{"id":110048,"date":"2026-09-25T19:01:51","date_gmt":"2026-09-25T11:01:51","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/110048.html"},"modified":"2026-09-25T19:01:51","modified_gmt":"2026-09-25T11:01:51","slug":"%e3%80%90c-%e8%af%ad%e8%a8%80%e3%80%91%e6%93%8d%e4%bd%9c%e7%ac%a6%e8%af%a6%e8%a7%a3%ef%bc%88%e4%b8%8a%ef%bc%89%ef%bc%9a%e8%bf%9b%e5%88%b6%e3%80%81%e8%a1%a5%e7%a0%81%e3%80%81%e7%a7%bb%e4%bd%8d%e4%b8%8e","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/110048.html","title":{"rendered":"\u3010C \u8bed\u8a00\u3011\u64cd\u4f5c\u7b26\u8be6\u89e3\uff08\u4e0a\uff09\uff1a\u8fdb\u5236\u3001\u8865\u7801\u3001\u79fb\u4f4d\u4e0e\u4f4d\u8fd0\u7b97\u5b9e\u6218"},"content":{"rendered":"

🔥 \u661f\u5149\u7f16\u8bd1\u8005<\/b><\/font> \u00b7 \u4e2a\u4eba\u4e3b\u9875<\/p>\n

📚 \u5b66\u4e60\u4e13\u680f：<\/b><\/font> \u300aC\/C++ \u6210\u957f\u7b14\u8bb0\u300b<\/font> \u00b7 \u300aLinux \u5b9e\u8df5\u624b\u518c\u300b<\/font> \u00b7 \u300a\u6570\u636e\u7ed3\u6784\u4e0e\u7b97\u6cd5\u300b<\/font><\/p>\n

🌄 \u5411\u4e91\u7aef\u98de\u626c，\u7f16\u8bd1\u5c5e\u4e8e\u81ea\u5df1\u7684\u4ee3\u7801\u661f\u6cb3\u3002<\/b><\/font><\/p>\n

\n

\u2615 \u5199\u5728\u5f00\u7bc7<\/font><\/h4>\n

\u2003\u2003\u4f60\u597d，\u8fd9\u91cc\u662f \u661f\u5149\u7f16\u8bd1\u8005<\/b><\/font>\u3002<\/font><\/p>\n

\u2003\u2003\u8fd9\u91cc\u8bb0\u5f55\u6211\u5728 C\/C++\u3001Linux\u3001\u6570\u636e\u7ed3\u6784\u4e0e\u7b97\u6cd5<\/b><\/font> \u5b66\u4e60\u4e2d\u9047\u5230\u7684\u771f\u5b9e\u95ee\u9898\u3001\u4eb2\u624b\u9a8c\u8bc1\u8fc7\u7684\u4ee3\u7801，\u4ee5\u53ca\u90a3\u4e9b\u5bb9\u6613\u88ab\u5ffd\u7565\u7684\u5b9e\u73b0\u7ec6\u8282\u3002<\/font><\/p>\n

\u2003\u2003\u6bd4\u8d77\u7b80\u5355\u7f57\u5217\u7ed3\u8bba，\u6211\u66f4\u613f\u610f\u4ece\u95ee\u9898\u51fa\u53d1，\u628a\u4e00\u4e2a\u77e5\u8bc6\u70b9\u7684\u6765\u7531\u8bb2\u6e05\u695a，\u628a\u201c\u4e3a\u4ec0\u4e48\u4f1a\u8fd9\u6837<\/b><\/font>\u201d\u548c\u201c\u5e94\u8be5\u600e\u6837\u89e3\u51b3<\/b><\/font>\u201d\u8bf4\u660e\u767d，\u8ba9\u6bcf\u4e00\u6b21\u8e29\u5751\u90fd\u6c89\u6dc0\u6210\u53ef\u4ee5\u590d\u7528\u7684\u7ecf\u9a8c\u3002<\/font><\/p>\n

\u2003\u2003\u5982\u679c\u8fd9\u7bc7\u8bb0\u5f55\u80fd\u5e2e\u4f60\u5c11\u7ed5\u4e00\u70b9\u8def<\/b><\/font>，\u6216\u8ba9\u67d0\u4e2a\u6a21\u7cca\u7684\u5730\u65b9\u5ffd\u7136\u53d8\u5f97\u6e05\u6670，\u90a3\u4e48\u8fd9\u6b21\u5206\u4eab\u4fbf\u6709\u4e86\u610f\u4e49\u3002\u613f\u6211\u4eec\u5728\u4e00\u6b21\u6b21\u9605\u8bfb\u3001\u7f16\u8bd1\u4e0e\u8c03\u8bd5\u4e2d\u7a33\u6b65\u5411\u524d，\u6162\u6162\u642d\u8d77\u5c5e\u4e8e\u81ea\u5df1\u7684\u6280\u672f\u4e16\u754c\u3002<\/font><\/p>\n

\"\u661f\u5149\u7f16\u8bd1\u8005\u535a\u5ba2\u5f00\u573a\u52a8\u753b\" <\/p>\n

\n

<\/h2>\n

🔥 \u672c\u6587\u5b9a\u4f4d：\u4ece\u4e00\u4e32\u4e8c\u8fdb\u5236\u5230\u5e95\u8868\u793a\u4ec0\u4e48\u5f00\u59cb，\u9010\u6b65\u8bfb\u61c2 <<\u3001>>\u3001&\u3001|\u3001^\u3001~，\u6700\u540e\u7528\u7edf\u8ba1\u4e8c\u8fdb\u5236 1 \u7684\u4e2a\u6570\u548c\u6309\u4f4d\u7f6e\u4f4d\u7ec3\u624b\u3002<\/p>\n

💡 \u5b66\u4e60\u76ee\u6807：\u4f1a\u505a\u4e8c\u3001\u516b\u3001\u5341\u3001\u5341\u516d\u8fdb\u5236\u8f6c\u6362；\u7406\u89e3\u5e38\u89c1\u8865\u7801\u6a21\u578b\u4e0e C \u6807\u51c6\u7684\u8fb9\u754c；\u80fd\u5b89\u5168\u5730\u5199\u65e0\u7b26\u53f7\u79fb\u4f4d\u548c\u4f4d\u63a9\u7801；\u77e5\u9053\u4e3a\u4ec0\u4e48\u67d0\u4e9b\u201c\u770b\u8d77\u6765\u80fd\u8fd0\u884c\u201d\u7684\u4f4d\u8fd0\u7b97\u4ee3\u7801\u5e76\u4e0d\u53ef\u9760\u3002<\/p>\n

