u4e8e ALU\u3001\u4f4d\u79fb\u5668\u3001\u5bc4\u5b58\u5668\u53ca\u76f8\u5e94\u63a7\u5236\u903b\u8f91\u5b9e\u73b0\u4e58\u6cd5\u6307\u4ee4\u201d\uff0c\u610f\u601d\u4e0d\u662f\u8bf4 ALU \u672c\u8eab\u4f1a\u4e58\u6cd5\uff0c\u800c\u662f\u8bf4\uff1a\u4e58\u6cd5\u6307\u4ee4\u867d\u7136\u5728\u6307\u4ee4\u5c42\u9762\u662f\u4e00\u6761\u6307\u4ee4\uff0c\u4f46\u786c\u4ef6\u5185\u90e8\u7528\u591a\u8f6e\u52a0\u6cd5\u548c\u79fb\u4f4d\u628a\u4e58\u6cd5\u505a\u51fa\u6765\u3002<\/strong><\/p>\n\n\n\n
\n\n\n\n
\u4e8c\u3001\u6ca1\u6709\u4e58\u6cd5\u6307\u4ee4\u3001ALU \u79fb\u4f4d\u5b9e\u73b0\u4e58\u6cd5\u6307\u4ee4\u3001\u9635\u5217\u4e58\u6cd5\u5668\uff0c\u8fd9\u4e09\u8005\u7684\u533a\u522b<\/h2>\n\n\n\n
\u8fd9\u4e09\u79cd\u60c5\u51b5\u53ef\u4ee5\u6309\u201c\u8f6f\u4ef6\u5b9e\u73b0\u3001\u4e32\u884c\u786c\u4ef6\u5b9e\u73b0\u3001\u5e76\u884c\u786c\u4ef6\u5b9e\u73b0\u201d\u6765\u7406\u89e3\u3002<\/p>\n\n\n\n
\u7b2c\u4e00\u79cd\u662f\u6ca1\u6709\u4e58\u6cd5\u6307\u4ee4<\/strong>\u3002\u8fd9\u65f6\u7a0b\u5e8f\u91cc\u7684 x * y<\/code> \u4e0d\u80fd\u76f4\u63a5\u7ffb\u8bd1\u6210\u4e00\u6761\u673a\u5668\u4e58\u6cd5\u6307\u4ee4\uff0c\u53ea\u80fd\u7531\u7f16\u8bd1\u5668\u751f\u6210\u4e00\u6bb5\u6307\u4ee4\u5e8f\u5217\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n
\u521d\u59cb\u5316 result = 0\n\u5faa\u73af\u68c0\u67e5 y \u7684\u6bcf\u4e00\u4f4d\n\u5982\u679c\u5f53\u524d\u4f4d\u662f 1\uff0c\u5219 result = result + x\nx \u5de6\u79fb 1 \u4f4d\ny \u53f3\u79fb 1 \u4f4d\n\u5faa\u73af n \u6b21\n<\/code><\/pre>\n\n\n\n
\u8fd9\u65f6\u6bcf\u4e00\u6b65\u90fd\u8981\u53d6\u6307\u3001\u8bd1\u7801\u3001\u6267\u884c\uff0c\u8fd8\u8981\u6709\u5faa\u73af\u8df3\u8f6c\uff0c\u6240\u4ee5\u6162\u3002\u5b83\u662f\u201c\u8f6f\u4ef6\u5c42\u9762\u7528\u5f88\u591a\u6761\u6307\u4ee4\u6a21\u62df\u4e58\u6cd5\u201d\u3002<\/p>\n\n\n\n
\u7b2c\u4e8c\u79cd\u662f\u6709\u4e58\u6cd5\u6307\u4ee4\uff0c\u4f46\u4e58\u6cd5\u6307\u4ee4\u5185\u90e8\u7531 ALU + \u79fb\u4f4d\u5668 + \u5bc4\u5b58\u5668 + \u63a7\u5236\u903b\u8f91\u5b9e\u73b0<\/strong>\u3002\u8fd9\u65f6\u7a0b\u5e8f\u5c42\u9762\u770b\u8d77\u6765\u6709\u4e00\u6761 MUL<\/code> \u6307\u4ee4\uff0c\u4f46 CPU \u5185\u90e8\u4ecd\u7136\u8981\u91cd\u590d\u6267\u884c\u201c\u79fb\u4f4d\u3001\u5224\u65ad\u3001\u52a0\u6cd5\u201d\u7684\u8fc7\u7a0b\u3002\u533a\u522b\u662f\u8fd9\u4e9b\u6b65\u9aa4\u5728 CPU \u63a7\u5236\u903b\u8f91\u5185\u90e8\u5b8c\u6210\uff0c\u4e0d\u9700\u8981\u6bcf\u4e00\u6b65\u90fd\u66b4\u9732\u6210\u7a0b\u5e8f\u4e2d\u7684\u591a\u6761\u666e\u901a\u6307\u4ee4\uff0c\u6240\u4ee5\u6bd4\u8f6f\u4ef6\u6a21\u62df\u5feb\u3002<\/p>\n\n\n\n
\u7b2c\u4e09\u79cd\u662f\u9635\u5217\u4e58\u6cd5\u5668\u5b9e\u73b0\u7684\u4e58\u6cd5\u6307\u4ee4<\/strong>\u3002\u9635\u5217\u4e58\u6cd5\u5668\u662f\u4e13\u95e8\u4e3a\u4e58\u6cd5\u8bbe\u8ba1\u7684\u7ec4\u5408\u903b\u8f91\u6216\u8f83\u9ad8\u5e76\u884c\u5ea6\u786c\u4ef6\u3002\u5b83\u53ef\u4ee5\u540c\u65f6\u751f\u6210\u5f88\u591a\u90e8\u5206\u79ef\uff0c\u5e76\u901a\u8fc7\u52a0\u6cd5\u5668\u9635\u5217\u628a\u8fd9\u4e9b\u90e8\u5206\u79ef\u5feb\u901f\u76f8\u52a0\u3002\u5b83\u7684\u786c\u4ef6\u6210\u672c\u66f4\u9ad8\uff0c\u4f46\u901f\u5ea6\u66f4\u5feb\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u8003\u7814\u9898\u91cc\u5e38\u89c1\u5224\u65ad\u662f\uff1a<\/p>\n\n\n\n
\u6ca1\u6709\u4e58\u6cd5\u6307\u4ee4\uff1a\u6700\u6162\nALU + \u79fb\u4f4d\u5668\u5b9e\u73b0\u4e58\u6cd5\u6307\u4ee4\uff1a\u4e2d\u95f4\n\u9635\u5217\u4e58\u6cd5\u5668\u5b9e\u73b0\u4e58\u6cd5\u6307\u4ee4\uff1a\u6700\u5feb\n<\/code><\/pre>\n\n\n\n
\u8fd9\u91cc\u7684\u201c\u6700\u5feb\u201d\u548c\u201c\u6700\u6162\u201d\u4e0d\u662f\u8bf4\u67d0\u4e2a\u5177\u4f53 CPU \u4e00\u5b9a\u5982\u6b64\uff0c\u800c\u662f\u4ece\u7ec4\u6210\u539f\u7406\u7684\u5178\u578b\u6a21\u578b\u51fa\u53d1\uff1a\u5e76\u884c\u786c\u4ef6\u8d8a\u591a\uff0c\u6267\u884c\u65f6\u95f4\u8d8a\u77ed\uff1b\u8f6f\u4ef6\u5faa\u73af\u8d8a\u591a\uff0c\u6267\u884c\u65f6\u95f4\u8d8a\u957f\u3002<\/strong><\/p>\n\n\n\n
\n\n\n\n
