{"id":527,"date":"2022-12-01T14:51:17","date_gmt":"2023-08-27T04:01:12","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/%e5%9c%a8c%e4%b8%ad%e6%89%be%e5%88%b0%e6%95%b0%e7%bb%84%e7%9a%84%e9%95%bf%e5%ba%a6\/"},"modified":"2025-08-02T15:50:12","modified_gmt":"2025-08-02T07:50:12","slug":"%e5%9c%a8c%e4%b8%ad%e6%89%be%e5%88%b0%e6%95%b0%e7%bb%84%e7%9a%84%e9%95%bf%e5%ba%a6","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8c%e4%b8%ad%e6%89%be%e5%88%b0%e6%95%b0%e7%bb%84%e7%9a%84%e9%95%bf%e5%ba%a6\/","title":{"rendered":"\u5982\u4f55\u5728C++\u4e2d\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\uff1a5\u79cd\u5b9e\u7528\u65b9\u6cd5\u8be6\u89e3"},"content":{"rendered":"

\u5f15\u8a00<\/h2>\n

\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u5b66\u4e60C++\u4e2d\u53ef\u4ee5\u5bfb\u627e\u6570\u7ec4\u957f\u5ea6\u7684\u5404\u79cd\u65b9\u6cd5\u3002<\/p>\n

\u57fa\u672c\u4e0a\uff0c\u5f53\u6211\u4eec\u8bf4\u4e00\u4e2a\u6570\u7ec4\u7684\u957f\u5ea6\u65f6\uff0c\u6211\u4eec\u5b9e\u9645\u4e0a\u662f\u6307\u76f8\u5e94\u6570\u7ec4\u4e2d\u5b58\u5728\u7684\u5143\u7d20\u603b\u6570\u91cf\u3002\u4f8b\u5982\uff0c\u5bf9\u4e8e\u4e0b\u9762\u7ed9\u51fa\u7684\u6570\u7ec4\uff1a<\/p>\n

int<\/span> array1[<\/span>]<\/span> =<\/span> {<\/span> 0<\/span>,<\/span> 1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span> }<\/span><\/code><\/pre>\n
\u5728\u8fd9\u91cc\uff0c\u6570\u7ec4\u7684\u5927\u5c0f\u6216\u957f\u5ea6\u7b49\u4e8e\u5176\u4e2d\u5143\u7d20\u7684\u603b\u6570\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u603b\u6570\u662f”5″\u3002<\/p>\n
\u5728C++\u4e2d\u627e\u5230\u6570\u7ec4\u957f\u5ea6\u7684\u65b9\u6cd5<\/h2>\n
\u73b0\u5728\u8ba9\u6211\u4eec\u6765\u770b\u4e00\u4e0b\u5728C++\u4e2d\u627e\u5230\u6570\u7ec4\u957f\u5ea6\u7684\u4e0d\u540c\u65b9\u6cd5\uff0c\u5b83\u4eec\u5982\u4e0b\uff1a<\/p>\n
    \n
  1. \u9010\u4e2a\u5143\u7d20\u8ba1\u6570<\/li>\n
  2. begin()\u548cend()<\/li>\n
  3. sizeof()\u51fd\u6570<\/li>\n
  4. STL\u4e2d\u7684size()\u51fd\u6570<\/li>\n
  5. \u6307\u9488<\/li>\n<\/ol>\n
    \u73b0\u5728\uff0c\u8ba9\u6211\u4eec\u9010\u4e00\u8be6\u7ec6\u8ba8\u8bba\u6bcf\u79cd\u65b9\u6cd5\uff0c\u5e76\u914d\u4ee5\u4f8b\u5b50\u8bf4\u660e\u3002<\/p>\n
    1. \u9010\u4e2a\u5143\u7d20\u8ba1\u7b97<\/h3>\n
    \u904d\u5386\u7ed9\u5b9a\u7684\u6570\u7ec4\uff0c\u5e76\u540c\u65f6\u8ba1\u7b97\u6211\u4eec\u904d\u5386\u7684\u5143\u7d20\u603b\u6570\u53ef\u4ee5\u5f97\u5230\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u5bf9\u5417\uff1f<\/p>\n