📌 \u9605\u8bfb\u8bf4\u660e：\u6839\u636e\u8bfe\u7a0b PDF\u300a\u7b2c10\u8bb2：\u64cd\u4f5c\u7b26\u8be6\u89e3\u300b\u7b2c 1～5 \u8282\u6574\u7406\u3002\u793a\u610f\u56fe\u7528\u5e38\u89c1\u7684 8 \u4f4d\u6216 32 \u4f4d\u6a21\u578b\u5e2e\u52a9\u7406\u89e3；\u9664\u975e\u53e6\u884c\u8bf4\u660e，\u793a\u4f8b\u6309 C11 \u7f16\u5199\u3002\u4e0b\u7bc7\u7ee7\u7eed\u8bb2\u9017\u53f7\u8868\u8fbe\u5f0f\u3001[]\u3001()\u3001\u7ed3\u6784\u6210\u5458\u8bbf\u95ee\u3001\u7c7b\u578b\u8f6c\u6362\u4e0e\u8868\u8fbe\u5f0f\u6c42\u503c\u3002<\/p>\n

\n

\u6587\u7ae0\u76ee\u5f55<\/h3>\n
    \n
  • \u4e00\u3001\u5148\u628a\u64cd\u4f5c\u7b26\u653e\u5230\u4e00\u5f20\u5730\u56fe\u91cc<\/li>\n
  • \u4e8c\u3001\u4e0d\u540c\u8fdb\u5236\u53ea\u662f\u540c\u4e00\u4e2a\u6570\u7684\u4e0d\u540c\u5199\u6cd5<\/li>\n
  • \u4e09\u3001\u539f\u7801\u3001\u53cd\u7801\u3001\u8865\u7801：\u5206\u6e05\u6559\u5b66\u6a21\u578b\u4e0e\u8bed\u8a00\u89c4\u5219<\/li>\n
  • \u56db\u3001\u79fb\u4f4d\u64cd\u4f5c\u7b26：\u5148\u770b\u7c7b\u578b，\u518d\u770b\u79fb\u52a8\u4f4d\u6570<\/li>\n
  • \u4e94\u3001\u56db\u4e2a\u4f4d\u64cd\u4f5c\u7b26\u600e\u6837\u9010\u4f4d\u8ba1\u7b97<\/li>\n
  • \u516d\u3001\u5b9e\u6218\u4e00：\u7edf\u8ba1\u4e8c\u8fdb\u5236\u4e2d 1 \u7684\u4e2a\u6570<\/li>\n
  • \u4e03\u3001\u5b9e\u6218\u4e8c：\u6307\u5b9a\u4e8c\u8fdb\u5236\u4f4d\u7684\u7f6e 1\u3001\u6e05 0 \u4e0e\u7ffb\u8f6c<\/li>\n
  • \u516b\u3001\u5e38\u89c1\u8bef\u533a\u4e0e\u7ec3\u4e60<\/li>\n
  • \u603b\u7ed3<\/li>\n<\/ul>\n
    \n

    \u4e00\u3001\u5148\u628a\u64cd\u4f5c\u7b26\u653e\u5230\u4e00\u5f20\u5730\u56fe\u91cc<\/h3>\n

    C \u8bed\u8a00\u64cd\u4f5c\u7b26\u5f88\u591a，\u5148\u6309\u7528\u9014\u5efa\u7acb\u5370\u8c61，\u9047\u5230\u8868\u8fbe\u5f0f\u65f6\u518d\u95ee\u201c\u5b83\u5904\u7406\u7684\u662f\u6570\u503c\u3001\u903b\u8f91，\u8fd8\u662f\u4e8c\u8fdb\u5236\u4f4d\u201d\u3002<\/p>\n\n\u7c7b\u522b\u5e38\u89c1\u64cd\u4f5c\u7b26\u5178\u578b\u7528\u9014<\/tr>\n\n\n\n\n\n\n\n
    \u7b97\u672f<\/td>\n+ – * \/ %<\/td>\n\u56db\u5219\u8fd0\u7b97\u3001\u6c42\u4f59<\/td>\n<\/tr>\n
    \u79fb\u4f4d<\/td>\n<< >><\/td>\n\u79fb\u52a8\u6574\u6570\u7684\u4e8c\u8fdb\u5236\u4f4d<\/td>\n<\/tr>\n
    \u6309\u4f4d<\/td>\n`&<\/td>\n^ ~`<\/td>\n<\/tr>\n
    \u8d4b\u503c<\/td>\n`= += -= *= \/= %= <<= >>= &=<\/td>\n= ^=`<\/td>\n<\/tr>\n
    \u6bd4\u8f83\u4e0e\u903b\u8f91<\/td>\n`< <= > >= == != &&<\/td>\n<\/td>\n<\/tr>\n
    \u5176\u4ed6<\/td>\n?: , [] () . -> sizeof<\/td>\n\u6761\u4ef6\u9009\u62e9\u3001\u987a\u5e8f\u7ec4\u5408\u3001\u8bbf\u95ee\u4e0e\u8c03\u7528\u7b49<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u540c\u4e00\u4e2a\u7b26\u53f7\u53ef\u80fd\u627f\u62c5\u4e0d\u540c\u89d2\u8272\u3002\u4f8b\u5982 & \u5728 a & b \u4e2d\u662f\u6309\u4f4d\u4e0e，\u5728 &a \u4e2d\u662f\u53d6\u5730\u5740；* \u53ef\u4ee5\u8868\u793a\u4e58\u6cd5，\u4e5f\u53ef\u4ee5\u5728\u6307\u9488\u8868\u8fbe\u5f0f\u4e2d\u8868\u793a\u95f4\u63a5\u8bbf\u95ee\u3002\u5224\u65ad\u65f6\u5e94\u770b\u64cd\u4f5c\u6570\u548c\u8bed\u6cd5\u4f4d\u7f6e\u3002<\/p>\n

    \u8fd9\u4e00\u7bc7\u96c6\u4e2d\u5904\u7406\u4e0e\u4e8c\u8fdb\u5236\u76f8\u5173\u7684\u64cd\u4f5c\u7b26\u3002\u5148\u5b66\u8fdb\u5236，\u662f\u56e0\u4e3a\u4f4d\u8fd0\u7b97\u4e0d\u662f\u201c\u9b54\u6cd5\u7b26\u53f7\u201d：\u5b83\u5904\u7406\u7684\u5c31\u662f\u6574\u6570\u503c\u4e2d\u7684\u5404\u4e2a\u4f4d\u3002<\/p>\n

    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    \n

    \u4e8c\u3001\u4e0d\u540c\u8fdb\u5236\u53ea\u662f\u540c\u4e00\u4e2a\u6570\u7684\u4e0d\u540c\u5199\u6cd5<\/h3>\n

    \u5341\u8fdb\u5236 15\u3001\u4e8c\u8fdb\u5236 1111\u3001\u516b\u8fdb\u5236 17\u3001\u5341\u516d\u8fdb\u5236 F \u8bf4\u7684\u662f\u540c\u4e00\u4e2a\u6570\u503c\u3002\u533a\u522b\u662f\u6bcf\u4f4d\u53ef\u7528\u7684\u6570\u5b57\u548c\u6bcf\u4f4d\u6743\u91cd\u3002<\/p>\n