\u4e09\u3001\u7528 ALU \u548c\u79fb\u4f4d\u5668\u5b9e\u73b0\u4e58\u6cd5\uff0c\u672c\u8d28\u662f\u4ec0\u4e48<\/h2>\n\n\n\n
\u4ee5\u65e0\u7b26\u53f7\u4e58\u6cd5\u4e3a\u4f8b\uff0c\u5047\u8bbe\u4e58\u6570 y<\/code> \u662f 8 \u4f4d\uff1a<\/p>\n\n\n\n
y = y7 y6 y5 y4 y3 y2 y1 y0\n<\/code><\/pre>\n\n\n\n
\u90a3\u4e48\uff1a<\/p>\n\n\n\n
x \u00d7 y = y0 \u00d7 x\n      + y1 \u00d7 (x << 1)\n      + y2 \u00d7 (x << 2)\n      + ...\n      + y7 \u00d7 (x << 7)\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u67d0\u4e00\u4f4d yi = 0<\/code>\uff0c\u5bf9\u5e94\u90e8\u5206\u79ef\u5c31\u662f 0\uff1b\u5982\u679c yi = 1<\/code>\uff0c\u5bf9\u5e94\u90e8\u5206\u79ef\u5c31\u662f x << i<\/code>\u3002<\/p>\n\n\n\n
\u4f8b\u5982\uff1a<\/p>\n\n\n\n
13 \u00d7 11\n13 = 0000 1101\n11 = 0000 1011\n<\/code><\/pre>\n\n\n\n
\u56e0\u4e3a 11 = 8 + 2 + 1<\/code>\uff0c\u6240\u4ee5\uff1a<\/p>\n\n\n\n
13 \u00d7 11 = 13 \u00d7 (8 + 2 + 1)\n        = (13 << 3) + (13 << 1) + 13\n        = 104 + 26 + 13\n        = 143\n<\/code><\/pre>\n\n\n\n
\u8fd9\u5c31\u662f\u201c\u79fb\u4f4d + \u52a0\u6cd5\u201d\u5b9e\u73b0\u4e58\u6cd5\u7684\u672c\u8d28\u3002<\/p>\n\n\n\n
\u5982\u679c\u662f\u6709\u7b26\u53f7\u4e58\u6cd5\uff0c\u60c5\u51b5\u4f1a\u590d\u6742\u4e00\u70b9\u3002\u5e38\u89c1\u601d\u8def\u6709\u4e24\u79cd\uff1a<\/p>\n\n\n\n
\u4e00\u79cd\u662f\u5148\u628a\u7b26\u53f7\u62ff\u51fa\u6765\uff0c\u8f6c\u6210\u7edd\u5bf9\u503c\u505a\u65e0\u7b26\u53f7\u4e58\u6cd5\uff0c\u6700\u540e\u6839\u636e\u7b26\u53f7\u4fee\u6b63\u7ed3\u679c\u3002<\/p>\n\n\n\n
\u8d1f \u00d7 \u6b63 = \u8d1f\n\u6b63 \u00d7 \u8d1f = \u8d1f\n\u8d1f \u00d7 \u8d1f = \u6b63\n<\/code><\/pre>\n\n\n\n
\u53e6\u4e00\u79cd\u662f\u76f4\u63a5\u57fa\u4e8e\u8865\u7801\u505a\u4e58\u6cd5\uff0c\u6bd4\u5982 Booth \u7b97\u6cd5\u3002\u8fd9\u7c7b\u7b97\u6cd5\u4f1a\u6839\u636e\u4e58\u6570\u76f8\u90bb\u4f4d\u7684\u53d8\u5316\u51b3\u5b9a\u52a0\u3001\u51cf\u6216\u4e0d\u64cd\u4f5c\uff0c\u9002\u5408\u8865\u7801\u6709\u7b26\u53f7\u4e58\u6cd5\u3002408 \u4e00\u822c\u4e0d\u4f1a\u8981\u6c42\u628a Booth \u4e58\u6cd5\u5168\u8fc7\u7a0b\u80cc\u5f97\u7279\u522b\u673a\u68b0\uff0c\u4f46\u8981\u77e5\u9053\uff1a\u6709\u7b26\u53f7\u4e58\u6cd5\u53ef\u4ee5\u76f4\u63a5\u5728\u8865\u7801\u4f53\u7cfb\u4e0b\u901a\u8fc7\u52a0\u51cf\u548c\u79fb\u4f4d\u5b9e\u73b0\u3002<\/strong><\/p>\n\n\n\n
\n\n\n\n
\u56db\u3001\u9635\u5217\u4e58\u6cd5\u5668\u662f\u4ec0\u4e48\uff0c\u4e3a\u4ec0\u4e48\u5feb<\/h2>\n\n\n\n
\u9635\u5217\u4e58\u6cd5\u5668\u53ef\u4ee5\u7406\u89e3\u4e3a\u201c\u628a\u624b\u7b97\u4e58\u6cd5\u7684\u5f88\u591a\u6b65\u9aa4\u7528\u786c\u4ef6\u5e76\u884c\u94fa\u5f00\u201d\u3002<\/p>\n\n\n\n
\u624b\u7b97\u4e8c\u8fdb\u5236\u4e58\u6cd5\u65f6\uff0c\u4f1a\u5148\u4ea7\u751f\u5f88\u591a\u90e8\u5206\u79ef\uff1a<\/p>\n\n\n\n
        x3 x2 x1 x0\n\u00d7       y3 y2 y1 y0\n--------------------\n        x \u00d7 y0\n      x \u00d7 y1 \u5de6\u79fb 1 \u4f4d\n    x \u00d7 y2 \u5de6\u79fb 2 \u4f4d\n  x \u00d7 y3 \u5de6\u79fb 3 \u4f4d\n--------------------\n        \u6700\u7ec8\u4e58\u79ef\n<\/code><\/pre>\n\n\n\n
\u9635\u5217\u4e58\u6cd5\u5668\u4f1a\u7528\u4e0e\u95e8\u751f\u6210\u90e8\u5206\u79ef\u3002\u4f8b\u5982 xi \u00d7 yj<\/code> \u5728\u4e8c\u8fdb\u5236\u91cc\u5c31\u662f\uff1a<\/p>\n\n\n\n
xi AND yj\n<\/code><\/pre>\n\n\n\n
\u7136\u540e\u7528\u4e00\u5806\u534a\u52a0\u5668\u3001\u5168\u52a0\u5668\u628a\u8fd9\u4e9b\u90e8\u5206\u79ef\u52a0\u8d77\u6765\u3002<\/p>\n\n\n\n
\u5b83\u7684\u4f18\u52bf\u662f\u5e76\u884c\u5ea6\u9ad8\uff0c\u4e0d\u7528\u50cf\u201cALU + \u79fb\u4f4d\u5668\u201d\u90a3\u6837\u4e00\u8f6e\u4e00\u8f6e\u5faa\u73af n \u6b21\u3002\u7f3a\u70b9\u662f\u786c\u4ef6\u9762\u79ef\u5927\u3001\u6210\u672c\u9ad8\u3001\u529f\u8017\u4e5f\u53ef\u80fd\u66f4\u9ad8\u3002<\/p>\n\n\n\n
\u8003\u7814\u4e2d\u5bf9\u9635\u5217\u4e58\u6cd5\u5668\u901a\u5e38\u4e0d\u8003\u7279\u522b\u6df1\u7684\u7535\u8def\u7ec6\u8282\uff0c\u91cd\u70b9\u662f\u77e5\u9053\uff1a<\/p>\n\n\n\n
