{"id":62856,"date":"2026-01-20T20:05:43","date_gmt":"2026-01-20T12:05:43","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/62856.html"},"modified":"2026-01-20T20:05:43","modified_gmt":"2026-01-20T12:05:43","slug":"linux%e5%9f%ba%e7%a1%80%ef%bc%8cc%e8%af%ad%e8%a8%80%e8%bf%9b%e9%98%b6%ef%bc%8c%e6%8c%87%e9%92%88%e7%af%87%ef%bc%88%e4%b8%ad%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/62856.html","title":{"rendered":"linux\u57fa\u7840\uff0cc\u8bed\u8a00\u8fdb\u9636\uff0c\u6307\u9488\u7bc7\uff08\u4e2d\uff09"},"content":{"rendered":"<\/p>\n<p>\u4e0a\u4e00\u7bc7\u4e2d&#xff0c;\u7b80\u5355\u8bb2\u89e3\u4e86\u6307\u9488\u7684\u57fa\u7840&#xff0c;\u8fd9\u7bc7\u4e3b\u8981&#xff0c;\u8865\u5145\u5b57\u7b26\u578b\u6570\u7ec4\u548c\u5b57\u7b26\u4e32\u4f5c\u4e3a\u51fd\u6570\u4f20\u53c2&#xff0c;\u51fd\u6570\u6307\u9488\u548c\u6307\u9488\u51fd\u6570&#xff0c;const\u6307\u9488\u3002<\/p>\n<p>\u6ce8\u610f&#xff1a;\u6307\u9488\u7528\u6765\u64cd\u4f5c\u6570\u636e&#xff0c;\u6570\u7ec4\u7528\u6765\u5b58\u50a8\u6570\u636e\u3002<\/p>\n<h3>\u5b57\u7b26\u578b\u6570\u7ec4\u548c\u5b57\u7b26\u4e32\u4f5c\u4e3a\u51fd\u6570\u4f20\u53c2<\/h3>\n<p>\u5728C\u8bed\u8a00\u4e2d&#xff0c;\u5b57\u7b26\u4e32\u672c\u8d28\u4e0a\u662f\u5b57\u7b26\u6570\u7ec4&#xff0c;\u4ee5\u7a7a\u5b57\u7b26\\\\0\u7ed3\u5c3e\u3002\u5f53\u6211\u4eec\u5c06\u5b57\u7b26\u4e32\u4f20\u9012\u7ed9\u51fd\u6570\u65f6&#xff0c;\u5b9e\u9645\u4e0a\u4f20\u9012\u7684\u662f\u6570\u7ec4\u9996\u5143\u7d20\u7684\u5730\u5740&#xff08;\u5373\u6307\u9488&#xff09;\u3002<\/p>\n<h4>\u5173\u952e\u77e5\u8bc6\u70b9<\/h4>\n<li>\n<p>\u6570\u7ec4\u9000\u5316\u4e3a\u6307\u9488&#xff1a;\u51fd\u6570\u53c2\u6570\u4e2d\u7684\u5b57\u7b26\u6570\u7ec4\u4f1a\u9000\u5316\u4e3achar*\u7c7b\u578b<\/p>\n<\/li>\n<li>\n<p>\u4e24\u79cd\u4f20\u9012\u65b9\u5f0f&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u4f20\u9012\u5b57\u7b26\u6570\u7ec4\u540d&#xff08;\u9690\u5f0f\u8f6c\u6362\u4e3a\u6307\u9488&#xff09;<\/p>\n<\/li>\n<li>\n<p>\u663e\u5f0f\u58f0\u660e\u4e3achar[]&#xff08;\u5b9e\u9645\u4ecd\u662f\u6309\u6307\u9488\u5904\u7406&#xff09;<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<p>\u5b57\u7b26\u4e32\u7684\u904d\u5386\u6a21\u677f&#xff08;\u6307\u9488\u7bc7&#xff09;<\/p>\n<p>char *p &#061; NULL;\/\/\u4ee3\u7801\u6846\u67b6<br \/>\np &#061; str;<br \/>\nwhile(*p !