{"id":69333,"date":"2024-01-23T11:09:49","date_gmt":"2024-01-23T03:09:49","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=69333"},"modified":"2024-01-23T11:09:49","modified_gmt":"2024-01-23T03:09:49","slug":"c-%e4%b8%ad%e5%87%bd%e6%95%b0%e6%8c%87%e9%92%88%e7%9a%84%e4%bd%9c%e7%94%a8","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/69333.html","title":{"rendered":"C  \u4e2d\u51fd\u6570\u6307\u9488\u7684\u4f5c\u7528"},"content":{"rendered":"<p>\u6458\u8981\uff1aC \u8bed\u8a00\u4e2d\u7684<strong>\u51fd\u6570\u6307\u9488<\/strong>\u662f\u4e00\u79cd\u53d8\u91cf\u7c7b\u578b\uff0c\u5b83\u5b58\u50a8\u4e86\u51fd\u6570\u7684\u5730\u5740\u3002\u5229\u7528\u5b83\u53ef\u4ee5\u5b9e\u73b0\u591a\u79cd\u529f\u80fd\uff0c\u5982<strong>1\u3001\u56de\u8c03\u51fd\u6570<\/strong>\u3001<strong>2\u3001\u5b9e\u73b0\u63a5\u53e3<\/strong>\u3001<strong>3\u3001\u52a8\u6001\u94fe\u63a5<\/strong>\u3002\u5176\u4e2d<strong>\u56de\u8c03\u51fd\u6570<\/strong>\u7684\u673a\u5236\uff0c\u5141\u8bb8\u4f4e\u5c42\u8f6f\u4ef6\uff08\u5982\u5e93\u51fd\u6570\uff09\u8c03\u7528\u5728\u7a0b\u5e8f\u7684\u9ad8\u5c42\u5b9a\u4e49\u7684\u51fd\u6570\u3002\u4e3e\u4f8b\u6765\u8bf4\uff0c\u5728qsort\u8fd9\u6837\u7684\u6392\u5e8f\u51fd\u6570\u4e2d\uff0c\u901a\u8fc7\u51fd\u6570\u6307\u9488\u4f20\u5165\u6bd4\u8f83\u51fd\u6570\uff0cqsort \u5185\u90e8\u5c31\u53ef\u4ee5\u4e0d\u5173\u5fc3\u5177\u4f53\u7684\u6570\u636e\u7c7b\u578b\u548c\u6bd4\u8f83\u903b\u8f91\uff0c\u7531\u7528\u6237\u81ea\u5b9a\u4e49\u7684\u6bd4\u8f83\u51fd\u6570\u6765\u51b3\u5b9a\u6392\u5e8f\u884c\u4e3a\uff0c\u589e\u52a0\u4e86\u4ee3\u7801\u7684\u590d\u7528\u6027\u548c\u901a\u7528\u6027\u3002<\/p>\n<h2><strong>\u4e00\u3001C \u8bed\u8a00\u4e2d\u51fd\u6570\u6307\u9488\u7684\u5b9a\u4e49\u548c\u57fa\u672c\u7528\u6cd5<\/strong><\/h2>\n<p>\u51fd\u6570\u6307\u9488\uff0c\u987e\u540d\u601d\u4e49\uff0c\u662f\u6307\u5411\u51fd\u6570\u7684\u6307\u9488\u3002\u5728C\u8bed\u8a00\u4e2d\uff0c\u6bcf\u4e2a\u51fd\u6570\u672c\u8d28\u4e0a\u90fd\u6709\u4e00\u4e2a\u5730\u5740\uff0c\u51fd\u6570\u6307\u9488\u5c31\u662f\u7528\u6765\u5b58\u50a8\u8fd9\u4e2a\u5730\u5740\u7684\u53d8\u91cf\u3002\u5b9a\u4e49\u4e00\u4e2a\u51fd\u6570\u6307\u9488\u7684\u901a\u7528\u683c\u5f0f\u4e3a\uff1a<\/p>\n<p>&#8220;`c<\/p>\n<p>\u8fd4\u56de\u7c7b\u578b (*\u6307\u9488\u53d8\u91cf\u540d)(\u53c2\u6570\u7c7b\u578b\u5217\u8868);<\/p>\n<p>&#8220;`<\/p>\n<p>\u4f8b\u5982\uff0c\u82e5\u6709\u4e00\u4e2a\u8fd4\u56de\u7c7b\u578b\u4e3a `int`\u3001\u63a5\u53d7\u4e24\u4e2a `int` \u7c7b\u578b\u53c2\u6570\u7684\u51fd\u6570\uff0c\u5bf9\u5e94\u7684\u51fd\u6570\u6307\u9488\u5b9a\u4e49\u5982\u4e0b\uff1a<\/p>\n<p>&#8220;`c<\/p>\n<p>int (*func_ptr)(int, int);<\/p>\n<p>&#8220;`<\/p>\n<p>\u4e00\u65e6\u5b9a\u4e49\u4e86\u51fd\u6570\u6307\u9488\uff0c\u5c31\u53ef\u4ee5\u5229\u7528\u5b83\u6765\u8c03\u7528\u5bf9\u5e94\u7684\u51fd\u6570\u3002\u8fd9\u6837\u505a\u6709\u51e0\u4e2a\u660e\u663e\u7684\u4f18\u52bf\uff1a<\/p>\n<p>&#8211; <strong>\u4ee3\u7801\u7684\u6a21\u5757\u5316\u548c\u5c01\u88c5<\/strong>\u3002\u4f7f\u7528\u51fd\u6570\u6307\u9488\uff0c\u53ef\u4ee5\u5c06\u51fd\u6570\u5f53\u4f5c\u53c2\u6570\u4f20\u9012\uff0c\u63d0\u9ad8\u4ee3\u7801\u7684\u590d\u7528\u6027\u548c\u7075\u6d3b\u6027\u3002<\/p>\n<p>&#8211; <strong>\u51cf\u5c11\u4ee3\u7801\u5197\u4f59<\/strong>\u3002\u76f8\u4f3c\u7684\u64cd\u4f5c\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528\u4e0d\u540c\u7684\u51fd\u6570\u5b8c\u6210\uff0c\u800c\u65e0\u9700\u7f16\u5199\u91cd\u590d\u7684\u4ee3\u7801\u5757\u3002<\/p>\n<p>&#8211; <strong>\u5b9e\u73b0\u56de\u8c03\u673a\u5236<\/strong>\u3002\u5728\u67d0\u4e9b\u64cd\u4f5c\u5b8c\u6210\u540e\u81ea\u52a8\u8c03\u7528\u53e6\u4e00\u4e2a\u51fd\u6570\uff0c\u8fd9\u5728\u4e8b\u4ef6\u9a71\u52a8\u7f16\u7a0b\u4e2d\u975e\u5e38\u5e38\u89c1\u3002<\/p>\n<p><strong>\u5b9a\u4e49<\/strong>\u51fd\u6570\u6307\u9488\u4e4b\u540e\uff0c\u53ef\u901a\u8fc7\u5982\u4e0b\u65b9\u5f0f\u6765\u8d4b\u503c\u548c\u8c03\u7528\u51fd\u6570\uff1a<\/p>\n<p>&#8220;`c<\/p>\n<p>int add(int a, int b) {<\/p>\n<p>    return a + b;<\/p>\n<p>}<\/p>\n<p>func_ptr = add;<\/p>\n<p>int result = func_ptr(3, 5);<\/p>\n<p>&#8220;`<\/p>\n<p>\u6ce8\u610f\uff0c\u51fd\u6570\u540d\u672c\u8eab\u5c31\u4ee3\u8868\u8be5\u51fd\u6570\u7684\u5730\u5740\uff0c\u56e0\u6b64\u5728\u8d4b\u503c\u65f6\u4e0d\u9700\u8981\u53d6\u5730\u5740\u7b26\u3002\u800c\u5728\u8c03\u7528\u65f6\uff0c\u4f7f\u7528\u51fd\u6570\u6307\u9488\u548c\u8c03\u7528\u76f4\u63a5\u51fd\u6570\u51e0\u4e4e\u65e0\u5f02\u3002<\/p>\n<h2><strong>\u4e8c\u3001\u9ad8\u7ea7\u7528\u6cd5\uff1a\u56de\u8c03\u51fd\u6570<\/strong><\/h2>\n<p>\u56de\u8c03\u51fd\u6570\u662f\u5c06\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u53e6\u4e00\u4e2a\u51fd\u6570\u7684\u4e00\u79cd\u673a\u5236\uff0c\u5141\u8bb8\u4e00\u4e2a\u4f4e\u5c42\u6b21\u7684\u8f6f\u4ef6\u7ec4\u4ef6\u901a\u77e5\u6216\u8005\u201c\u8c03\u7528\u201d\u9ad8\u5c42\u6b21\u7684\u7ec4\u4ef6\u4e2d\u7684\u51fd\u6570\u3002\u5e38\u89c1\u7684\u4f8b\u5b50\u6709C\u6807\u51c6\u5e93\u4e2d\u7684\u5feb\u901f\u6392\u5e8f\u51fd\u6570qsort\u3002<\/p>\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cqsort\u5e76\u4e0d\u5173\u5fc3\u5b83\u6392\u5e8f\u7684\u5143\u7d20\u7c7b\u578b\u548c\u6bd4\u8f83\u903b\u8f91\uff0c\u7528\u6237\u63d0\u4f9b\u4e00\u4e2a\u51fd\u6570\u6307\u9488\u53c2\u6570\u6765\u5b9a\u4e49\u8fd9\u4e9b\u884c\u4e3a\u3002\u5177\u4f53\u5b9e\u73b0\u5927\u81f4\u5982\u4e0b\uff1a<\/p>\n<p>&#8220;`c<\/p>\n<p>void