\u9635\u5217\u4e58\u6cd5\u5668\uff1a\u7528\u5927\u91cf\u786c\u4ef6\u5e76\u884c\u4ea7\u751f\u548c\u7d2f\u52a0\u90e8\u5206\u79ef\uff0c\u901f\u5ea6\u5feb\uff0c\u786c\u4ef6\u590d\u6742\nALU + \u79fb\u4f4d\u5668\u4e58\u6cd5\uff1a\u7528\u5c11\u91cf\u786c\u4ef6\u53cd\u590d\u8fed\u4ee3\uff0c\u901f\u5ea6\u6162\u4e00\u4e9b\uff0c\u786c\u4ef6\u7b80\u5355\n\u8f6f\u4ef6\u6a21\u62df\u4e58\u6cd5\uff1a\u6ca1\u6709\u4e58\u6cd5\u6307\u4ee4\uff0c\u7528\u591a\u6761\u6307\u4ee4\u5b8c\u6210\uff0c\u901a\u5e38\u6700\u6162\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
\u4e94\u3001\u201c\u53ea\u53d6\u4f4e n \u4f4d\u4f5c\u4e3a\u4e58\u6cd5\u7ed3\u679c\u201d\uff0c\u4e3a\u4ec0\u4e48\u8fd8\u80fd\u77e5\u9053\u9ad8 n \u4f4d<\/h2>\n\n\n\n
\u8fd9\u4e2a\u95ee\u9898\u5f88\u5173\u952e\u3002<\/p>\n\n\n\n
\u9898\u76ee\u8bf4\u201c\u53ea\u53d6\u4f4e n \u4f4d\u4f5c\u4e3a\u4e58\u6cd5\u7ed3\u679c\u201d\uff0c\u5e76\u4e0d\u7b49\u4e8e\u786c\u4ef6\u6216\u8005\u5206\u6790\u8fc7\u7a0b\u5b8c\u5168\u4e0d\u77e5\u9053\u9ad8 n \u4f4d\u3002\u8fd9\u91cc\u8981\u5206\u6e05\u4e24\u4e2a\u5c42\u9762\uff1a<\/p>\n\n\n\n
\u5b8c\u6574\u4e58\u79ef\uff1an \u4f4d \u00d7 n \u4f4d\uff0c\u7406\u8bba\u4e0a\u6700\u591a\u9700\u8981 2n \u4f4d\u4fdd\u5b58\n\u8fd4\u56de\u7ed3\u679c\uff1a\u67d0\u4e9b\u6307\u4ee4\u6216 C \u8bed\u8a00\u8868\u8fbe\u5f0f\u53ea\u4fdd\u7559\u4f4e n \u4f4d\n<\/code><\/pre>\n\n\n\n
\u4e5f\u5c31\u662f\u8bf4\uff0c\u5b8c\u6574\u4e58\u79ef\u672c\u6765\u662f 2n \u4f4d\uff0c\u53ea\u662f\u6700\u7ec8\u5199\u56de\u76ee\u6807\u5bc4\u5b58\u5668\u6216\u51fd\u6570\u8fd4\u56de\u503c\u65f6\u53ea\u4fdd\u7559\u4f4e n \u4f4d\u3002<\/strong><\/p>\n\n\n\n
\u4f8b\u5982 32 \u4f4d\u4e58\u6cd5\uff1a<\/p>\n\n\n\n
32 \u4f4d \u00d7 32 \u4f4d = \u6700\u591a 64 \u4f4d\u4e58\u79ef\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u51fd\u6570\u8fd4\u56de\u7c7b\u578b\u662f 32 \u4f4d int<\/code> \u6216 unsigned int<\/code>\uff0c\u90a3\u4e48\u6700\u7ec8\u53ea\u8fd4\u56de\u4f4e 32 \u4f4d\u3002\u4f46\u662f\u5728\u5224\u65ad\u662f\u5426\u6ea2\u51fa\u65f6\uff0c\u8981\u770b\u771f\u5b9e\u6570\u5b66\u4e58\u79ef\u80fd\u4e0d\u80fd\u653e\u8fdb 32 \u4f4d\u3002\u5982\u679c\u4e0d\u80fd\u653e\u8fdb\u53bb\uff0c\u5373\u4f7f\u4f4e 32 \u4f4d\u5b58\u5728\uff0c\u4e5f\u8bf4\u660e\u53d1\u751f\u4e86\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u201c\u5982\u4f55\u77e5\u9053\u9ad8 n \u4f4d\u201d\u6709\u4e09\u79cd\u60c5\u51b5\uff1a<\/p>\n\n\n\n
\u7b2c\u4e00\u79cd\uff0c\u4ece\u9898\u76ee\u5206\u6790\u89d2\u5ea6\uff0c\u53ef\u4ee5\u76f4\u63a5\u7b97\u5b8c\u6574 2n \u4f4d\u4e58\u79ef\u3002\u7ec4\u6210\u539f\u7406\u9898\u76ee\u901a\u5e38\u8981\u6c42\u4ece\u673a\u5668\u6570\u548c\u771f\u503c\u89d2\u5ea6\u5206\u6790\uff0c\u4e0d\u662f\u8bf4\u7a0b\u5e8f\u8fd0\u884c\u65f6\u4e00\u5b9a\u628a\u9ad8 n \u4f4d\u8fd4\u56de\u7ed9\u7528\u6237\u3002<\/p>\n\n\n\n
\u7b2c\u4e8c\u79cd\uff0c\u4ece\u786c\u4ef6\u89d2\u5ea6\uff0c\u5f88\u591a\u4e58\u6cd5\u6307\u4ee4\u5185\u90e8\u786e\u5b9e\u4f1a\u4ea7\u751f 2n \u4f4d\u4e58\u79ef\uff0c\u53ea\u662f\u6700\u540e\u6839\u636e\u6307\u4ee4\u683c\u5f0f\u4fdd\u5b58\u5176\u4e2d\u4e00\u90e8\u5206\u3002\u6709\u4e9b\u4f53\u7cfb\u7ed3\u6784\u8fd8\u4f1a\u628a\u9ad8\u4f4d\u548c\u4f4e\u4f4d\u5206\u522b\u653e\u5230\u4e24\u4e2a\u5bc4\u5b58\u5668\u4e2d\u3002\u4f8b\u5982\u5e38\u89c1\u6559\u6750\u6a21\u578b\u91cc\u7ecf\u5e38\u9ed8\u8ba4\u4e58\u79ef\u5bc4\u5b58\u5668\u53ef\u4ee5\u4fdd\u5b58\u53cc\u500d\u5b57\u957f\u7ed3\u679c\u3002<\/p>\n\n\n\n
\u7b2c\u4e09\u79cd\uff0c\u5982\u679c\u67d0\u4e2a\u673a\u5668\u771f\u7684\u53ea\u5b9e\u73b0\u201c\u6a21 2\u207f \u4e58\u6cd5\u201d\uff0c\u53ea\u7ed9\u51fa\u4f4e n \u4f4d\uff0c\u4e14\u6ca1\u6709\u989d\u5916\u6807\u5fd7\u4f4d\u6216\u9ad8\u4f4d\u5bc4\u5b58\u5668\uff0c\u90a3\u4e48\u5355\u9760\u6700\u7ec8\u4f4e n \u4f4d\u786e\u5b9e\u65e0\u6cd5\u8fd8\u539f\u9ad8 n \u4f4d\u3002\u56e0\u4e3a\u4e0d\u540c\u7684\u5b8c\u6574\u4e58\u79ef\u53ef\u80fd\u5177\u6709\u76f8\u540c\u7684\u4f4e n \u4f4d\u3002<\/p>\n\n\n\n
\u4f8b\u5982 8 \u4f4d\u7ed3\u679c\u53ea\u770b\u5230\uff1a<\/p>\n\n\n\n