&#061; &#039;\\\\0&#039;)<br \/>\n{<br \/>\np&#043;&#043;;<br \/>\n}<\/p>\n<h3>\u51fd\u6570\u6307\u9488<\/h3>\n<p>\u51fd\u6570\u8fd4\u56de\u503c\u4e3a\u6307\u9488\u7684\u51fd\u6570&#xff0c;\u53c8\u8bf4\u8fd4\u56de\u6307\u9488\u7684\u51fd\u6570&#xff0c;\u672c\u8d28\u662f\u51fd\u6570\u975e\u6307\u9488.<\/p>\n<p>\u4e0d\u80fd\u8fd4\u56de\u5c40\u90e8\u53d8\u91cf\u7684\u5730\u5740<\/p>\n<p>\u51fd\u6570\u8fd4\u56de\u503c\u4f5c\u4e3a\u4e0b\u4e00\u4e2a\u8c03\u7528\u51fd\u6570\u53c2\u6570\u65f6&#xff0c;\u53ef\u4ee5\u4f7f\u7528\u6307\u9488\u51fd\u6570<\/p>\n<p>\u58f0\u660e&#xff1a;<\/p>\n<p>\u8fd4\u56de\u7c7b\u578b* \u51fd\u6570\u540d(\u53c2\u6570\u5217\u8868);<\/p>\n<p>\/\/ \u8fd4\u56de\u6574\u578b\u6307\u9488\u7684\u51fd\u6570<br \/>\nint* createIntArray(size_t size) {<br \/>\n    int *arr &#061; malloc(size * sizeof(int));<br \/>\n    for (size_t i &#061; 0; i &lt; size; i&#043;&#043;) {<br \/>\n        arr[i] &#061; (int)i;<br \/>\n    }<br \/>\n    return arr;<br \/>\n}<\/p>\n<p>\/\/ \u4f7f\u7528\u793a\u4f8b<br \/>\nint *myArray &#061; createIntArray(5);<br \/>\nNSLog(&#064;&#034;%d&#034;, myArray[2]); \/\/ \u8f93\u51fa2<br \/>\nfree(myArray); \/\/ \u8bb0\u5f97\u91ca\u653e\u5185\u5b58<\/p>\n<h3>\u6307\u9488\u51fd\u6570<\/h3>\n<p>\u51fd\u6570\u6307\u9488\u662f\u6307\u9488&#xff0c;\u6307\u5411\u51fd\u6570\u7684\u6307\u9488\u53d8\u91cf&#xff0c;\u5b58\u50a8\u51fd\u6570\u7684\u5165\u53e3\u5730\u5740&#xff0c;<\/p>\n<p>\u51fd\u6570\u540d\u5c31\u662f\u6307\u5411\u8be5\u51fd\u6570\u7684\u6307\u9488<\/p>\n<p>\u58f0\u660e&#xff1a;<\/p>\n<p>\u8fd4\u56de\u7c7b\u578b &#xff08;*\u6307\u9488\u53d8\u91cf\u540d&#xff09;(\u53c2\u6570\u7c7b\u578b1\u00a0 &#8230;&#8230;)<\/p>\n<p>\/\/ \u666e\u901a\u51fd\u6570<br \/>\nint add(int a, int b) {<br \/>\n    return a &#043; b;<br \/>\n}<\/p>\n<p>\/\/ \u51fd\u6570\u6307\u9488\u58f0\u660e<br \/>\nint (*mathFuncPtr)(int, int) &#061; add;<\/p>\n<p>\/\/ \u4f7f\u7528\u51fd\u6570\u6307\u9488\u8c03\u7528<br \/>\nint result &#061; mathFuncPtr(3, 5); \/\/ \u7ed3\u679c\u4e3a8<\/p>\n<h3>\u51fd\u6570\u6307\u9488\u548c\u6307\u9488\u51fd\u6570\u5bf9\u6bd4<\/h3>\n<h4>\u5bf9\u6bd4\u8868\u683c<\/h4>\n<table>\n<tr>\n<p>\u7279\u6027<\/p>\n<p>\u51fd\u6570\u6307\u9488<\/p>\n<p>\u6307\u9488\u51fd\u6570<\/p>\n<\/tr>\n<tbody>\n<tr>\n<td>\n<p>\u672c\u8d28<\/p>\n<\/td>\n<td>\n<p>\u6307\u9488\u53d8\u91cf<\/p>\n<\/td>\n<td>\n<p>\u51fd\u6570<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>\u5b58\u50a8\u5185\u5bb9<\/p>\n<\/td>\n<td>\n<p>\u51fd\u6570\u5165\u53e3\u5730\u5740<\/p>\n<\/td>\n<td>\n<p>\u8fd4\u56de\u6307\u9488\u503c<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>\u58f0\u660e\u65b9\u5f0f<\/p>\n<\/td>\n<td>\n<p>int (*ptr)(int, int)<\/p>\n<\/td>\n<td>\n<p>int* func(int, int)<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>\u4e3b\u8981\u7528\u9014<\/p>\n<\/td>\n<td>\n<p>\u56de\u8c03\u51fd\u6570\/\u52a8\u6001\u8c03\u7528<\/p>\n<\/td>\n<td>\n<p>\u8fd4\u56de\u52a8\u6001\u5206\u914d\u7684\u5185\u5b58<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>\u8c03\u7528\u65b9\u5f0f<\/p>\n<\/td>\n<td>\n<p>(*ptr)(args)\u6216 ptr(args)<\/p>\n<\/td>\n<td>\n<p>\u76f4\u63a5\u8c03\u7528\u51fd\u6570<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>const\u6307\u9488<\/h3>\n<p>\u6211\u4eec\u9700\u8981\u6293\u4f4f\u6838\u5fc3&#xff1a;const\u5173\u952e\u5b57\u7528\u4e8e\u9650\u5236\u6307\u9488\u7684\u201c\u53ef\u4fee\u6539\u6027\u201d\u2014\u2014\u5b83\u53ef\u4ee5\u9650\u5236\u201c\u6307\u9488\u6307\u5411\u7684\u6570\u636e\u201d&#xff0c;\u4e5f\u53ef\u4ee5\u9650\u5236\u201c\u6307\u9488\u672c\u8eab\u201d&#xff0c;\u6216\u540c\u65f6\u9650\u5236\u4e24\u8005\u3002\u7531\u4e8econst\u7684\u4f4d\u7f6e\u4e0d\u540c&#xff0c;\u542b\u4e49\u5dee\u5f02\u5f88\u5927&#xff0c;\u8fd9\u662f\u521d\u5b66\u8005\u6700\u5bb9\u6613\u6df7\u6dc6\u7684\u70b9\u3002<\/p>\n<p>\u672c\u6587\u7528\u201c\u95e8\u724c\u53f7\u201d\u7c7b\u6bd4\u6307\u9488&#xff08;\u6307\u9488&#061;\u95e8\u724c\u53f7&#xff0c;\u6307\u5411\u7684\u5730\u5740&#061;\u623f\u5b50\u4f4d\u7f6e&#xff0c;\u6307\u5411\u7684\u6570\u636e&#061;\u623f\u5b50\u91cc\u7684\u5185\u5bb9&#xff09;\u3002<\/p>\n<h4>\u6838\u5fc3\u6982\u5ff5&#xff1a;const\u6307\u9488\u7684\u4e24\u79cd\u9650\u5236\u5bf9\u8c61<\/h4>\n<p>const\u6307\u9488\u7684\u672c\u8d28\u662f\u201c\u5e26\u9650\u5236\u7684\u6307\u9488\u201d&#xff0c;\u9650\u5236\u7684\u5bf9\u8c61\u6709\u4e24\u79cd&#xff1a;<\/p>\n<li>\n<p>\u9650\u5236\u201c\u6307\u5411\u7684\u6570\u636e\u201d&#xff1a;\u6307\u9488\u6307\u5411\u7