    2.1 \u7528\u201c\u4f4d\u6743\u201d\u8bfb\u4e8c\u8fdb\u5236<\/h4>\n

    \u5341\u8fdb\u5236\u7684 123 \u53ef\u4ee5\u5c55\u5f00\u4e3a 1\u00d710\u00b2 + 2\u00d710\u00b9 + 3\u00d710\u2070\u3002\u4e8c\u8fdb\u5236\u628a\u5e95\u6570\u6362\u6210 2：<\/p>\n

    (1101)\u2082 = 1\u00d72\u00b3 + 1\u00d72\u00b2 + 0\u00d72\u00b9 + 1\u00d72\u2070
    \n = 8 + 4 + 0 + 1
    \n = (13)\u2081\u2080<\/p>\n

    \u4ece\u53f3\u5411\u5de6\u4f9d\u6b21\u662f 1\u30012\u30014\u30018\u300116\u2026\u2026，\u6bcf\u5f80\u5de6\u4e00\u4f4d，\u6743\u91cd\u7ffb\u500d\u3002\u8ba1\u7b97\u65f6\u5148\u5199\u6743\u91cd，\u518d\u628a\u4e3a 1 \u7684\u4f4d\u7f6e\u52a0\u8d77\u6765，\u5c31\u4e0d\u5bb9\u6613\u6f0f\u4f4d\u3002<\/p>\n

    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    2.2 \u5341\u8fdb\u5236\u600e\u6837\u8f6c\u6210\u4e8c\u8fdb\u5236<\/h4>\n

    \u4ee5\u5341\u8fdb\u5236 13 \u4e3a\u4f8b，\u53cd\u590d\u9664\u4ee5 2，\u8bb0\u5f55\u4f59\u6570，\u6700\u540e\u5012\u5e8f\u8bfb\u53d6：<\/p>\n

    13 \u00f7 2 = 6 \u4f59 1
    \n 6 \u00f7 2 = 3 \u4f59 0
    \n 3 \u00f7 2 = 1 \u4f59 1
    \n 1 \u00f7 2 = 0 \u4f59 1<\/p>\n

    \u4ece\u4e0b\u5f80\u4e0a：1101<\/p>\n

    \u8fd9\u4e2a\u65b9\u6cd5\u9002\u5408\u975e\u8d1f\u6574\u6570\u3002\u5199\u7a0b\u5e8f\u65f6\u8fd8\u8981\u533a\u5206\u201c\u6570\u503c\u8f6c\u6362\u201d\u548c\u201c\u628a\u4e00\u4e2a\u6574\u6570\u4ee5\u67d0\u79cd\u683c\u5f0f\u8f93\u51fa\u201d；\u5e95\u5c42\u6570\u503c\u6ca1\u6709\u201c\u81ea\u5df1\u5e26\u7740\u5341\u8fdb\u5236\u6807\u7b7e\u201d\u3002<\/p>\n

    2.3 \u4e8c\u8fdb\u5236\u4e0e\u516b\u3001\u5341\u516d\u8fdb\u5236：\u6bcf 3 \u4f4d\u6216 4 \u4f4d\u4e00\u7ec4<\/h4>\n

    \u7531\u4e8e 8 = 2\u00b3\u300116 = 2\u2074，\u4ece\u53f3\u5411\u5de6\u5206\u7ec4\u5373\u53ef：<\/p>\n

    \u4e8c\u8fdb\u5236：0110 1011
    \n\u5341\u516d\u8fdb\u5236： 6 B \u2192 0x6B<\/p>\n

    \u4e8c\u8fdb\u5236：01 101 011
    \n\u516b\u8fdb\u5236： 1 5 3 \u2192 0153<\/p>\n

    \u4e24\u79cd\u5199\u6cd5\u90fd\u8868\u793a\u5341\u8fdb\u5236 107\u3002\u5de6\u4fa7\u4e0d\u8db3\u4e00\u7ec4\u65f6\u53ef\u4ee5\u8865\u524d\u5bfc 0 \u5e2e\u52a9\u5bf9\u9f50，\u5b83\u4e0d\u6539\u53d8\u6570\u503c\u3002C \u8bed\u8a00\u91cc\u7684\u6574\u6570\u5e38\u91cf 0153 \u4ee5 0 \u5f00\u5934，\u8868\u793a\u516b\u8fdb\u5236；0x6B \u4ee5 0x \u5f00\u5934，\u8868\u793a\u5341\u516d\u8fdb\u5236\u3002\u7279\u522b\u7559\u610f 08 \u4e0d\u662f\u5408\u6cd5\u7684\u516b\u8fdb\u5236\u6574\u6570\u5e38\u91cf\u3002<\/p>\n

    #<\/span>include<\/span> <stdio.h><\/span><\/span><\/p>\n

    int<\/span> main<\/span>(<\/span>void<\/span>)<\/span>
    \n{<\/span>
    \n unsigned<\/span> int<\/span> value =<\/span> 107U<\/span>;<\/span>
    \n printf<\/span>(<\/span>"\u5341\u8fdb\u5236=%u，\u516b\u8fdb\u5236=%o，\u5341\u516d\u8fdb\u5236=%X\\\\n"<\/span>,<\/span>
    \n value,<\/span> value,<\/span> value)<\/span>;<\/span>
    \n return<\/span> 0<\/span>;<\/span>
    \n}<\/span><\/p>\n

    \u8f93\u51fa\u662f \u5341\u8fdb\u5236=107，\u516b\u8fdb\u5236=153，\u5341\u516d\u8fdb\u5236=6B\u3002%o \u548c %X \u53ea\u6539\u53d8\u663e\u793a\u65b9\u5f0f，\u4e0d\u6539\u53d8 value \u4fdd\u5b58\u7684\u6570\u503c\u3002<\/p>\n

    \n

    \u4e09\u3001\u539f\u7801\u3001\u53cd\u7801\u3001\u8865\u7801：\u5206\u6e05\u6559\u5b66\u6a21\u578b\u4e0e\u8bed\u8a00\u89c4\u5219<\/h3>\n

    \u8bfe\u7a0b\u7528\u539f\u7801\u3001\u53cd\u7801\u3001\u8865\u7801\u89e3\u91ca\u6709\u7b26\u53f7\u6574\u6570\u3002\u8fd9\u4e2a\u6a21\u578b\u5f88\u9002\u5408\u5efa\u7acb\u76f4\u89c9，\u4f46\u9605\u8bfb\u4ee3\u7801\u65f6\u8981\u8bb0\u4f4f：\u672c\u7bc7\u6309\u7167 C11 \u8bb2\u89e3，\u4e0d\u80fd\u628a\u201c\u6240\u6709\u5e73\u53f0\u7684\u6709\u7b26\u53f7\u6574\u6570\u90fd\u5fc5\u7136\u662f 32 \u4f4d\u8865\u7801\u201d\u5f53\u6210\u8bed\u8a00\u4fdd\u8bc1\u3002 \u6570\u636e\u4f4d\u6570\u3001char \u662f\u5426\u5e26\u7b26\u53f7，\u4ee5\u53ca C11 \u5141\u8bb8\u7684\u6709\u7b26\u53f7\u6574\u6570\u8868\u793a\u65b9\u5f0f，\u90fd\u53ef\u80fd\u5f71\u54cd\u5177\u4f53\u4f4d\u56fe\u3002<\/p>\n