    \u4f46\u662f\u5bf9\u4e8e\u904d\u5386\uff0c\u5982\u679c\u6211\u4eec\u4e0d\u4e8b\u5148\u77e5\u9053\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u5c31\u4e0d\u80fd\u76f4\u63a5\u4f7f\u7528for\u5faa\u73af\u3002\u8fd9\u4e2a\u95ee\u9898\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u7b80\u5355\u7684for-each\u5faa\u73af\u6765\u89e3\u51b3\u3002\u4ed4\u7ec6\u770b\u4e0b\u9762\u7684\u4ee3\u7801\u3002<\/p>\n
    #<\/span>include<\/span><iostream><\/span><\/span>#<\/span>include<\/span><array><\/span><\/span>using<\/span> namespace<\/span> std;<\/span>int<\/span> main<\/span>(<\/span>)<\/span>{<\/span>   int<\/span> c =<\/span> 0<\/span>;<\/span>   int<\/span> arr[<\/span>]<\/span>=<\/span>{<\/span>1<\/span>,<\/span>2<\/span>,<\/span>3<\/span>,<\/span>4<\/span>,<\/span>5<\/span>,<\/span>6<\/span>,<\/span>7<\/span>,<\/span>8<\/span>,<\/span>9<\/span>,<\/span>0<\/span>}<\/span>;<\/span>   cout<<<\/span>\"\u6570\u7ec4\u5185\u5bb9\u4e3a: \"<\/span>;<\/span>   for<\/span>(<\/span>auto<\/span> i:<\/span> arr)<\/span>   {<\/span>   \t\tcout<<<\/span>i<<<\/span>\" \"<\/span>;<\/span>   \t\tc++<\/span>;<\/span>   }<\/span>   cout<<<\/span>\"\\n\u7ed9\u5b9a\u6570\u7ec4\u7684\u957f\u5ea6\u4e3a: \"<\/span><<<\/span>c;<\/span>   return<\/span> 0<\/span>;<\/span>}<\/span><\/code><\/pre>\n
    \u8f93\u51fa\uff1a<\/p>\n
    \u6570\u7ec4\u5185\u5bb9\u4e3a: 1 2 3 4 5 6 7 8 9 0
    \u7ed9\u5b9a\u6570\u7ec4\u7684\u957f\u5ea6\u4e3a: 10<\/code><\/pre>\n
    \u5728\u8fd9\u91cc\uff0c\u6b63\u5982\u6211\u4eec\u6240\u8bf4\u7684\uff0c\u6211\u4eec\u4f7f\u7528\u4e00\u4e2a\u5e26\u6709\u8fed\u4ee3\u5668i\u7684for-each\u5faa\u73af\u904d\u5386\u6574\u4e2a\u6570\u7ec4arr\u3002\u540c\u65f6\u8ba1\u6570\u5668c\u88ab\u9012\u589e\u3002\u6700\u540e\uff0c\u5f53\u904d\u5386\u7ed3\u675f\u65f6\uff0cc\u4fdd\u5b58\u4e86\u7ed9\u5b9a\u6570\u7ec4\u7684\u957f\u5ea6\u3002<\/p>\n
    \u4f7f\u7528begin()\u548cend()\u65b9\u6cd5<\/h3>\n
    \u4f7f\u7528\u6807\u51c6\u5e93\u7684begin()\u548cend()\u51fd\u6570\u8ba1\u7b97\u6570\u7ec4\u957f\u5ea6<\/h3>\n
    \u6211\u4eec\u8fd8\u53ef\u4ee5\u4f7f\u7528\u6807\u51c6\u5e93\u7684begin()\u548cend()\u51fd\u6570\u6765\u8ba1\u7b97\u6570\u7ec4\u7684\u957f\u5ea6\u3002\u8fd9\u4e24\u4e2a\u51fd\u6570\u5206\u522b\u8fd4\u56de\u6307\u5411\u6570\u7ec4\u5f00\u59cb\u548c\u7ed3\u675f\u7684\u8fed\u4ee3\u5668\u3002\u4ed4\u7ec6\u89c2\u5bdf\u7ed9\u5b9a\u7684\u4ee3\u7801\u3002<\/p>\n