\u4f4e 8 \u4f4d = FEH\n<\/code><\/pre>\n\n\n\n
\u5b83\u53ef\u80fd\u6765\u81ea\uff1a<\/p>\n\n\n\n
00FEH\n01FEH\n02FEH\nFFFEH\n...\n<\/code><\/pre>\n\n\n\n
\u4f4e 8 \u4f4d\u76f8\u540c\uff0c\u9ad8 8 \u4f4d\u53ef\u4ee5\u4e0d\u540c\u3002\u6240\u4ee5\u5982\u679c\u786c\u4ef6\u5b8c\u5168\u4e22\u5f03\u9ad8\u4f4d\u4e14\u4e0d\u63d0\u4f9b\u4efb\u4f55\u6ea2\u51fa\u6807\u5fd7\uff0c\u8fd0\u884c\u540e\u5c31\u4e0d\u80fd\u4ece\u4f4e n \u4f4d\u552f\u4e00\u5224\u65ad\u9ad8 n \u4f4d\u662f\u4ec0\u4e48\u3002<\/p>\n\n\n\n
\u4f46\u8003\u7814\u9898\u91cc\u95ee\u201c\u5f53\u53d6\u4f4e n \u4f4d\u4f5c\u4e3a\u7ed3\u679c\u65f6\u5982\u4f55\u5224\u65ad\u6ea2\u51fa\u201d\uff0c\u9ed8\u8ba4\u662f\u4ece\u5b8c\u6574 2n \u4f4d\u4e58\u79ef\u5224\u65ad\uff0c\u6216\u8005\u5047\u8bbe\u786c\u4ef6\u5728\u4ea7\u751f\u5b8c\u6574\u4e58\u79ef\/\u90e8\u5206\u79ef\u8fc7\u7a0b\u4e2d\u6709\u80fd\u529b\u68c0\u6d4b\u88ab\u820d\u5f03\u7684\u9ad8\u4f4d\u3002<\/p>\n\n\n\n
\n\n\n\n
\u516d\u3001\u65e0\u7b26\u53f7\u4e58\u6cd5\u53ea\u53d6\u4f4e n \u4f4d\u65f6\uff0c\u600e\u4e48\u5224\u65ad\u6ea2\u51fa<\/h2>\n\n\n\n
\u65e0\u7b26\u53f7\u6570\u7684 n \u4f4d\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n
0 ~ 2\u207f - 1\n<\/code><\/pre>\n\n\n\n
\u4e24\u4e2a n \u4f4d\u65e0\u7b26\u53f7\u6570\u76f8\u4e58\uff0c\u771f\u5b9e\u7ed3\u679c\u6700\u591a\u9700\u8981 2n \u4f4d\u3002<\/p>\n\n\n\n
\u5982\u679c\u5b8c\u6574 2n \u4f4d\u4e58\u79ef\u7684\u9ad8 n \u4f4d\u5168\u4e3a 0\uff0c\u8bf4\u660e\u4e58\u79ef\u6ca1\u6709\u8d85\u8fc7 n \u4f4d\u8303\u56f4\uff0c\u53ef\u4ee5\u5b89\u5168\u653e\u8fdb\u4f4e n \u4f4d\u3002<\/p>\n\n\n\n
\u9ad8 n \u4f4d = 000...000  \u2192 \u65e0\u7b26\u53f7\u4e58\u6cd5\u4e0d\u6ea2\u51fa\n\u9ad8 n \u4f4d \u2260 000...000 \u2192 \u65e0\u7b26\u53f7\u4e58\u6cd5\u6ea2\u51fa\n<\/code><\/pre>\n\n\n\n
\u4f8b\u5982 8 \u4f4d\u65e0\u7b26\u53f7\u4e58\u6cd5\uff1a<\/p>\n\n\n\n
20 \u00d7 10 = 200\n<\/code><\/pre>\n\n\n\n
200 \u53ef\u4ee5\u7528 8 \u4f4d\u65e0\u7b26\u53f7\u6570\u8868\u793a\uff1a<\/p>\n\n\n\n
\u5b8c\u6574 16 \u4f4d\uff1a0000 0000 1100 1000\n\u9ad8 8 \u4f4d\uff1a0000 0000\n\u4f4e 8 \u4f4d\uff1a1100 1000\n<\/code><\/pre>\n\n\n\n
\u9ad8 8 \u4f4d\u5168 0\uff0c\u6240\u4ee5\u4e0d\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u518d\u5982\uff1a<\/p>\n\n\n\n
200 \u00d7 2 = 400\n<\/code><\/pre>\n\n\n\n
400 \u8d85\u8fc7 8 \u4f4d\u65e0\u7b26\u53f7\u8303\u56f4 0 ~ 255<\/code>\uff1a<\/p>\n\n\n\n
\u5b8c\u6574 16 \u4f4d\uff1a0000 0001 1001 0000\n\u9ad8 8 \u4f4d\uff1a0000 0001\n\u4f4e 8 \u4f4d\uff1a1001 0000\n<\/code><\/pre>\n\n\n\n
\u9ad8 8 \u4f4d\u4e0d\u5168\u4e3a 0\uff0c\u6240\u4ee5\u65e0\u7b26\u53f7\u4e58\u6cd5\u6ea2\u51fa\u3002\u6700\u7ec8\u82e5\u53ea\u4fdd\u5b58\u4f4e 8 \u4f4d\uff0c\u4f1a\u5f97\u5230 90H = 144<\/code>\uff0c\u4f46\u771f\u5b9e\u7ed3\u679c 400 \u7684\u9ad8\u4f4d\u4fe1\u606f\u4e22\u4e86\u3002<\/p>\n\n\n\n
\n\n\n\n
\u4e03\u3001\u6709\u7b26\u53f7\u4e58\u6cd5\u53ea\u53d6\u4f4e n \u4f4d\u65f6\uff0c\u600e\u4e48\u5224\u65ad\u6ea2\u51fa<\/h2>\n\n\n\n
\u6709\u7b26\u53f7\u8865\u7801 n \u4f4d\u8303\u56f4\u662f\uff1a<\/p>\n\n\n\n
-2\u207f\u207b\u00b9 ~ 2\u207f\u207b\u00b9 - 1\n<\/code><\/pre>\n\n\n\n
\u6709\u7b26\u53f7\u4e58\u6cd5\u5224\u65ad\u6ea2\u51fa\u4e0d\u80fd\u7b80\u5355\u770b\u9ad8 n \u4f4d\u662f\u5426\u5168 0\uff0c\u56e0\u4e3a\u8d1f\u6570\u7684\u6b63\u786e\u6269\u5c55\u9ad8\u4f4d\u5e94\u8be5\u662f\u5168 1\u3002<\/p>\n\n\n\n
\u89c4\u5219\u662f\uff1a<\/p>\n\n\n\n
\u6709\u7b26\u53f7\u4e58\u6cd5\u4e0d\u6ea2\u51fa \u21d4 \u5b8c\u6574 2n \u4f4d\u4e58\u79ef\u7684\u9ad8 n \u4f4d\uff0c\u5fc5\u987b\u662f\u4f4e n \u4f4d\u7b26\u53f7\u4f4d\u7684\u7b26\u53f7\u6269\u5c55\n<\/code><\/pre>\n\n\n\n
\u6362\u53e5\u8bdd\u8bf4\uff1a<\/p>\n\n\n\n
\u5982\u679c\u4f4e n \u4f4d\u7684\u6700\u9ad8\u4f4d\u662f 0\uff0c\u8bf4\u660e\u4f4e n \u4f4d\u8868\u793a\u975e\u8d1f\u6570\uff0c\u90a3\u4e48\u9ad8 n \u4f4d\u5e94\u8be5\u5168\u662f 0\u3002<\/p>\n\n\n\n