    \u4e0b\u9762\u56fa\u5b9a\u4e00\u4e2a8 \u4f4d\u8865\u7801\u6559\u5b66\u6a21\u578b，\u53ea\u8ba8\u8bba +5 \u548c -5：<\/p>\n

    +5 \u539f\u7801：0000 0101
    \n +5 \u53cd\u7801：0000 0101
    \n +5 \u8865\u7801：0000 0101<\/p>\n

    -5 \u539f\u7801：1000 0101 \u6700\u9ad8\u4f4d\u6807\u8bb0\u8d1f\u6570
    \n -5 \u53cd\u7801：1111 1010 \u7b26\u53f7\u4f4d\u4e0d\u53d8，\u5176\u4ed6\u4f4d\u53d6\u53cd
    \n -5 \u8865\u7801：1111 1011 \u53cd\u7801\u518d\u52a0 1<\/p>\n

    \u8865\u7801\u7684\u4e00\u4e2a\u597d\u5904\u662f：\u5728\u56fa\u5b9a\u5bbd\u5ea6\u4e0b，\u52a0\u6cd5\u4e0e\u51cf\u6cd5\u53ef\u4ee5\u7edf\u4e00\u5230\u4e8c\u8fdb\u5236\u52a0\u6cd5，\u5e76\u81ea\u7136\u820d\u5f03\u6700\u9ad8\u4f4d\u4ee5\u5916\u7684\u8fdb\u4f4d\u3002\u6bd4\u5982\u6309 8 \u4f4d\u6f14\u793a，5 + (-5) \u7684\u4f4e 8 \u4f4d\u4e3a 0000 0000\u3002\u8fd9\u89e3\u91ca\u4e86\u8865\u7801\u4e3a\u4f55\u5728\u5b9e\u9645\u673a\u5668\u4e2d\u5e38\u89c1\u3002<\/p>\n

    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    \u5bb9\u6613\u6df7\u6dc6\u7684\u4e09\u4ef6\u4e8b：<\/p>\n

  • \u201c\u663e\u793a\u6210\u8d1f\u6570\u201d\u662f\u6570\u503c\u89e3\u91ca；\u201c\u4f4d\u56fe\u662f\u4ec0\u4e48\u201d\u6d89\u53ca\u7c7b\u578b\u5bbd\u5ea6\u548c\u8868\u793a\u65b9\u5f0f\u3002<\/li>\n
  • \u628a\u8d1f\u7684 int \u8f6c\u6210 unsigned int，C \u8bed\u8a00\u5bf9\u7ed3\u679c\u6709\u660e\u786e\u7684\u6a21 UINT_MAX + 1 \u8f6c\u6362\u89c4\u5219；\u4e0d\u8981\u4ec5\u9760\u60f3\u8c61\u5185\u5b58\u4e2d\u67d0\u4e9b\u5b57\u8282\u505a\u63a8\u5bfc\u3002<\/li>\n
  • \u5bf9\u8d1f\u7684\u6709\u7b26\u53f7\u6570\u505a\u53f3\u79fb，\u7ed3\u679c\u7531\u5b9e\u73b0\u5b9a\u4e49；\u9700\u8981\u7a33\u5b9a\u7684\u903b\u8f91\u4f4d\u8fd0\u7b97\u65f6，\u4f18\u5148\u4f7f\u7528\u65e0\u7b26\u53f7\u7c7b\u578b\u3002<\/li>\n
    \n

    \u56db\u3001\u79fb\u4f4d\u64cd\u4f5c\u7b26：\u5148\u770b\u7c7b\u578b，\u518d\u770b\u79fb\u52a8\u4f4d\u6570<\/h3>\n

    << \u548c >> \u7684\u64cd\u4f5c\u6570\u5fc5\u987b\u662f\u6574\u6570\u7c7b\u578b\u3002\u79fb\u4f4d\u524d\u6574\u6570\u63d0\u5347\u4f1a\u53d1\u751f，\u7ed3\u679c\u7c7b\u578b\u662f\u63d0\u5347\u540e\u7684\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b\u3002\u53f3\u8fb9\u7684\u79fb\u4f4d\u4f4d\u6570\u5fc5\u987b >= 0，\u4e14\u4e25\u683c\u5c0f\u4e8e\u63d0\u5347\u540e\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b\u7684\u4f4d\u5bbd；\u5426\u5219\u884c\u4e3a\u672a\u5b9a\u4e49\u3002\u5b83\u4e0d\u662f\u201c\u81ea\u52a8\u5bf9\u4f4d\u5bbd\u53d6\u6a21\u201d\u3002<\/p>\n

    4.1 \u5de6\u79fb：\u53f3\u4fa7\u8865 0，\u4f46\u7ed3\u679c\u4ecd\u53d7\u7c7b\u578b\u89c4\u5219\u7ea6\u675f<\/h4>\n

    \u5341\u8fdb\u5236 10：0000 1010
    \n\u5de6\u79fb\u4e00\u4f4d：0001 0100 \u2192 20<\/p>\n

    unsigned<\/span> int<\/span> number =<\/span> 10U<\/span>;<\/span>
    \nunsigned<\/span> int<\/span> doubled =<\/span> number <<<\/span> 1<\/span>;<\/span><\/p>\n

    \u65e0\u7b26\u53f7\u5de6\u79fb\u76f8\u5f53\u4e8e\u4e58\u4ee5 2 \u7684\u76f8\u5e94\u5e42，\u5e76\u6309\u65e0\u7b26\u53f7\u7c7b\u578b\u7684\u6a21\u6570\u4fdd\u7559\u7ed3\u679c\u3002\u5bf9\u4e8e\u975e\u8d1f\u7684\u6709\u7b26\u53f7\u6570，\u53ea\u6709\u7ed3\u679c\u80fd\u7528\u8be5\u6709\u7b26\u53f7\u7c7b\u578b\u8868\u793a\u65f6，\u624d\u9002\u5408\u6309\u201c\u4e58\u4ee5 2\u201d\u7406\u89e3；\u8d1f\u6570\u5de6\u79fb\u3001\u65e0\u6cd5\u8868\u793a\u7684\u7ed3\u679c\u90fd\u4e0d\u5e94\u8fd9\u6837\u5199\u3002<\/p>\n

    number << 1 \u4e0d\u4f1a\u4fee\u6539 number \u672c\u8eab，\u8d4b\u503c\u7ed9 doubled \u624d\u4fdd\u5b58\u65b0\u7ed3\u679c；\u82e5\u8981\u6539\u539f\u53d8\u91cf，\u53ef\u5199 number <<= 1\u3002<\/p>\n