    #<\/span>include<\/span><iostream><\/span>    <\/span>\r\n#<\/span>include<\/span><array><\/span> <\/span>\r\nusing<\/span> namespace<\/span> std;<\/span>\r\nint<\/span> main<\/span>(<\/span>)<\/span>\r\n{<\/span>  \r\n   \/\/\u7ed9\u5b9a\u7684\u6570\u7ec4<\/span>\r\n   int<\/span> arr[<\/span>]<\/span> =<\/span> {<\/span> 11<\/span>,<\/span> 22<\/span>,<\/span> 33<\/span>,<\/span> 44<\/span> }<\/span>;<\/span>\r\n   \r\n   cout<<<\/span>\"\u6570\u7ec4\u7684\u957f\u5ea6\u662f\uff1a\"<\/span><<<\/span>end<\/span>(<\/span>arr)<\/span>-<\/span>begin<\/span>(<\/span>arr)<\/span>;<\/span> \/\/\u8ba1\u7b97\u957f\u5ea6<\/span>\r\n   \r\n   return<\/span> 0<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
    \u8f93\u51fa\uff1a<\/p>\n
    \u6570\u7ec4\u7684\u957f\u5ea6\u662f\uff1a:<\/span> 4<\/span>\r\n<\/code><\/pre>\n
    \u56e0\u6b64\uff0c\u6b63\u5982\u6211\u4eec\u6240\u770b\u5230\u7684\uff0c\u4e24\u4e2a\u51fd\u6570end()\u548cbegin()\u7684\u8fd4\u56de\u503c\u4e4b\u95f4\u7684\u5dee\u5f02\u7ed9\u51fa\u4e86\u7ed9\u5b9a\u6570\u7ec4arr\u7684\u5927\u5c0f\u6216\u957f\u5ea6\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5728\u6211\u4eec\u7684\u4f8b\u5b50\u4e2d\u662f4\u3002<\/p>\n
    \u5728C++\u4e2d\u4f7f\u7528sizeof()\u51fd\u6570\u6765\u67e5\u627e\u6570\u7ec4\u7684\u957f\u5ea6<\/h3>\n
    \u5728C++\u4e2d\uff0csizeof() \u8fd0\u7b97\u7b26\u8fd4\u56de\u4f20\u9012\u53d8\u91cf\u6216\u6570\u636e\u7684\u5927\u5c0f\uff08\u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d\uff09\u3002\u540c\u6837\u5730\uff0c\u5b83\u4e5f\u8fd4\u56de\u5b58\u50a8\u6570\u7ec4\u6240\u9700\u7684\u603b\u5b57\u8282\u6570\u3002\u56e0\u6b64\uff0c\u5982\u679c\u6211\u4eec\u5c06\u6570\u7ec4\u7684\u5927\u5c0f\u9664\u4ee5\u6bcf\u4e2a\u5143\u7d20\u5360\u7528\u7684\u5927\u5c0f\uff0c\u5c31\u53ef\u4ee5\u5f97\u5230\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u603b\u6570\u3002<\/p>\n
    \u8ba9\u6211\u4eec\u770b\u770b\u8fd9\u662f\u5982\u4f55\u8fd0\u4f5c\u7684\uff1a<\/p>\n
    #<\/span>include<\/span><iostream><\/span>    <\/span>\r\n#<\/span>include<\/span><array><\/span> <\/span>\r\nusing<\/span> namespace<\/span> std;<\/span>\r\nint<\/span> main<\/span>(<\/span>)<\/span>\r\n{<\/span>  \/\/\u7ed9\u5b9a\u7684\u6570\u7ec4<\/span>\r\n   int<\/span>  arr[<\/span>]<\/span> =<\/span> {<\/span>10<\/span> ,<\/span>20<\/span> ,<\/span>30<\/span>}<\/span>;<\/span>\r\n   \r\n   int<\/span> al =<\/span> sizeof<\/span>(<\/span>arr)<\/span>\/<\/span>sizeof<\/span>(<\/span>arr[<\/span>0<\/span>]<\/span>)<\/span>;<\/span> \/\/\u957f\u5ea6\u8ba1\u7b97<\/span>\r\n   cout <<<\/span> \"\u6570\u7ec4\u7684\u957f\u5ea6\u662f\uff1a\"<\/span> <<<\/span>al;<\/span>\r\n   \r\n   return<\/span> 0<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