\u9ad8 n \u4f4d\u5168 0\uff0c\u4f4e n \u4f4d\u6700\u9ad8\u4f4d\u4e3a 0 \u2192 \u4e0d\u6ea2\u51fa\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u4f4e n \u4f4d\u7684\u6700\u9ad8\u4f4d\u662f 1\uff0c\u8bf4\u660e\u4f4e n \u4f4d\u8868\u793a\u8d1f\u6570\uff0c\u90a3\u4e48\u9ad8 n \u4f4d\u5e94\u8be5\u5168\u662f 1\u3002<\/p>\n\n\n\n
\u9ad8 n \u4f4d\u5168 1\uff0c\u4f4e n \u4f4d\u6700\u9ad8\u4f4d\u4e3a 1 \u2192 \u4e0d\u6ea2\u51fa\n<\/code><\/pre>\n\n\n\n
\u5426\u5219\u5c31\u662f\u6709\u7b26\u53f7\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u4e3e\u4e00\u4e2a 8 \u4f4d\u4f8b\u5b50\uff1a<\/p>\n\n\n\n
-2 \u00d7 3 = -6\n<\/code><\/pre>\n\n\n\n
8 \u4f4d\u4f4e\u4f4d\u7ed3\u679c\u662f\uff1a<\/p>\n\n\n\n
FAH = 1111 1010\n<\/code><\/pre>\n\n\n\n
\u5b8c\u6574 16 \u4f4d\u8865\u7801\u4e58\u79ef\u5e94\u8be5\u662f\uff1a<\/p>\n\n\n\n
1111 1111 1111 1010\n<\/code><\/pre>\n\n\n\n
\u9ad8 8 \u4f4d\u662f 1111 1111<\/code>\uff0c\u6b63\u597d\u662f\u4f4e 8 \u4f4d\u7b26\u53f7\u4f4d 1<\/code> \u7684\u6269\u5c55\uff0c\u6240\u4ee5\u4e0d\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u518d\u770b\uff1a<\/p>\n\n\n\n
100 \u00d7 2 = 200\n<\/code><\/pre>\n\n\n\n
200 \u8d85\u8fc7 8 \u4f4d\u6709\u7b26\u53f7\u8303\u56f4 -128 ~ 127<\/code>\u3002\u5b8c\u6574 16 \u4f4d\u662f\uff1a<\/p>\n\n\n\n
0000 0000 1100 1000\n<\/code><\/pre>\n\n\n\n
\u4f4e 8 \u4f4d\u662f\uff1a<\/p>\n\n\n\n
1100 1000\n<\/code><\/pre>\n\n\n\n
\u4f4e 8 \u4f4d\u6700\u9ad8\u4f4d\u662f 1\uff0c\u6309 8 \u4f4d\u8865\u7801\u4f1a\u89e3\u91ca\u6210\u8d1f\u6570 -56<\/code>\u3002\u5982\u679c\u5b83\u771f\u7684\u662f\u4e00\u4e2a\u5408\u6cd5\u7684 8 \u4f4d\u8d1f\u6570\u7ed3\u679c\uff0c\u90a3\u4e48\u9ad8 8 \u4f4d\u5e94\u8be5\u5168\u4e3a 1\uff0c\u4f46\u73b0\u5728\u9ad8 8 \u4f4d\u662f\u5168 0\u3002<\/p>\n\n\n\n
\u9ad8 8 \u4f4d = 0000 0000\n\u4f4e 8 \u4f4d\u7b26\u53f7\u4f4d = 1\n\u4e0d\u7b26\u5408\u7b26\u53f7\u6269\u5c55 \u2192 \u6709\u7b26\u53f7\u6ea2\u51fa\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u672c\u9898\u7b2c 04 \u9898\u91cc\uff1a<\/p>\n\n\n\n
n = 32\nx = 2\u00b3\u00b9 - 1 = 7FFFFFFFH\ny = 2\n<\/code><\/pre>\n\n\n\n
\u5b8c\u6574 64 \u4f4d\u4e58\u79ef\uff1a<\/p>\n\n\n\n
00000000 FFFFFFFE\n<\/code><\/pre>\n\n\n\n
\u5bf9\u65e0\u7b26\u53f7\u4e58\u6cd5\uff1a<\/p>\n\n\n\n
\u9ad8 32 \u4f4d = 00000000\n<\/code><\/pre>\n\n\n\n
\u9ad8 32 \u4f4d\u5168 0\uff0c\u6240\u4ee5\u65e0\u7b26\u53f7\u7ed3\u679c\u653e\u5165 32 \u4f4d\u4e0d\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u5bf9\u6709\u7b26\u53f7\u4e58\u6cd5\uff1a<\/p>\n\n\n\n
\u4f4e 32 \u4f4d = FFFFFFFE\n\u4f4e 32 \u4f4d\u7b26\u53f7\u4f4d = 1\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u5b83\u4f5c\u4e3a\u5408\u6cd5\u7684 32 \u4f4d\u6709\u7b26\u53f7\u7ed3\u679c\uff0c64 \u4f4d\u5b8c\u6574\u4e58\u79ef\u7684\u9ad8 32 \u4f4d\u5e94\u8be5\u662f\uff1a<\/p>\n\n\n\n
FFFFFFFF\n<\/code><\/pre>\n\n\n\n
\u4f46\u5b9e\u9645\u9ad8 32 \u4f4d\u662f\uff1a<\/p>\n\n\n\n
00000000\n<\/code><\/pre>\n\n\n\n
\u4e0d\u7b26\u5408\u7b26\u53f7\u6269\u5c55\uff0c\u6240\u4ee5\u6709\u7b26\u53f7\u4e58\u6cd5\u6ea2\u51fa\u3002<\/p>\n\n\n\n
\u8fd9\u4e5f\u662f\u8fd9\u9898\u7684\u6838\u5fc3\u9677\u9631\uff1a\u540c\u6837\u7684\u4f4e 32 \u4f4d FFFFFFFEH<\/code>\uff0c\u4f5c\u4e3a unsigned \u662f 4294967294\uff0c\u6ca1\u6ea2\u51fa\uff1b\u4f5c\u4e3a signed \u662f -2\uff0c\u4f46\u771f\u5b9e\u6570\u5b66\u7ed3\u679c\u662f 4294967294\uff0c\u6240\u4ee5 signed \u6ea2\u51fa\u3002<\/strong><\/p>\n\n\n\n
\n\n\n\n
\u516b\u3001\u52a0\u51cf\u6cd5\u8fd0\u7b97\u5668\uff1a\u6709\u7b26\u53f7\u548c\u65e0\u7b26\u53f7\u662f\u4e0d\u662f\u53ef\u4ee5\u770b\u6210\u540c\u4e00\u4e2a\uff1f<\/h2>\n\n\n\n
\u53ef\u4ee5\u3002\u5bf9\u4e8e\u52a0\u6cd5\u548c\u51cf\u6cd5\uff0c\u6838\u5fc3\u7ed3\u8bba\u5c31\u662f\uff1a<\/p>\n\n\n\n
\u6709\u7b26\u53f7\u6574\u6570\u52a0\u6cd5\n\u65e0\u7b26\u53f7\u6574\u6570\u52a0\u6cd5\n\u6709\u7b26\u53f7\u6574\u6570\u51cf\u6cd5\n\u65e0\u7b26\u53f7\u6574\u6570\u51cf\u6cd5\n\n\u5e95\u5c42\u90fd\u53ef\u4ee5\u7528\u540c\u4e00\u4e2a\u4e8c\u8fdb\u5236\u52a0\u6cd5\u5668\u5b8c\u6210\u3002\n<\/code><\/pre>\n\n\n\n
