{"rsdb":{"rid":"372444","subhead":"","postdate":"0","aid":"261447","fid":"49","uid":"1","topic":"1","content":"<div id=\"cnblogs_post_body\" class=\"blogpost-body cnblogs-markdown\"> \n <p>\u6700\u8fd1\u5728\u8bfb<a href=https:\/\/www.cppentry.com\/list.php?fid=49 style=text-decoration:underline;font-size:14px;color:#F70968; target=_blank>C++<\/a> primer\u7684\u65f6\u5019\uff0c\u53d1\u73b0p32\u4e0a\u5199\u9053\uff1a\u5f53\u6211\u4eec\u8d4b\u7ed9\u65e0\u7b26\u53f7\u7c7b\u578b\u4e00\u4e2a\u8d85\u51fa\u5b83\u8868\u793a\u8303\u56f4\u7684\u503c\u65f6\uff0c\u7ed3\u679c\u662f\u521d\u59cb\u503c\u5bf9\u65e0\u7b26\u53f7\u7c7b\u578b\u8868\u793a\u6570\u503c\u603b\u6570\u53d6\u6a21\u540e\u7684\u4f59\u6570\u3002\u56e0\u6b64\uff0c\u628a-1\u8d4b\u503c\u7ed98\u6bd4\u7279\u5927\u5c0f\u7684unsigned char\u6240\u5f97\u7684\u7ed3\u679c\u662f255\u3002<\/p> \n <h1 id=\"\u600e\u4e48\u53d6\u6a21\">-1\u600e\u4e48\u53d6\u6a21\uff1f<\/h1> \n <p>&nbsp;&nbsp;\u8fd9\u91cc\u5148\u660e\u786e\u4e00\u4e0b\u53d6\u6a21\u548c\u53d6\u4f59\u7684\u533a\u522b\uff1a\uff08\u767e\u5ea6\u767e\u79d1\uff09<br \/> &nbsp;&nbsp;\u53d6\u6a21\u8fd0\u7b97\uff08\u201cModule Operation\u201d\uff09\u548c\u53d6\u4f59\u8fd0\u7b97\uff08\u201cComplementation \u201d\uff09\u4e24\u4e2a\u6982\u5ff5\u6709\u91cd\u53e0\u7684\u90e8\u5206\u4f46\u53c8\u4e0d\u5b8c\u5168\u4e00\u81f4\u3002\u4e3b\u8981\u7684\u533a\u522b\u5728\u4e8e\u5bf9\u8d1f\u6574\u6570\u8fdb\u884c\u9664\u6cd5\u8fd0\u7b97\u65f6\u64cd\u4f5c\u4e0d\u540c\u3002\u53d6\u6a21\u4e3b\u8981\u662f\u7528\u4e8e\u8ba1\u7b97\u673a\u672f\u8bed\u4e2d\u3002\u53d6\u4f59\u5219\u66f4\u591a\u662f\u6570\u5b66\u6982\u5ff5\u3002\u6a21\u8fd0\u7b97\u5728\u6570\u8bba\u548c\u7a0b\u5e8f\u8bbe\u8ba1\u4e2d\u90fd\u6709\u7740\u5e7f\u6cdb\u7684\u5e94\u7528\u3002<br \/> &nbsp;&nbsp;\u5bf9\u4e8e\u6574\u578b\u6570a\uff0cb\u6765\u8bf4\uff0c\u53d6\u6a21\u8fd0\u7b97\u6216\u8005\u6c42\u4f59\u8fd0\u7b97\u7684\u65b9\u6cd5\u90fd\u662f\uff1a<br \/> 1.\u6c42 \u6574\u6570\u5546\uff1a c = a\/b;<br \/> 2.\u8ba1\u7b97\u6a21\u6216\u8005\u4f59\u6570\uff1a r = a - c<em>b.<br \/> &nbsp;&nbsp;\u6c42\u6a21\u8fd0\u7b97\u548c\u6c42\u4f59\u8fd0\u7b97\u5728\u7b2c\u4e00\u6b65\u4e0d\u540c: \u53d6\u4f59\u8fd0\u7b97\u5728\u53d6c\u7684\u503c\u65f6\uff0c\u54110 \u65b9\u5411\u820d\u5165(fix()\u51fd\u6570)\uff1b\u800c\u53d6\u6a21\u8fd0\u7b97\u5728\u8ba1\u7b97c\u7684\u503c\u65f6\uff0c\u5411\u8d1f\u65e0\u7a77\u65b9\u5411\u820d\u5165(floor()\u51fd\u6570)\u3002<br \/> \u4f8b\u5982\u8ba1\u7b97\uff1a-7 Mod 4<br \/> \u90a3\u4e48\uff1aa = -7\uff1bb = 4\uff1b<br \/> &nbsp;&nbsp;\u7b2c\u4e00\u6b65\uff1a\u6c42\u6574\u6570\u5546c\uff0c\u5982\u8fdb\u884c\u6c42\u6a21\u8fd0\u7b97c = -2\uff08\u5411\u8d1f\u65e0\u7a77\u65b9\u5411\u820d\u5165\uff09\uff0c\u6c42\u4f59c = -1\uff08\u54110\u65b9\u5411\u820d\u5165\uff09\uff1b<br \/> &nbsp;&nbsp;\u7b2c\u4e8c\u6b65\uff1a\u8ba1\u7b97\u6a21\u548c\u4f59\u6570\u7684\u516c\u5f0f\u76f8\u540c\uff0c\u4f46\u56e0c\u7684\u503c\u4e0d\u540c\uff0c\u6c42\u6a21\u65f6r = 1\uff0c\u6c42\u4f59\u65f6r = -3\u3002<br \/> &nbsp;&nbsp;\u5f52\u7eb3\uff1a\u5f53a\u548cb\u7b26\u53f7\u4e00\u81f4\u65f6\uff0c\u6c42\u6a21\u8fd0\u7b97\u548c\u6c42\u4f59\u8fd0\u7b97\u6240\u5f97\u7684c\u7684\u503c\u4e00\u81f4\uff0c\u56e0\u6b64\u7ed3\u679c\u4e00\u81f4\u3002<br \/> &nbsp;&nbsp;\u5f53\u7b26\u53f7\u4e0d\u4e00\u81f4\u65f6\uff0c\u7ed3\u679c\u4e0d\u4e00\u6837\u3002\u6c42\u6a21\u8fd0\u7b97\u7ed3\u679c\u7684\u7b26\u53f7\u548cb\u4e00\u81f4\uff0c\u6c42\u4f59\u8fd0\u7b97\u7ed3\u679c\u7684\u7b26\u53f7\u548ca\u4e00\u81f4\u3002<br \/> &nbsp;&nbsp;\u90a3\u4e48-1\u5bf9256\u53d6\u6a21\u7684\u8fc7\u7a0b\u5c31\u662f\uff1a<br \/> &nbsp;&nbsp;c=-1\/256=-1\uff1b<br \/> &nbsp;&nbsp;r =-1 -(-1 <\/em>256) =255(\u5982\u679c\u662f\u53d6\u4f59\uff0cr=-1)<\/p> \n <h1 id=\"\u4ece\u8ba1\u7b97\u673a\u5b58\u50a8\u7684\u89d2\u5ea6\">\u4ece\u8ba1\u7b97\u673a\u5b58\u50a8\u7684\u89d2\u5ea6<\/h1> \n <p>&nbsp;&nbsp;\u5728\u8ba1\u7b97\u673a\u4e2d\u6570\u503c\u6309\u8865\u7801\u5b58\u50a8\u7684\uff0c-1\u7684\u539f\u7801\u662f10000001(\u6709\u7b26\u53f78\u4f4d)\uff0c\u8865\u7801\uff1a11111111\u3002\u6240\u4ee5\u76f4\u63a5\u8d4b\u503c\u7ed9unsigned char, 11111111\u7b49\u4e8e255\u3002\u5176\u5b9e\u76f8\u5f53\u4e8e\u7c7b\u578b\u8f6c\u6362\u7684\u65f6\u5019\u4ec0\u4e48\u90fd\u6ca1\u5e72\uff0c\u76f4\u63a5\u610f\u4e49\u5c31\u8f6c\u6362\u6210\u4e86255\uff0c\u4f46\u662f\u4ece\u6570\u5b66\u7684\u89d2\u5ea6\u4e0a\u5c31\u662f\u5bf9256\u53d6\u6a21\u3002<\/p> \n<\/div>","orderid":"0","title":"C++\u8d1f\u6570\u7c7b\u578b\u8f6c\u6362,-1\u5bf9256\u53d6\u6a21","smalltitle":"","mid":"0","fname":"c++\u7f16\u7a0b\u57fa\u7840","special_id":"0","bak_id":"0","info":"0","hits":"68","pages":"1","comments":"0","posttime":"2019-09-19 11:10:22","list":"1568862622","username":"admin","author":"","copyfrom":"","copyfromurl":"","titlecolor":"","fonttype":"0","titleicon":"0","picurl":"https:\/\/www.cppentry.com\/upload_files\/","ispic":"0","yz":"1","yzer":"","yztime":"0","levels":"0","levelstime":"0","keywords":"<A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=%B8%BA%CA%FD' target=_blank>\u8d1f\u6570<\/A> <A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=%C0%E0%D0%CD' target=_blank>\u7c7b\u578b<\/A> <A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=%D7%AA%BB%BB' target=_blank>\u8f6c\u6362<\/A> <A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=256' target=_blank>256<\/A> <A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=%C8%A1%C4%A3' target=_blank>\u53d6\u6a21<\/A>","jumpurl":"","iframeurl":"","style":"","template":"a:3:{s:4:\"head\";s:0:\"\";s:4:\"foot\";s:0:\"\";s:8:\"bencandy\";s:0:\"\";}","target":"0","ip":"14.17.22.32","lastfid":"0","money":"0","buyuser":"","passwd":"","allowdown":"","allowview":"","editer":"","edittime":"0","begintime":"0","endtime":"0","description":"C++\u8d1f\u6570\u7c7b\u578b\u8f6c\u6362,-1\u5bf9256\u53d6\u6a21","lastview":"1712094216","digg_num":"0","digg_time":"0","forbidcomment":"0","ifvote":"0","heart":"","htmlname":"","city_id":"0"},"page":"1"}