    \u7ed3\u679c\uff1a<\/p>\n
    \u6570\u7ec4\u7684\u957f\u5ea6\u662f\uff1a:<\/span> 3<\/span>\r\n<\/code><\/pre>\n
    \u6b63\u5982\u6211\u4eec\u6240\u770b\u5230\u7684\uff0c\u6211\u4eec\u5f97\u5230\u4e86\u6211\u4eec\u60f3\u8981\u7684\u7ed3\u679c\u3002<\/p>\n
    \u4f7f\u7528STL\u4e2d\u7684size()\u51fd\u6570<\/h3>\n
    \u8fd9\u662f\u6587\u7ae0\u300a\u5728C++\u4e2d\u627e\u5230\u6570\u7ec4\u7684\u957f\u5ea6\u300b\u7684\u7b2c3\u90e8\u5206\uff08\u51714\u90e8\u5206\uff09\u3002<\/p>\n
    \u5185\u5bb9\u7247\u6bb5: \u6211\u4eec\u5728\u6807\u51c6\u5e93\u4e2d\u5b9a\u4e49\u4e86\u4e00\u4e2asize()\u51fd\u6570\uff0c\u5b83\u8fd4\u56de\u7ed9\u5b9a\u5bb9\u5668\uff08\u5728\u6211\u4eec\u8fd9\u91cc\u662f\u6570\u7ec4\uff09\u4e2d\u7684\u5143\u7d20\u6570\u91cf\u3002<\/p>\n
    #<\/span>include<\/span><iostream><\/span>    <\/span>\r\n#<\/span>include<\/span><array><\/span> <\/span>\r\nusing<\/span> namespace<\/span> std;<\/span>\r\nint<\/span> main<\/span>(<\/span>)<\/span>\r\n{<\/span>  \/\/\u7ed9\u5b9a\u7684\u6570\u7ec4<\/span>\r\n   array<<\/span>int<\/span>,<\/span>5<\/span>><\/span> arr{<\/span> 1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span> }<\/span>;<\/span>\r\n   \/\/\u4f7f\u7528STL\u4e2d\u7684size()\u51fd\u6570<\/span>\r\n   cout<<<\/span>\"\\n\u7ed9\u5b9a\u6570\u7ec4\u7684\u957f\u5ea6\u662f: \"<\/span><<<\/span>arr.<\/span>size<\/span>(<\/span>)<\/span>;<\/span>\r\n   return<\/span> 0<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
    \u7ed3\u679c\uff1a<\/p>\n
    \u7ed9\u5b9a\u6570\u7ec4\u7684\u957f\u5ea6\u662f:<\/span> 5<\/span>\r\n<\/code><\/pre>\n
    \u6839\u636e\u671f\u671b\uff0c\u6211\u4eec\u5f97\u5230\u4e86\u5982\u4e0a\u6240\u793a\u7684\u8f93\u51fa\u3002<\/p>\n
    5. \u5728C++\u4e2d\u4f7f\u7528\u6307\u9488\u6765\u67e5\u627e\u6570\u7ec4\u957f\u5ea6<\/h3>\n
    \u6211\u4eec\u8fd8\u53ef\u4ee5\u4f7f\u7528\u6307\u9488\u6765\u627e\u5230\u7ed9\u5b9a\u6570\u7ec4\u7684\u957f\u5ea6\u3002\u8ba9\u6211\u4eec\u770b\u770b\u5982\u4f55\u505a\u5230\u8fd9\u4e00\u70b9\u3002<\/p>\n