\u539f\u56e0\u662f\u8865\u7801\u4f53\u7cfb\u6709\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u6027\u8d28\uff1a\u8865\u7801\u52a0\u51cf\u6cd5\u548c\u65e0\u7b26\u53f7\u6a21 2\u207f \u52a0\u51cf\u6cd5\u5728\u4f4d\u7ea7\u8fd0\u7b97\u89c4\u5219\u4e0a\u5b8c\u5168\u4e00\u81f4\u3002<\/strong><\/p>\n\n\n\n
\u6bd4\u5982 8 \u4f4d\u52a0\u6cd5\u5668\u505a\u7684\u4e8b\u60c5\u53ea\u662f\uff1a<\/p>\n\n\n\n
\u628a\u4e24\u4e2a 8 \u4f4d\u4e8c\u8fdb\u5236\u4f4d\u4e32\u76f8\u52a0\n\u4fdd\u7559\u4f4e 8 \u4f4d\n\u4ea7\u751f\u8fdb\u4f4d\u6807\u5fd7\n<\/code><\/pre>\n\n\n\n
\u5b83\u4e0d\u5173\u5fc3\u8fd9\u4e24\u4e2a\u4f4d\u4e32\u662f signed \u8fd8\u662f unsigned\u3002<\/p>\n\n\n\n
\u4f8b\u5982\uff1a<\/p>\n\n\n\n
1000 0110 + 1111 0110 = 1 0111 1100\n<\/code><\/pre>\n\n\n\n
8 \u4f4d\u52a0\u6cd5\u5668\u53ea\u77e5\u9053\uff1a<\/p>\n\n\n\n
\u4f4e 8 \u4f4d = 0111 1100\n\u6700\u9ad8\u4f4d\u5411\u5916\u6709\u8fdb\u4f4d\n<\/code><\/pre>\n\n\n\n
\u81f3\u4e8e\u5b83\u8868\u793a\u4ec0\u4e48\uff0c\u8981\u770b\u89e3\u91ca\u65b9\u5f0f\uff1a<\/p>\n\n\n\n
unsigned: 134 + 246 = 380\uff0c\u4f4e 8 \u4f4d\u4e3a 124\uff0c\u6709\u8fdb\u4f4d\nsigned: -122 + (-10) = -132\uff0c\u4f4e 8 \u4f4d\u4e3a +124\uff0c\u6709\u7b26\u53f7\u6ea2\u51fa\n<\/code><\/pre>\n\n\n\n
\u540c\u4e00\u4e2a\u52a0\u6cd5\u7ed3\u679c\uff0c\u5206\u522b\u4ea7\u751f\u4e0d\u540c\u7684\u201c\u8bed\u4e49\u5224\u65ad\u201d\u3002<\/p>\n\n\n\n
\u5bf9\u65e0\u7b26\u53f7\u52a0\u6cd5\uff0c\u4e3b\u8981\u770b CF\uff1a<\/p>\n\n\n\n
CF = 1 \u901a\u5e38\u8868\u793a\u6700\u9ad8\u4f4d\u4ea7\u751f\u8fdb\u4f4d\uff0c\u5373\u65e0\u7b26\u53f7\u52a0\u6cd5\u8d85\u8fc7\u8303\u56f4\n<\/code><\/pre>\n\n\n\n
\u5bf9\u6709\u7b26\u53f7\u52a0\u6cd5\uff0c\u4e3b\u8981\u770b OF\uff1a<\/p>\n\n\n\n
OF = 1 \u8868\u793a\u8865\u7801\u6709\u7b26\u53f7\u6ea2\u51fa\n<\/code><\/pre>\n\n\n\n
\u5224\u65ad\u6709\u7b26\u53f7\u52a0\u6cd5\u6ea2\u51fa\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u662f\uff1a<\/p>\n\n\n\n
\u540c\u53f7\u76f8\u52a0\uff0c\u7ed3\u679c\u5f02\u53f7 \u2192 \u6ea2\u51fa\n\u5f02\u53f7\u76f8\u52a0 \u2192 \u4e0d\u53ef\u80fd\u6ea2\u51fa\n<\/code><\/pre>\n\n\n\n
\u51cf\u6cd5\u4e5f\u53ef\u4ee5\u7528\u540c\u4e00\u4e2a\u52a0\u6cd5\u5668\uff0c\u56e0\u4e3a\uff1a<\/p>\n\n\n\n
A - B = A + (-B)\n<\/code><\/pre>\n\n\n\n
\u800c\u8865\u7801\u91cc\u7684 -B<\/code> \u53ef\u4ee5\u901a\u8fc7\uff1a<\/p>\n\n\n\n
B \u6309\u4f4d\u53d6\u53cd\uff0c\u518d\u52a0 1\n<\/code><\/pre>\n\n\n\n
\u5b9e\u73b0\u3002\u6240\u4ee5\u51cf\u6cd5\u5668\u901a\u5e38\u53ef\u4ee5\u8bbe\u8ba1\u6210\u201c\u52a0\u6cd5\u5668 + \u53d6\u53cd\u63a7\u5236 + \u4f4e\u4f4d\u8fdb\u4f4d 1\u201d\u3002<\/p>\n\n\n\n
\u4e5f\u5c31\u662f\u8bf4\uff0c\u52a0\u6cd5\u5668\u4e0d\u9700\u8981\u77e5\u9053\u201c\u8fd9\u662f signed \u8fd8\u662f unsigned\u201d\u3002\u771f\u6b63\u4e0d\u540c\u7684\u662f\u7ed3\u679c\u51fa\u6765\u4e4b\u540e\uff1a<\/p>\n\n\n\n
\u65e0\u7b26\u53f7\u51cf\u6cd5\u770b\u662f\u5426\u501f\u4f4d\uff0c\u5e38\u7528 CF \u5224\u65ad\n\u6709\u7b26\u53f7\u51cf\u6cd5\u770b OF \u5224\u65ad\u8865\u7801\u6ea2\u51fa\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u8bfe\u672c\u91cc\u7684\u201c\u52a0\u51cf\u6cd5\u8fd0\u7b97\u5668\u201d\u5b8c\u5168\u53ef\u4ee5\u7406\u89e3\u6210\u540c\u4e00\u4e2a\u5e95\u5c42\u90e8\u4ef6\uff1a\u540c\u4e00\u4e2a\u52a0\u6cd5\u5668\u5b8c\u6210\u4f4d\u4e32\u52a0\u51cf\uff0c\u4e0d\u540c\u6807\u5fd7\u4f4d\u8d1f\u8d23\u4e0d\u540c\u8bed\u4e49\u89e3\u91ca\u3002<\/strong><\/p>\n\n\n\n
\n\n\n\n
\u4e5d\u3001\u4e58\u9664\u8fd0\u7b97\u5668\u662f\u5426\u4e5f\u80fd\u50cf\u52a0\u51cf\u6cd5\u4e00\u6837\u5b8c\u5168\u89c6\u4e3a\u540c\u4e00\u4e2a\uff1f<\/h2>\n\n\n\n
\u8fd9\u91cc\u8981\u7a0d\u5fae\u533a\u5206\u3002<\/p>\n\n\n\n
\u5bf9\u201c\u53ea\u53d6\u4f4e n \u4f4d\u7684\u4e58\u6cd5\u7ed3\u679c\u201d\u800c\u8a00\uff0c\u6709\u4e00\u4e2a\u91cd\u8981\u7ed3\u8bba\uff1a<\/p>\n\n\n\n
n \u4f4d\u4e58\u6cd5\u53ea\u770b\u4f4e n \u4f4d\u65f6\uff0c\u6709\u7b26\u53f7\u4e58\u6cd5\u548c\u65e0\u7b26\u53f7\u4e58\u6cd5\u7684\u4f4e n \u4f4d\u7ed3\u679c\u76f8\u540c\u3002\n<\/code><\/pre>\n\n\n\n