    4.2 \u53f3\u79fb：\u65e0\u7b26\u53f7\u6570\u5de6\u4fa7\u8865 0<\/h4>\n

    \u5341\u8fdb\u5236 10：0000 1010
    \n\u53f3\u79fb\u4e00\u4f4d：0000 0101 \u2192 5<\/p>\n

    unsigned<\/span> int<\/span> number =<\/span> 10U<\/span>;<\/span>
    \nunsigned<\/span> int<\/span> half =<\/span> number >><\/span> 1<\/span>;<\/span><\/p>\n

    \u65e0\u7b26\u53f7\u53f3\u79fb\u53ef\u7406\u89e3\u4e3a\u9664\u4ee5 2 \u7684\u76f8\u5e94\u5e42\u5e76\u5411\u4e0b\u53d6\u6574\u3002\u8d1f\u7684\u6709\u7b26\u53f7\u6570\u53f3\u79fb\u5728\u5e38\u89c1\u673a\u5668\u4e0a\u53ef\u80fd\u505a\u7b26\u53f7\u6269\u5c55，\u4f46 C11 \u5bf9\u5b83\u7684\u7ed3\u679c\u89c4\u5b9a\u4e3a\u5b9e\u73b0\u5b9a\u4e49，\u4e0d\u8981\u628a\u67d0\u53f0\u673a\u5668\u4e0a\u7684\u8f93\u51fa\u5199\u6210\u8de8\u5e73\u53f0\u7ed3\u8bba\u3002<\/p>\n

    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    4.3 \u5199\u79fb\u4f4d\u4ee3\u7801\u65f6\u5148\u8fc7\u4e09\u5173<\/h4>\n\n\u68c0\u67e5\u9879\u5b89\u5168\u601d\u8def<\/tr>\n\n\n\n\n
    \u5de6\u64cd\u4f5c\u6570\u662f\u4ec0\u4e48\u7c7b\u578b？<\/td>\n\u63a9\u7801\u548c\u4f4d\u5b57\u6bb5\u4f18\u5148\u7528 unsigned int \u6216\u660e\u786e\u5bbd\u5ea6\u7684\u65e0\u7b26\u53f7\u7c7b\u578b<\/td>\n<\/tr>\n
    \u4f4d\u6570\u662f\u5426\u5408\u6cd5？<\/td>\n0 <= shift < \u4f4d\u5bbd，\u52a8\u6001\u4f4d\u6570\u8981\u5148\u68c0\u67e5<\/td>\n<\/tr>\n
    \u7ed3\u679c\u4f1a\u4e0d\u4f1a\u4e22\u9ad8\u4f4d？<\/td>\n\u65e0\u7b26\u53f7\u4e22\u4f4d\u6709\u660e\u786e\u89c4\u5219，\u4f46\u4e1a\u52a1\u662f\u5426\u5141\u8bb8\u4ecd\u8981\u68c0\u67e5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u8bfe\u7a0b\u4e2d\u7684 num >> -1 \u6b63\u662f\u975e\u6cd5\u4f4d\u6570\u7684\u4f8b\u5b50\u3002\u53e6\u4e00\u4e2a\u5e38\u89c1\u9519\u8bef\u662f\u628a 1 << 31 \u5f53\u6210\u901a\u7528\u7684 32 \u4f4d\u6700\u9ad8\u4f4d\u63a9\u7801：1 \u662f\u6709\u7b26\u53f7 int，\u8fd9\u6837\u7684\u5199\u6cd5\u4f1a\u78b0\u5230\u6709\u7b26\u53f7\u79fb\u4f4d\u89c4\u5219；\u81f3\u5c11\u5e94\u5148\u4ece 1U \u6216\u5408\u9002\u7684\u65e0\u7b26\u53f7\u7c7b\u578b\u51fa\u53d1，\u5e76\u68c0\u67e5\u4f4d\u5bbd\u3002<\/p>\n

    \n

    \u4e94\u3001\u56db\u4e2a\u4f4d\u64cd\u4f5c\u7b26\u600e\u6837\u9010\u4f4d\u8ba1\u7b97<\/h3>\n

    \u6309\u4f4d\u8fd0\u7b97\u5904\u7406\u7684\u662f\u6574\u6570\u7684\u5bf9\u5e94\u4f4d；\u5b83\u4eec\u4e0e &&\u3001||\u3001! \u7b49\u903b\u8f91\u8fd0\u7b97\u4e0d\u662f\u4e00\u56de\u4e8b\u3002\u5148\u7528\u5355\u4e2a\u4f4d\u5efa\u7acb\u771f\u503c\u8868：<\/p>\n\naba & ba | ba ^ b<\/tr>\n\n\n\n\n\n
    0<\/td>\n0<\/td>\n0<\/td>\n0<\/td>\n0<\/td>\n<\/tr>\n
    0<\/td>\n1<\/td>\n0<\/td>\n1<\/td>\n1<\/td>\n<\/tr>\n
    1<\/td>\n0<\/td>\n0<\/td>\n1<\/td>\n1<\/td>\n<\/tr>\n
    1<\/td>\n1<\/td>\n1<\/td>\n1<\/td>\n0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      \n
    • &：\u90fd\u4e3a 1 \u624d\u4e3a 1，\u9002\u5408\u7b5b\u9009\u6307\u5b9a\u7684\u4f4d\u3002<\/li>\n
    • |：\u6709\u4e00\u4e2a\u4e3a 1 \u5c31\u4e3a 1，\u9002\u5408\u628a\u6307\u5b9a\u4f4d\u8bbe\u4e3a 1\u3002<\/li>\n
    • ^：\u4e24\u4f4d\u4e0d\u540c \u4e3a 1，\u9002\u5408\u7ffb\u8f6c\u6307\u5b9a\u4f4d\u3002<\/li>\n
    • ~：\u4e00\u5143\u8fd0\u7b97\u7b26，\u9010\u4f4d\u53d6\u53cd\u3002<\/li>\n<\/ul>\n

      1010 (10)
      \n& 1100 (12)
      \n —-
      \n 1000 (8)<\/p>\n

      1010
      \n| 1100
      \n —-
      \n 1110 (14)<\/p>\n

      1010
      \n^ 1100
      \n —-
      \n 0110 (6)<\/p>\n

      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

      \u4f7f\u7528 ~ \u65f6\u8981\u628a\u7c7b\u578b\u5bbd\u5ea6\u4e0e\u6574\u6570\u63d0\u5347\u653e\u8fdb\u8111\u4e2d\u3002\u6bd4\u5982 ~0U \u7684\u7ed3\u679c\u662f\u8be5 unsigned int \u7c7b\u578b\u6240\u6709\u503c\u4f4d\u90fd\u4e3a 1，\u5176\u503c\u4e3a UINT_MAX；~0 \u5219\u662f\u6709\u7b26\u53f7 int \u8868\u8fbe\u5f0f，\u4e0d\u80fd\u628a\u4e24\u8005\u7684\u7c7b\u578b\u548c\u8f93\u51fa\u683c\u5f0f\u6df7\u4e3a\u4e00\u8c08\u3002<\/p>\n