684\u5185\u5bb9\u4e0d\u53ef\u4fee\u6539&#xff08;\u4f46\u6307\u9488\u672c\u8eab\u53ef\u4ee5\u6539&#xff0c;\u5373\u53ef\u4ee5\u6362\u201c\u95e8\u724c\u53f7\u201d\u6307\u5411\u522b\u7684\u623f\u5b50&#xff09;&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u9650\u5236\u201c\u6307\u9488\u672c\u8eab\u201d&#xff1a;\u6307\u9488\u7684\u201c\u95e8\u724c\u53f7\u201d\u4e0d\u53ef\u4fee\u6539&#xff08;\u5373\u56fa\u5b9a\u6307\u5411\u67d0\u4e2a\u623f\u5b50&#xff0c;\u4f46\u623f\u5b50\u91cc\u7684\u5185\u5bb9\u53ef\u4ee5\u6539&#xff09;\u3002<\/p>\n<\/li>\n<p>\u6839\u636e\u9650\u5236\u5bf9\u8c61\u7684\u4e0d\u540c&#xff0c;const\u6307\u9488\u5206\u4e3a4\u79cd\u5e38\u89c1\u7c7b\u578b&#xff08;\u540e\u4e24\u79cd\u662f\u524d\u4e24\u79cd\u7684\u7ec4\u5408&#xff09;\u3002<\/p>\n<h4>\u603b\u7ed3\u8868\u683c&#xff08;\u4e00\u76ee\u4e86\u7136&#xff09;<\/h4>\n<table>\n<tr>\n<p>\u7c7b\u578b<\/p>\n<p>\u8bed\u6cd5\u793a\u4f8b<\/p>\n<p>\u6307\u9488\u672c\u8eab\u662f\u5426\u53ef\u6539&#xff08;\u6362\u95e8\u724c\u53f7&#xff09;<\/p>\n<p>\u6307\u5411\u7684\u6570\u636e\u662f\u5426\u53ef\u6539&#xff08;\u52a8\u5185\u5bb9&#xff09;<\/p>\n<p>\u521d\u59cb\u5316\u8981\u6c42<\/p>\n<\/tr>\n<tbody>\n<tr>\n<td>\n<p>\u6307\u5411\u5e38\u91cf\u7684\u6307\u9488<\/p>\n<\/td>\n<td>\n<p>const int* p<\/p>\n<\/td>\n<td>\n<p>\u2705 \u53ef\u6539<\/p>\n<\/td>\n<td>\n<p>\u274c \u4e0d\u53ef\u6539<\/p>\n<\/td>\n<td>\n<p>\u53ef\u4e0d\u521d\u59cb\u5316<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>&#xff08;\u540c\u4e0a&#xff09;<\/p>\n<\/p>\n<\/td>\n<td>\n<p>int const* p<\/p>\n<\/td>\n<td>\n<p>\u2705 \u53ef\u6539<\/p>\n<\/td>\n<td>\n<p>\u274c \u4e0d\u53ef\u6539<\/p>\n<\/td>\n<td>\n<p>\u53ef\u4e0d\u521d\u59cb\u5316<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>\u5e38\u91cf\u6307\u9488<\/p>\n<\/td>\n<td>\n<p>int* const p<\/p>\n<\/td>\n<td>\n<p>\u274c \u4e0d\u53ef\u6539<\/p>\n<\/td>\n<td>\n<p>\u2705 \u53ef\u6539<\/p>\n<\/td>\n<td>\n<p>\u5fc5\u987b\u521d\u59cb\u5316<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>\u6307\u5411\u5e38\u91cf\u7684\u5e38\u91cf\u6307\u9488<\/p>\n<\/td>\n<td>\n<p>const int* const p\u6216<\/p>\n<p>int const *const p;<\/p>\n<\/td>\n<td>\n<p>\u274c \u4e0d\u53ef\u6539<\/p>\n<\/td>\n<td>\n<p>\u274c 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