\u539f\u56e0\u662f\u4f4e n \u4f4d\u672c\u8d28\u4e0a\u90fd\u662f\u6a21 2\u207f \u7684\u4e58\u79ef\u3002<\/p>\n\n\n\n
\u4f8b\u5982\uff1a<\/p>\n\n\n\n
8 \u4f4d\u4e0b\uff1a\nFEH \u53ef\u4ee5\u89e3\u91ca\u4e3a unsigned 254\uff0c\u4e5f\u53ef\u4ee5\u89e3\u91ca\u4e3a signed -2\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u53ea\u770b\u4f4e 8 \u4f4d\uff0c\u5f88\u591a\u65f6\u5019 signed \u548c unsigned \u7684\u4e58\u79ef\u4f4e\u4f4d\u662f\u4e00\u6837\u7684\u3002<\/p>\n\n\n\n
\u4f46\u662f\uff0c\u5982\u679c\u8981\u5f97\u5230\u5b8c\u6574 2n \u4f4d\u4e58\u79ef\uff0c\u9ad8 n \u4f4d\u5c31\u53ef\u80fd\u4e0d\u540c\uff0c\u56e0\u4e3a signed \u4e58\u6cd5\u9700\u8981\u7b26\u53f7\u6269\u5c55\uff0cunsigned \u4e58\u6cd5\u9700\u8981\u96f6\u6269\u5c55\u3002<\/p>\n\n\n\n
\u6bd4\u5982 8 \u4f4d\uff1a<\/p>\n\n\n\n
FEH \u00d7 02H\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u6309\u65e0\u7b26\u53f7\uff1a<\/p>\n\n\n\n
254 \u00d7 2 = 508\n\u5b8c\u6574 16 \u4f4d = 01FCH\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u6309\u6709\u7b26\u53f7\uff1a<\/p>\n\n\n\n
-2 \u00d7 2 = -4\n\u5b8c\u6574 16 \u4f4d = FFFCH\n<\/code><\/pre>\n\n\n\n
\u4f4e 8 \u4f4d\u90fd\u662f\uff1a<\/p>\n\n\n\n
FCH\n<\/code><\/pre>\n\n\n\n
\u4f46\u9ad8 8 \u4f4d\u4e0d\u540c\uff1a<\/p>\n\n\n\n
\u65e0\u7b26\u53f7\u9ad8 8 \u4f4d = 01H\n\u6709\u7b26\u53f7\u9ad8 8 \u4f4d = FFH\n<\/code><\/pre>\n\n\n\n
\u6240\u4ee5\u4e58\u6cd5\u7684\u7ed3\u8bba\u662f\uff1a<\/p>\n\n\n\n
\u53ea\u8981\u4f4e n \u4f4d\uff1a\u6709\u7b26\u53f7\/\u65e0\u7b26\u53f7\u4e58\u6cd5\u7ed3\u679c\u4f4e\u4f4d\u76f8\u540c\n\u8981\u5b8c\u6574 2n \u4f4d\uff1a\u6709\u7b26\u53f7\/\u65e0\u7b26\u53f7\u4e58\u6cd5\u7ed3\u679c\u53ef\u80fd\u4e0d\u540c\n\u6ea2\u51fa\u5224\u65ad\uff1a\u6709\u7b26\u53f7\/\u65e0\u7b26\u53f7\u89c4\u5219\u4e0d\u540c\n<\/code><\/pre>\n\n\n\n
\u8fd9\u548c\u52a0\u51cf\u6cd5\u7c7b\u4f3c\uff0c\u4f46\u53c8\u6bd4\u52a0\u51cf\u6cd5\u591a\u4e00\u5c42\u590d\u6742\u6027\uff1a\u4e58\u6cd5\u5929\u7136\u53ef\u80fd\u4ea7\u751f\u53cc\u500d\u5b57\u957f\u7ed3\u679c\u3002<\/strong><\/p>\n\n\n\n
\n\n\n\n
\u5341\u3001\u9664\u6cd5\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u7b80\u5355\u5b8c\u5168\u7c7b\u6bd4\u52a0\u6cd5\u5668<\/h2>\n\n\n\n
\u9664\u6cd5\u6bd4\u4e58\u6cd5\u66f4\u8981\u6ce8\u610f signed \u548c unsigned \u7684\u5dee\u5f02\u3002<\/p>\n\n\n\n
\u56e0\u4e3a\u9664\u6cd5\u4e0d\u662f\u7b80\u5355\u7684\u6a21 2\u207f \u4f4d\u7ea7\u8fd0\u7b97\u3002\u52a0\u6cd5\u3001\u51cf\u6cd5\u3001\u4e58\u6cd5\u7684\u4f4e n \u4f4d\u90fd\u548c\u6a21 2\u207f \u8fd0\u7b97\u5173\u7cfb\u5f88\u5f3a\uff0c\u800c\u9664\u6cd5\u4f1a\u6d89\u53ca\u5546\u548c\u4f59\u6570\uff0c signed \u548c unsigned \u89e3\u91ca\u4f1a\u76f4\u63a5\u6539\u53d8\u6570\u5b66\u610f\u4e49\u3002<\/p>\n\n\n\n
\u6bd4\u5982\u540c\u4e00\u4e32 8 \u4f4d\uff1a<\/p>\n\n\n\n
1111 1110\n<\/code><\/pre>\n\n\n\n
\u6309 unsigned \u662f\uff1a<\/p>\n\n\n\n
254\n<\/code><\/pre>\n\n\n\n
\u6309 signed \u662f\uff1a<\/p>\n\n\n\n
-2\n<\/code><\/pre>\n\n\n\n
\u90a3\u4e48\uff1a<\/p>\n\n\n\n
254 \u00f7 2 = 127\n-2 \u00f7 2 = -1\n<\/code><\/pre>\n\n\n\n
\u5546\u5b8c\u5168\u4e0d\u540c\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u9664\u6cd5\u5668\u901a\u5e38\u9700\u8981\u533a\u5206\uff1a<\/p>\n\n\n\n
\u65e0\u7b26\u53f7\u9664\u6cd5\uff1a\u6309\u975e\u8d1f\u6574\u6570\u505a\u9664\u6cd5\n\u6709\u7b26\u53f7\u9664\u6cd5\uff1a\u5148\u5904\u7406\u7b26\u53f7\uff0c\u6216\u7528\u8865\u7801\u9664\u6cd5\u89c4\u5219\u5904\u7406\uff0c\u5546\u548c\u4f59\u6570\u8fd8\u8981\u7b26\u5408\u7b26\u53f7\u89c4\u5219\n<\/code><\/pre>\n\n\n\n
\u5728\u6307\u4ee4\u7cfb\u7edf\u4e2d\uff0c\u5f88\u591a\u673a\u5668\u4f1a\u533a\u5206 signed divide \u548c unsigned divide\uff0c\u4f8b\u5982\u6709\u7b26\u53f7\u9664\u6cd5\u6307\u4ee4\u3001\u65e0\u7b26\u53f7\u9664\u6cd5\u6307\u4ee4\u3002\u4e58\u6cd5\u4e5f\u5e38\u5e38\u533a\u5206\u6709\u7b26\u53f7\u4e58\u6cd5\u548c\u65e0\u7b26\u53f7\u4e58\u6cd5\uff0c\u5c24\u5176\u662f\u5f53\u7ed3\u679c\u8981\u4fdd\u7559\u9ad8\u4f4d\u6216\u53cc\u500d\u5b57\u957f\u65f6\u3002<\/p>\n\n\n\n