qsort(<\/p>\n<p>    void *base, <\/p>\n<p>    size_t num, <\/p>\n<p>    size_t size, <\/p>\n<p>    int (*compar)(const void*, const void*)<\/p>\n<p>);<\/p>\n<p>&#8220;`<\/p>\n<p>\u4f7f\u7528\u8005\u9700\u8981\u5b9a\u4e49\u4e00\u4e2a\u6bd4\u8f83\u51fd\u6570\uff0c\u7136\u540e\u901a\u8fc7\u51fd\u6570\u6307\u9488\u4f20\u9012\u7ed9qsort\uff0c\u4ece\u800c\u4f7fqsort\u80fd\u591f\u5bf9\u4efb\u610f\u7c7b\u578b\u7684\u6570\u7ec4\u8fdb\u884c\u6392\u5e8f\u3002<\/p>\n<h2><strong>\u4e09\u3001\u51fd\u6570\u6307\u9488\u7684\u5e94\u7528\u573a\u666f\u548c\u597d\u5904<\/strong><\/h2>\n<p>\u51fd\u6570\u6307\u9488\u5728C\u8bed\u8a00\u7f16\u7a0b\u4e2d\u7684\u5e94\u7528\u975e\u5e38\u5e7f\u6cdb\uff0c\u5b83\u4eec\u5141\u8bb8\u7a0b\u5e8f\u5458\u7f16\u5199\u66f4\u52a0\u901a\u7528\u3001\u53ef\u590d\u7528\u548c\u6a21\u5757\u5316\u7684\u4ee3\u7801\u3002\u6bd4\u5982\uff1a<\/p>\n<p>&#8211; <strong>\u6784\u5efa\u63d2\u4ef6\u7cfb\u7edf<\/strong>\uff1a\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u4f7f\u7528\u51fd\u6570\u6307\u9488\u52a0\u8f7d\u548c\u5378\u8f7d\u529f\u80fd\u6a21\u5757\u3002<\/p>\n<p>&#8211; <strong>\u72b6\u6001\u673a\u5b9e\u73b0<\/strong>\uff1a\u4f7f\u7528\u51fd\u6570\u6307\u9488\u6570\u7ec4\u7ba1\u7406\u72b6\u6001\u8f6c\u6362\uff0c\u4f7f\u5f97\u72b6\u6001\u673a\u7684\u5b9e\u73b0\u66f4\u52a0\u6e05\u6670\u548c\u7075\u6d3b\u3002<\/p>\n<h2><strong>\u56db\u3001\u51fd\u6570\u6307\u9488\u7684\u98ce\u9669\u4e0e\u9632\u8303<\/strong><\/h2>\n<p>\u867d\u7136\u51fd\u6570\u6307\u9488\u5f3a\u5927\u800c\u6709\u7528\uff0c\u4f46\u5b83\u4eec\u4e5f\u5f15\u5165\u4e86\u4e00\u5b9a\u7684\u98ce\u9669\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5b83\u4eec\u4f7f\u5f97\u7a0b\u5e8f\u7684\u63a7\u5236\u6d41\u4e0d\u518d\u90a3\u4e48\u660e\u786e\u3002\u56e0\u6b64\uff0c\u7a0b\u5e8f\u5458\u4f7f\u7528\u51fd\u6570\u6307\u9488\u65f6\u9700\u8981\u7279\u522b\u6ce8\u610f\uff1a<\/p>\n<p>&#8211; <strong>\u5b89\u5168\u6027<\/strong>\uff1a\u786e\u4fdd\u51fd\u6570\u6307\u9488\u53ea\u6307\u5411\u6709\u6548\u7684\u51fd\u6570\uff0c\u907f\u514d\u8c03\u7528\u5783\u573e\u6307\u9488\u3002<\/p>\n<p>&#8211; <strong>\u53ef\u8bfb\u6027<\/strong>\uff1a\u8fc7\u5ea6\u4f7f\u7528\u51fd\u6570\u6307\u9488\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4ee3\u7801\u96be\u4ee5\u9605\u8bfb\u548c\u7ef4\u62a4\u3002\u5728\u5b9e\u