      5.1 \u5f02\u6216\u4ea4\u6362：\u80fd\u505a，\u4f46\u6ca1\u5fc5\u8981\u7528\u5b83\u5199\u4e1a\u52a1\u4ee3\u7801<\/h4>\n

      \u8bfe\u7a0b\u7ed9\u51fa\u201c\u4e0d\u80fd\u521b\u5efa\u7b2c\u4e09\u4e2a\u53d8\u91cf\u201d\u7684\u9762\u8bd5\u9898：<\/p>\n

      a ^=<\/span> b;<\/span>
      \nb ^=<\/span> a;<\/span>
      \na ^=<\/span> b;<\/span><\/p>\n

      \u5f53 a\u3001b \u662f\u4e24\u4e2a\u4e0d\u540c\u7684\u6574\u6570\u5bf9\u8c61\u65f6，\u8fd9\u4e2a\u6280\u5de7\u53ef\u4ee5\u4ea4\u6362\u6570\u503c\u3002\u82e5\u901a\u8fc7\u4e24\u4e2a\u5b9e\u9645\u6307\u5411\u540c\u4e00\u5bf9\u8c61\u7684\u522b\u540d\u53bb\u6267\u884c，\u4f1a\u628a\u503c\u6e05\u96f6；\u5b83\u8fd8\u4e0d\u5982\u4e34\u65f6\u53d8\u91cf\u6e05\u695a\u3002\u5b9e\u9645\u4ee3\u7801\u76f4\u63a5\u5199：<\/p>\n

      int<\/span> temporary =<\/span> a;<\/span>
      \na =<\/span> b;<\/span>
      \nb =<\/span> temporary;<\/span><\/p>\n

      \u53ef\u8bfb\u6027\u901a\u5e38\u6bd4\u7701\u6389\u4e00\u4e2a\u4e34\u65f6\u5bf9\u8c61\u66f4\u91cd\u8981\u3002<\/p>\n

      \n

      \u516d\u3001\u5b9e\u6218\u4e00：\u7edf\u8ba1\u4e8c\u8fdb\u5236\u4e2d 1 \u7684\u4e2a\u6570<\/h3>\n

      \u8bbe\u76ee\u6807\u662f\u7edf\u8ba1\u4e00\u4e2a unsigned int \u503c\u5728\u81ea\u8eab\u4f4d\u5bbd\u5185\u6709\u591a\u5c11\u4e2a 1\u3002\u8bfe\u7a0b\u4f9d\u6b21\u5c55\u793a\u4e86\u9664 2\u3001\u9010\u4f4d\u6d4b\u8bd5\u3001n & (n-1) \u4e09\u79cd\u601d\u8def；\u628a\u8f93\u5165\u660e\u786e\u6210\u65e0\u7b26\u53f7\u540e，\u5c31\u80fd\u907f\u514d\u8d1f\u6570\u9664\u6cd5\u548c\u6709\u7b26\u53f7\u79fb\u4f4d\u5e26\u6765\u7684\u6b67\u4e49\u3002<\/p>\n

      6.1 \u65b9\u6cd5\u4e00：\u4e0d\u65ad\u53d6\u6700\u4f4e\u4f4d<\/h4>\n

      unsigned<\/span> int<\/span> count_ones_by_shift<\/span>(<\/span>unsigned<\/span> int<\/span> value)<\/span>
      \n{<\/span>
      \n unsigned<\/span> int<\/span> count =<\/span> 0U<\/span>;<\/span>
      \n while<\/span> (<\/span>value !=<\/span> 0U<\/span>)<\/span>
      \n {<\/span>
      \n count +=<\/span> value &<\/span> 1U<\/span>;<\/span>
      \n value >>=<\/span> 1<\/span>;<\/span>
      \n }<\/span>
      \n return<\/span> count;<\/span>
      \n}<\/span><\/p>\n

      \u6bcf\u8f6e\u7528 value & 1U \u8bfb\u53d6\u6700\u4f4e\u4f4d，\u518d\u53f3\u79fb\u3002\u65f6\u95f4\u4e0e\u9700\u8981\u68c0\u67e5\u7684\u6709\u6548\u4f4d\u6570\u76f8\u5173，\u6700\u591a\u68c0\u67e5\u8be5\u7c7b\u578b\u7684\u4f4d\u5bbd\u3002<\/p>\n

      6.2 \u65b9\u6cd5\u4e8c：\u9010\u4f4d\u68c0\u6d4b，\u7559\u610f\u79fb\u4f4d\u7684\u7c7b\u578b<\/h4>\n

      \u4e5f\u53ef\u4ee5\u6309\u4f4d\u53f7\u5faa\u73af，\u7528 value & (1U << i) \u68c0\u6d4b\u3002\u4f46\u8981\u4fdd\u8bc1 i \u5c0f\u4e8e unsigned int \u7684\u4f4d\u5bbd\u3002\u5199\u6210\u56fa\u5b9a 32 \u6b21\u9690\u542b\u4e86\u201cunsigned int \u6b63\u597d 32 \u4f4d\u201d\u7684\u5e73\u53f0\u5047\u8bbe；\u5199\u6210 1 << i \u53c8\u4f1a\u5f15\u5165\u6709\u7b26\u53f7\u5de6\u79fb\u7684\u95ee\u9898\u3002<\/p>\n

      6.3 \u65b9\u6cd5\u4e09：\u6bcf\u8f6e\u6e05\u9664\u6700\u53f3\u8fb9\u7684\u4e00\u4e2a 1<\/h4>\n

      unsigned<\/span> int<\/span> count_ones<\/span>(<\/span>unsigned<\/span> int<\/span> value)<\/span>
      \n{<\/span>
      \n unsigned<\/span> int<\/span> count =<\/span> 0U<\/span>;<\/span>
      \n while<\/span> (<\/span>value !=<\/span> 0U<\/span>)<\/span>
      \n {<\/span>
      \n value &=<\/span> value –<\/span> 1U<\/span>;<\/span>
      \n ++<\/span>count;<\/span>
      \n }<\/span>
      \n return<\/span> count;<\/span>
      \n}<\/span><\/p>\n

      \u4e3a\u4ec0\u4e48\u6709\u6548？\u5047\u8bbe value = 0b10110000\u3002\u51cf 1 \u540e，\u6700\u53f3\u8fb9\u7684 1 \u53d8\u6210 0，\u5b83\u53f3\u8fb9\u7684 0 \u53d8\u6210 1；\u518d\u6309\u4f4d\u4e0e，\u53f3\u4fa7\u8fd9\u4e00\u6bb5\u90fd\u88ab\u6e05\u6389，\u539f\u6765\u6700\u53f3\u8fb9\u7684 1 \u4e5f\u88ab\u6e05\u6389：<\/p>\n

      value 1011 0000
      \n value – 1 1010 1111
      \n \u4e0e\u8fd0\u7b97 1010 0000<\/p>\n