    #<\/span>include<\/span><iostream><\/span>    <\/span>\r\n#<\/span>include<\/span><array><\/span> <\/span>\r\nusing<\/span> namespace<\/span> std;<\/span>\r\nint<\/span> main<\/span>(<\/span>)<\/span>\r\n{<\/span>  \/\/\u7ed9\u5b9a\u7684\u6570\u7ec4<\/span>\r\n   int<\/span>  arr[<\/span>6<\/span>]<\/span> =<\/span> {<\/span>5<\/span>,<\/span>4<\/span>,<\/span>3<\/span>,<\/span>2<\/span>,<\/span>1<\/span>,<\/span>0<\/span>}<\/span>;<\/span>\r\n   \r\n   int<\/span> len =<\/span> *<\/span>(<\/span>&<\/span>arr +<\/span> 1<\/span>)<\/span> -<\/span> arr;<\/span>\r\n   \/\/*(&arr + 1)\u662f\u6570\u7ec4\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u4e4b\u540e<\/span>\r\n   \/\/\u7684\u4e0b\u4e00\u4e2a\u5185\u5b58\u4f4d\u7f6e\u7684\u5730\u5740<\/span>\r\n   \r\n   cout <<<\/span> \"\u6570\u7ec4\u7684\u957f\u5ea6\u662f: \"<\/span> <<<\/span> len;<\/span>\r\n   \r\n   return<\/span> 0<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
    \u8f93\u51fa\uff1a<\/p>\n
    \u6570\u7ec4\u7684\u957f\u5ea6\u662f:<\/span> 6<\/span>\r\n<\/code><\/pre>\n
    \u8868\u8fbe\u5f0f*(&arr+1)\u7ed9\u51fa\u7684\u662f\u6570\u7ec4\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u4e4b\u540e\u7684\u5185\u5b58\u4f4d\u7f6e\u7684\u5730\u5740\u3002\u56e0\u6b64\uff0c\u5b83\u4e0e\u6570\u7ec4\u8d77\u59cb\u4f4d\u7f6e\u6216\u57fa\u5730\u5740\uff08arr\uff09\u4e4b\u95f4\u7684\u5dee\u503c\u7ed9\u51fa\u4e86\u7ed9\u5b9a\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u603b\u6570\u3002<\/p>\n
    \u7ed3\u8bba<\/h2>\n
    \u6240\u4ee5\uff0c\u5728\u8fd9\u4e2a\u6559\u7a0b\u4e2d\uff0c\u6211\u4eec\u8ba8\u8bba\u4e86\u5728C++\u4e2d\u627e\u5230\u6570\u7ec4\u957f\u5ea6\u7684\u5404\u79cd\u65b9\u6cd5\u3002\u5c3d\u7ba1\u4e0a\u9762\u7684\u6bcf\u4e2a\u4f8b\u5b50\u90fd\u5f88\u5bb9\u6613\u64cd\u4f5c\uff0c\u4f46\u6211\u4eec\u66f4\u503e\u5411\u4e8e\u4f7f\u7528for-each\u5faa\u73af\u7684\u65b9\u6cd5\u3002\u8fd9\u4e0d\u4ec5\u56e0\u4e3a\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\uff0c\u8fd8\u56e0\u4e3a\u5b83\u5177\u5907\u8de8\u5e73\u53f0\u7684\u53ef\u9760\u6027\u3002<\/p>\n
    \u5982\u6709\u4efb\u4f55\u8fdb\u4e00\u6b65\u7684\u95ee\u9898\uff0c\u8bf7\u968f\u65f6\u5728\u4e0b\u65b9\u7559\u8a00\u3002<\/p>\n
    \u53c2\u8003\u6587\u732e<\/h2>\n
      \n
    • \u5982\u4f55\u627e\u5230\u6570\u7ec4\u7684\u957f\u5ea6\uff1f- Stack Overflow\u95ee\u9898,<\/li>\n
    • C++\u4e2d\u7684for-each\u5faa\u73af – JournalDev\u6587\u7ae0.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
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