\u56e0\u6b64\u8003\u7814\u91cc\u53ef\u4ee5\u8fd9\u6837\u8bb0\uff1a<\/p>\n\n\n\n
\u52a0\u51cf\u6cd5\uff1a\u5e95\u5c42\u52a0\u6cd5\u5668\u5b8c\u5168\u53ef\u5171\u7528\uff0csigned\/unsigned \u4e3b\u8981\u533a\u522b\u5728\u6807\u5fd7\u4f4d\u89e3\u91ca\n\u4e58\u6cd5\uff1a\u4f4e n \u4f4d\u53ef\u5171\u7528\u601d\u8def\uff0c\u4f46\u5b8c\u6574 2n \u4f4d\u548c\u6ea2\u51fa\u5224\u65ad\u8981\u533a\u5206 signed\/unsigned\n\u9664\u6cd5\uff1asigned\/unsigned \u7684\u6570\u5b66\u610f\u4e49\u4e0d\u540c\uff0c\u901a\u5e38\u9700\u8981\u533a\u5206\u5904\u7406\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
\u5341\u4e00\u3001\u8fd9\u7c7b\u9898\u7684\u5feb\u901f\u505a\u9898\u6846\u67b6<\/h2>\n\n\n\n
\u9047\u5230\u8fd9\u79cd\u9898\uff0c\u5148\u4e0d\u8981\u6025\u7740\u80cc\u786c\u4ef6\u540d\u8bcd\u3002\u5148\u5224\u65ad\u9898\u76ee\u95ee\u7684\u662f\u54ea\u4e00\u5c42\u3002<\/p>\n\n\n\n
\u5982\u679c\u95ee\u201c\u80fd\u4e0d\u80fd\u7528\u540c\u4e00\u4e2a\u52a0\u6cd5\u5668\u5b9e\u73b0\u6709\u7b26\u53f7\/\u65e0\u7b26\u53f7\u52a0\u51cf\u201d\uff0c\u7b54\u6848\u57fa\u672c\u662f\uff1a<\/p>\n\n\n\n
\u80fd\u3002\u56e0\u4e3a\u5e95\u5c42\u90fd\u662f\u4e8c\u8fdb\u5236\u52a0\u6cd5\uff0c\u51cf\u6cd5\u8f6c\u52a0\u6cd5\u3002\n\u533a\u522b\u5728\u89e3\u91ca\u65b9\u5f0f\u548c\u6ea2\u51fa\u6807\u5fd7\u3002\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u95ee\u201c\u65e0\u7b26\u53f7\u52a0\u51cf\u662f\u5426\u6ea2\u51fa\u201d\uff0c\u91cd\u70b9\u770b\uff1a<\/p>\n\n\n\n
\u52a0\u6cd5\uff1a\u6700\u9ad8\u4f4d\u662f\u5426\u4ea7\u751f\u8fdb\u4f4d\uff0cCF\n\u51cf\u6cd5\uff1a\u662f\u5426\u53d1\u751f\u501f\u4f4d\uff0cCF\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u95ee\u201c\u6709\u7b26\u53f7\u52a0\u51cf\u662f\u5426\u6ea2\u51fa\u201d\uff0c\u91cd\u70b9\u770b\uff1a<\/p>\n\n\n\n
\u52a0\u6cd5\uff1a\u540c\u53f7\u76f8\u52a0\u7ed3\u679c\u5f02\u53f7\n\u51cf\u6cd5\uff1aA - B\uff0cA \u548c B \u5f02\u53f7\u4e14\u7ed3\u679c\u7b26\u53f7\u4e0e A \u4e0d\u540c\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u95ee\u201c\u4e58\u6cd5\u6307\u4ee4\u600e\u4e48\u5b9e\u73b0\u201d\uff0c\u4f18\u5148\u6309\u4e09\u5c42\u56de\u7b54\uff1a<\/p>\n\n\n\n
\u6ca1\u6709\u4e58\u6cd5\u6307\u4ee4\uff1a\u8f6f\u4ef6\u7528\u52a0\u6cd5\u3001\u79fb\u4f4d\u3001\u5faa\u73af\u6a21\u62df\nALU + \u79fb\u4f4d\u5668\u5b9e\u73b0\uff1a\u4e00\u6761\u4e58\u6cd5\u6307\u4ee4\u5185\u90e8\u8fed\u4ee3\u5b8c\u6210\u52a0\u6cd5\u548c\u79fb\u4f4d\n\u9635\u5217\u4e58\u6cd5\u5668\u5b9e\u73b0\uff1a\u4e13\u7528\u5e76\u884c\u786c\u4ef6\u751f\u6210\u548c\u7d2f\u52a0\u90e8\u5206\u79ef\uff0c\u901f\u5ea6\u6700\u5feb\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u95ee\u201c\u53ea\u53d6\u4f4e n \u4f4d\u5982\u4f55\u5224\u65ad\u4e58\u6cd5\u6ea2\u51fa\u201d\uff0c\u5c31\u770b\u5b8c\u6574 2n \u4f4d\u4e58\u79ef\uff1a<\/p>\n\n\n\n
\u65e0\u7b26\u53f7\uff1a\u9ad8 n \u4f4d\u5168 0 \u2192 \u4e0d\u6ea2\u51fa\uff1b\u5426\u5219\u6ea2\u51fa\n\u6709\u7b26\u53f7\uff1a\u9ad8 n \u4f4d\u662f\u4f4e n \u4f4d\u7b26\u53f7\u4f4d\u7684\u6269\u5c55 \u2192 \u4e0d\u6ea2\u51fa\uff1b\u5426\u5219\u6ea2\u51fa\n<\/code><\/pre>\n\n\n\n
\u6700\u540e\u8981\u7279\u522b\u8bb0\u4f4f\u7b2c 04 \u9898\u8fd9\u79cd\u9677\u9631\uff1a<\/p>\n\n\n\n
\u5b8c\u6574\u4e58\u79ef = 00000000 FFFFFFFE\n\nunsigned\uff1a\n\u9ad8 32 \u4f4d\u5168 0\uff0c\u6240\u4ee5\u4e0d\u6ea2\u51fa\n\nsigned\uff1a\n\u4f4e 32 \u4f4d\u7b26\u53f7\u4f4d\u4e3a 1\uff0c\u4f46\u9ad8 32 \u4f4d\u4e0d\u662f\u5168 1\uff0c\u6240\u4ee5\u6ea2\u51fa\n<\/code><\/pre>\n\n\n\n
\u8fd9\u91cc\u4e0d\u662f\u201c\u4f4e 32 \u4f4d\u4e00\u6837\uff0c\u6240\u4ee5\u6ea2\u51fa\u60c5\u51b5\u4e00\u6837\u201d\u3002\u6070\u6070\u76f8\u53cd\uff0c\u4f4e\u4f4d\u4e00\u6837\uff0c\u4f46\u89e3\u91ca\u65b9\u5f0f\u548c\u6ea2\u51fa\u5224\u65ad\u4e0d\u540c\uff0c\u624d\u662f\u8fd9\u7c7b\u9898\u7684\u8003\u70b9\u3002<\/strong><\/p>\n\n\n\n
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