      \u56e0\u6b64\u5faa\u73af\u6b21\u6570\u7b49\u4e8e 1 \u7684\u4e2a\u6570，\u800c\u975e\u603b\u4f4d\u5bbd\u3002\u8f93\u5165\u4e3a 0 \u65f6\u76f4\u63a5\u8fd4\u56de 0\u3002\u8fd9\u91cc\u6709\u610f\u4f7f\u7528 unsigned int：\u82e5\u628a\u8bfe\u7a0b\u4e2d\u7684 int num = -1; num = num & (num – 1); \u673a\u68b0\u5957\u5230\u6240\u6709\u8d1f\u6570，num – 1 \u7b49\u8fd0\u7b97\u53ef\u80fd\u89e6\u53ca\u6709\u7b26\u53f7\u6ea2\u51fa，\u4e0d\u9002\u5408\u4f5c\u4e3a\u901a\u7528\u89e3\u6cd5\u3002<\/p>\n

      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

      \u5b8c\u6574\u53ef\u8fd0\u884c\u793a\u4f8b：<\/p>\n

      #<\/span>include<\/span> <stdio.h><\/span><\/span><\/p>\n

      unsigned<\/span> int<\/span> count_ones<\/span>(<\/span>unsigned<\/span> int<\/span> value)<\/span>
      \n{<\/span>
      \n unsigned<\/span> int<\/span> count =<\/span> 0U<\/span>;<\/span>
      \n while<\/span> (<\/span>value !=<\/span> 0U<\/span>)<\/span>
      \n {<\/span>
      \n value &=<\/span> value –<\/span> 1U<\/span>;<\/span>
      \n ++<\/span>count;<\/span>
      \n }<\/span>
      \n return<\/span> count;<\/span>
      \n}<\/span><\/p>\n

      int<\/span> main<\/span>(<\/span>void<\/span>)<\/span>
      \n{<\/span>
      \n printf<\/span>(<\/span>"%u\\\\n"<\/span>,<\/span> count_ones<\/span>(<\/span>0U<\/span>)<\/span>)<\/span>;<\/span> \/* 0 *\/<\/span>
      \n printf<\/span>(<\/span>"%u\\\\n"<\/span>,<\/span> count_ones<\/span>(<\/span>13U<\/span>)<\/span>)<\/span>;<\/span> \/* 3：1101 *\/<\/span>
      \n printf<\/span>(<\/span>"%u\\\\n"<\/span>,<\/span> count_ones<\/span>(<\/span>15U<\/span>)<\/span>)<\/span>;<\/span> \/* 4：1111 *\/<\/span>
      \n return<\/span> 0<\/span>;<\/span>
      \n}<\/span><\/p>\n

      \n

      \u4e03\u3001\u5b9e\u6218\u4e8c：\u6307\u5b9a\u4e8c\u8fdb\u5236\u4f4d\u7684\u7f6e 1\u3001\u6e05 0 \u4e0e\u7ffb\u8f6c<\/h3>\n

      \u8bfe\u7a0b\u8981\u6c42\u628a\u5341\u8fdb\u5236 13 \u7684\u4ece\u53f3\u5f80\u5de6\u7b2c 5 \u4f4d\u6539\u6210 1，\u518d\u6539\u56de 0\u3002\u82e5\u4f4d\u53f7\u4ece 0 \u5f00\u59cb，\u8fd9\u5c31\u662f\u7b2c 4 \u4f4d，\u63a9\u7801\u5199\u4e3a 1U << 4：<\/p>\n

      \u539f\u503c： 0000 1101 (13)
      \n\u63a9\u7801： 0001 0000 (1U << 4)
      \n\u6309\u4f4d\u6216： 0001 1101 (29)<\/p>\n

      \u4e09\u4e2a\u5e38\u7528\u64cd\u4f5c\u53ef\u4ee5\u5408\u6210\u4e00\u5f20\u201c\u63a9\u7801\u901f\u67e5\u8868\u201d：<\/p>\n\n\u76ee\u6807\u8868\u8fbe\u5f0f\u4ee5\u7b2c 4 \u4f4d\u4e3a\u4f8b<\/tr>\n\n\n\n\n\n
      \u7f6e 1<\/td>\nvalue |= mask<\/td>\n13 \u2192 29<\/td>\n<\/tr>\n
      \u6e05 0<\/td>\nvalue &= ~mask<\/td>\n29 \u2192 13<\/td>\n<\/tr>\n
      \u7ffb\u8f6c<\/td>\nvalue ^= mask<\/td>\n13 \u2194 29<\/td>\n<\/tr>\n
      \u8bfb\u53d6<\/td>\n(value & mask) != 0U<\/td>\n13 \u7684\u7b2c 4 \u4f4d\u4e3a 0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

      #<\/span>include<\/span> <stdio.h><\/span><\/span><\/p>\n

      int<\/span> main<\/span>(<\/span>void<\/span>)<\/span>
      \n{<\/span>
      \n unsigned<\/span> int<\/span> value =<\/span> 13U<\/span>;<\/span>
      \n unsigned<\/span> int<\/span> mask =<\/span> 1U<\/span> <<<\/span> 4<\/span>;<\/span><\/p>\n

      value |=<\/span> mask;<\/span>
      \n printf<\/span>(<\/span>"\u7f6e 1：%u\\\\n"<\/span>,<\/span> value)<\/span>;<\/span> \/* 29 *\/<\/span><\/p>\n

      value &=<\/span> ~<\/span>mask;<\/span>
      \n printf<\/span>(<\/span>"\u6e05 0：%u\\\\n"<\/span>,<\/span> value)<\/span>;<\/span> \/* 13 *\/<\/span><\/p>\n

      value ^=<\/span> mask;<\/span>
      \n printf<\/span>(<\/span>"\u7ffb\u8f6c：%u\\\\n"<\/span>,<\/span> value)<\/span>;<\/span> \/* 29 *\/<\/span>
      \n return<\/span> 0<\/span>;<\/span>
      \n}<\/span><\/p>\n

      \u5982\u679c\u4f4d\u53f7\u6765\u81ea\u7528\u6237\u8f93\u5165，\u5148\u68c0\u67e5\u5b83\u5c0f\u4e8e unsigned int \u7684\u4f4d\u5bbd\u3002\u68c0\u67e5\u53ef\u4ee5\u7528 sizeof(unsigned int) * CHAR_BIT \u8ba1\u7b97\u5bf9\u8c61\u7684\u4f4d\u6570；\u66f4\u4e25\u683c\u5730\u8ba8\u8bba\u65e0\u7b26\u53f7\u503c\u4f4d\u5bbd\u65f6，\u8fd8\u9700\u8003\u8651\u7c7b\u578b\u8868\u793a\u548c\u586b\u5145\u4f4d\u3002\u5bf9\u4e8e\u672c\u6587\u7684 1U << 4，\u4f4d\u53f7\u56fa\u5b9a\u4e14\u663e\u7136\u5408\u6cd5\u3002<\/p>\n