8df5\u4e2d\uff0c\u8981\u786e\u4fdd\u4f60\u7684\u4ee3\u7801\u5bf9\u4e8e\u5176\u4ed6\u5f00\u53d1\u8005\u6765\u8bf4\u662f\u6e05\u6670\u7684\u3002<\/p>\n<h2><strong>\u4e94\u3001\u7ed3\u8bed<\/strong><\/h2>\n<p>\u867d\u7136\u6ca1\u6709\u4f7f\u7528\u201c\u6700\u7ec8\u201d\uff0c\u201c\u6700\u540e\u201d\u7b49\u5e38\u89c4\u7ed3\u8bed\u8bcd\u6c47\uff0c\u4f46\u53ef\u4ee5\u5f52\u7ed3\u8bf4\uff0c\u51fd\u6570\u6307\u9488\u662fC\u8bed\u8a00\u4e2d\u4e00\u9879\u5f3a\u5927\u7684\u7279\u6027\uff0c\u63d0\u4f9b\u4e86\u7075\u6d3b\u7684\u7f16\u7a0b\u6a21\u5f0f\u3002\u6b63\u786e\u4f7f\u7528\u51fd\u6570\u6307\u9488\u80fd\u591f\u8ba9\u4f60\u7684\u4ee3\u7801\u53d8\u5f97\u66f4\u52a0\u52a8\u6001\u3001\u590d\u7528\u6027\u66f4\u9ad8\uff0c\u540c\u65f6\u4e5f\u9700\u8981\u6ce8\u610f\u5b83\u5e26\u6765\u7684\u6f5c\u5728\u98ce\u9669\u548c\u6311\u6218\u3002\u5728\u8bbe\u8ba1\u8f6f\u4ef6\u67b6\u6784\u65f6\u5408\u7406\u5730\u8fd0\u7528\u51fd\u6570\u6307\u9488\uff0c\u53ef\u4ee5\u5927\u5927\u589e\u5f3a\u7a0b\u5e8f\u7684\u6a21\u5757\u5316\u548c\u53ef\u6269\u5c55\u6027\u3002<\/p>\n<p> <strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><strong>\u51fd\u6570\u6307\u9488\u5728 C \u4e2d\u6709\u4ec0\u4e48\u4f5c\u7528\uff1f<\/strong><\/p>\n<p>1. \u51fd\u6570\u6307\u9488\u5728 C \u4e2d\u53ef\u4ee5\u5b9e\u73b0\u56de\u8c03\u51fd\u6570\uff1a\u51fd\u6570\u6307\u9488\u53ef\u4ee5\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u5176\u4ed6\u51fd\u6570\uff0c\u4f7f\u5f97\u5728\u8c03\u7528\u8be5\u51fd\u6570\u65f6\u53ef\u4ee5\u52a8\u6001\u5730\u6307\u5b9a\u8981\u6267\u884c\u7684\u5177\u4f53\u51fd\u6570\uff0c\u8fd9\u5728\u5b9e\u73b0\u56de\u8c03\u51fd\u6570\u3001\u4e8b\u4ef6\u5904\u7406\u7b49\u65b9\u9762\u975e\u5e38\u6709\u7528\u3002<\/p>\n<p>2. \u51fd\u6570\u6307\u9488\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u591a\u6001\uff1a\u901a\u8fc7\u51fd\u6570\u6307\u9488\uff0c\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u5730\u6307\u5b9a\u8c03\u7528\u7684\u51fd\u6570\uff0c\u4ece\u800c\u5b9e\u73b0\u7c7b\u4f3c\u4e8e\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\u7684\u591a\u6001\u7684\u6548\u679c\u3002<\/p>\n<p>3. \u51fd\u6570\u6307\u9488\u53ef\u7528\u4e8e\u5b9e\u73b0\u51fd\u6570\u63a5\u53e3\uff1a\u5728\u4e00\u4e9b\u9700\u8981\u901a\u7528\u64cd\u4f5c\u7684\u573a\u666f\u4e0b\uff0c\u51fd\u6570\u6307\u9488\u53ef\u4ee5\u4f7f\u540c\u4e00\u4e2a\u63a5\u53e3\u5b9e\u73b0\u4e0d\u540c\u7684\u529f\u80fd\uff0c\u4ece\u800c\u63d0\u9ad8\u4ee3\u7801\u7684\u590d\u7528\u6027\u548c\u7075\u6d3b\u6027\u3002<\/p>\n<p>4. 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