      \n

      \u516b\u3001\u5e38\u89c1\u8bef\u533a\u4e0e\u7ec3\u4e60<\/h3>\n\n\u770b\u5230\u7684\u5199\u6cd5\u6216\u8bf4\u6cd5\u5e94\u600e\u6837\u5224\u65ad<\/tr>\n\n\n\n\n\n\n\n
      & \u548c && \u90fd\u662f\u201c\u4e0e\u201d<\/td>\n\u524d\u8005\u9010\u4f4d\u8fd0\u7b97；\u540e\u8005\u628a\u8868\u8fbe\u5f0f\u5f53\u771f\u5047\u503c\u5904\u7406，\u5e76\u53ef\u80fd\u77ed\u8def<\/td>\n<\/tr>\n
      x << 1 \u4e00\u5b9a\u7b49\u4e8e x * 2<\/td>\n\u8981\u8003\u8651\u7c7b\u578b\u3001\u8d1f\u6570\u3001\u53ef\u8868\u793a\u8303\u56f4\u4e0e\u9ad8\u4f4d\u4e22\u5931<\/td>\n<\/tr>\n
      x >> -1 \u4f1a\u201c\u5f80\u53cd\u65b9\u5411\u79fb\u52a8\u201d<\/td>\n\u8d1f\u7684\u79fb\u4f4d\u4f4d\u6570\u5bfc\u81f4\u672a\u5b9a\u4e49\u884c\u4e3a<\/td>\n<\/tr>\n
      \u8d1f int \u53f3\u79fb\u603b\u662f\u8865 1<\/td>\nC11 \u628a\u8d1f\u6570\u53f3\u79fb\u7684\u7ed3\u679c\u4ea4\u7ed9\u5b9e\u73b0\u5b9a\u4e49<\/td>\n<\/tr>\n
      \u7edf\u8ba1 1 \u65f6\u5199 1 << 31<\/td>\n1 \u662f\u6709\u7b26\u53f7 int；\u8981\u4ece\u65e0\u7b26\u53f7\u7c7b\u578b\u51fa\u53d1\u5e76\u6838\u5bf9\u4f4d\u5bbd<\/td>\n<\/tr>\n
      \u4f4d\u8fd0\u7b97\u590d\u6742\u5c31\u66f4\u9ad8\u6548<\/td>\n\u5148\u6bd4\u8f83\u7b97\u6cd5\u548c\u53ef\u8bfb\u6027，\u7f16\u8bd1\u5668\u4e5f\u4f1a\u4f18\u5316\u6e05\u695a\u7684\u5199\u6cd5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u52a8\u624b\u7ec3\u4e60：<\/p>\n

    • \u628a\u5341\u8fdb\u5236 42 \u5206\u522b\u5199\u6210\u4e8c\u3001\u516b\u3001\u5341\u516d\u8fdb\u5236，\u518d\u7528 printf \u6838\u5bf9\u3002<\/li>\n
    • \u4e0d\u8fd0\u884c\u4ee3\u7801，\u8ba1\u7b97 10U & 12U\u300110U | 12U\u300110U ^ 12U\u3002<\/li>\n
    • \u7528 unsigned int \u5199\u4e00\u4e2a\u51fd\u6570，\u68c0\u6d4b\u7ed9\u5b9a\u5408\u6cd5\u4f4d\u53f7\u4e0a\u7684\u4f4d\u662f\u5426\u4e3a 1\u3002<\/li>\n
    • \u8ddf\u8e2a count_ones(40U)：40 \u7684\u4e8c\u8fdb\u5236\u4e3a 101000，\u5faa\u73af\u6267\u884c\u51e0\u6b21？\u6bcf\u6b21 value \u53d8\u6210\u591a\u5c11？<\/li>\n

      \u53c2\u8003\u7b54\u6848：42 = (101010)\u2082 = (52)\u2088 = (2A)\u2081\u2086；\u4e09\u4e2a\u4f4d\u8fd0\u7b97\u7ed3\u679c\u4f9d\u6b21\u4e3a 8\u300114\u30016；40 \u2192 32 \u2192 0，\u6240\u4ee5\u5faa\u73af\u6267\u884c 2 \u6b21\u3002<\/p>\n

      \n

      \u603b\u7ed3<\/h3>\n

      \u8bfb\u4f4d\u8fd0\u7b97\u65f6，\u5efa\u8bae\u6309\u56fa\u5b9a\u987a\u5e8f\u601d\u8003：\u5148\u786e\u8ba4\u6574\u6570\u7c7b\u578b\u548c\u4f4d\u5bbd，\u518d\u5199\u51fa\u9700\u8981\u7684\u4e8c\u8fdb\u5236\u4f4d，\u6700\u540e\u68c0\u67e5\u79fb\u4f4d\u4f4d\u6570\u4e0e\u7ed3\u679c\u8303\u56f4\u3002\u8fd9\u6837，&\u3001|\u3001^\u3001~ \u5c31\u662f\u6e05\u695a\u7684\u9010\u4f4d\u89c4\u5219，\u63a9\u7801\u4e5f\u80fd\u81ea\u7136\u63a8\u5bfc\u51fa\u6765\u3002<\/p>\n

      \u4e0b\u7bc7\u4f1a\u7ee7\u7eed\u770b\u90a3\u4e9b\u4e0d\u76f4\u63a5\u5904\u7406\u4e8c\u8fdb\u5236\u4f4d\u3001\u5374\u5e38\u5e38\u8ba9\u8868\u8fbe\u5f0f\u53d8\u96be\u8bfb\u7684\u64cd\u4f5c\u7b26：\u9017\u53f7\u3001\u4e0b\u6807\u3001\u51fd\u6570\u8c03\u7528\u3001\u7ed3\u6784\u6210\u5458\u8bbf\u95ee，\u4ee5\u53ca\u4f18\u5148\u7ea7\u4e0e\u5b9e\u9645\u6c42\u503c\u987a\u5e8f\u7684\u533a\u522b\u3002<\/p>\n

      \u8d44\u6599：\u8bfe\u7a0b PDF\u300a\u7b2c10\u8bb2：\u64cd\u4f5c\u7b26\u8be6\u89e3\u300b；ISO C11 \u5de5\u4f5c\u8349\u6848 N1570 \u7684\u6574\u6570\u8f6c\u6362\u3001\u79fb\u4f4d\u4e0e\u6309\u4f4d\u8fd0\u7b97\u6761\u6b3e\u3002\u672c\u6587\u793a\u4f8b\u548c\u793a\u610f\u56fe\u4e3a\u91cd\u65b0\u6574\u7406\u4e0e\u7ed8\u5236\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

      🔥 \u661f\u5149\u7f16\u8bd1\u8005 \u00b7 \u4e2a\u4eba\u4e3b\u9875
      \n📚 \u5b66\u4e60\u4e13\u680f： \u300aC\/C \u6210\u957f\u7b14\u8bb0\u300b \u00b7 \u300aLinux \u5b9e\u8df5\u624b\u518c\u300b \u00b7 \u300a\u6570\u636e\u7ed3\u6784\u4e0e\u7b97\u6cd5\u300b
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