{"id":69350,"date":"2026-01-31T14:05:22","date_gmt":"2026-01-31T06:05:22","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/69350.html"},"modified":"2026-01-31T14:05:22","modified_gmt":"2026-01-31T06:05:22","slug":"c%e8%af%ad%e8%a8%80%e5%ad%a6%e4%b9%a0%e4%b9%8b%e6%97%85%e4%ba%8c-%e6%8c%87%e9%92%88","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/69350.html","title":{"rendered":"C\u8bed\u8a00\u5b66\u4e60\u4e4b\u65c5(\u4e8c)\u2014\u2014\u2014\u2014\u2014\u2014\u6307\u9488"},"content":{"rendered":"

1.\u6307\u9488\u7684\u57fa\u672c\u6982\u5ff5<\/p>\n

\u00b7\u6307\u9488\u7684\u5185\u5bb9\u662fC\u8bed\u8a00\u8bed\u6cd5\u7684\u4e3b\u8981\u5185\u5bb9，\u4e5f\u662fC\u8bed\u8a00\u7684\u96be\u70b9\u3002<\/p>\n

\u00b7\u8ba1\u7b97\u673a\u4e0aCPU（\u4e2d\u592e\u5904\u7406\u5668）\u5728\u5904\u7406\u6570\u636e\u7684\u65f6\u5019，\u9700\u8981\u7684\u6570\u636e\u662f\u5728\u5185\u5b58\u4e2d\u8bfb\u53d6\u7684，\u5904\u7406\u540e\u7684 <\/span><\/p>\n

\u6570\u636e\u4e5f\u4f1a\u653e\u56de\u5185\u5b58\u4e2d\u3002<\/span>
\n \u90a3\u6211\u4eec\u4e70\u7535\u8111\u7684\u65f6\u5019，\u7535\u8111\u4e0a\u5185\u5b58\u662f 8GB\/16GB\/32GB \u7b49，\u90a3\u8fd9\u4e9b\u5185\u5b58\u7a7a\u95f4\u5982<\/span>
\n \u4f55\u9ad8\u6548\u7684\u7ba1\u7406\u5462？<\/span><\/p>\n

\u00b7\u5176\u5b9e\u4e5f\u662f\u628a\u5185\u5b58\u5212\u5206\u4e3a\u2f00\u4e2a\u4e2a\u7684\u5185\u5b58\u5355\u5143，\u6bcf\u4e2a\u5185\u5b58\u5355\u5143\u7684\u5927\u5c0f\u53d61\u4e2a\u5b57\u8282\u3002<\/span><\/p>\n

\u00b7\u8ba1\u7b97\u673a\u4e2d\u5e38\u7528\u7684\u5355\u4f4d：<\/span><\/p>\n

1 bit\u00a0 \u00a0(\u6bd4\u7279\u4f4d)<\/span><\/p>\n

2 byte (\u5b57\u8282)==8bit<\/span><\/p>\n

3 KB==1024byte<\/span><\/p>\n

3 MB==1024KB<\/span><\/p>\n

4 GB==1024MB<\/span><\/p>\n

5 TB==1024GB<\/p>\n

\u00b7\u540c\u65f6\u6bcf\u4e2a\u5185\u5b58\u5355\u5143\u4e5f\u90fd\u6709\u2f00\u4e2a\u7f16\u53f7，\u6709\u4e86\u8fd9\u4e2a\u5185\u5b58\u5355\u5143\u7684\u7f16\u53f7，CPU\u5c31\u53ef\u4ee5\u5feb\u901f\u627e\u5230\u2f00\u4e2a\u5185\u5b58\u7a7a\u95f4\u3002\u5728C\u8bed\u8a00\u4e2d\u8fd9\u6837\u7684\u7f16\u53f7\u79f0\u4e3a\u5730\u5740，\u4e5f\u79f0\u4e3a\u6307\u9488\u3002<\/span><\/p>\n

\u00b7\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u7406\u89e3：<\/span><\/p>\n

\u5185\u5b58\u5355\u5143\u7684\u7f16\u53f7==\u5730\u5740==\u6307\u9488<\/p>\n

2.\u6307\u9488\u53d8\u91cf<\/p>\n

\u00b7\u7406\u89e3\u4e86\u5185\u5b58\u548c\u5730\u5740\u7684\u5173\u7cfb，\u6211\u4eec\u518d\u56de\u5230C\u8bed\u8a00，\u5728C\u8bed\u8a00\u4e2d\u521b\u5efa\u53d8\u91cf\u548c\u51fd\u6570\u8c03\u7528\u5176\u5b9e\u5c31\u662f\u5411\u5185\u5b58\u7533\u8bf7\u7a7a\u95f4\u3002\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u53d6\u5730\u5740\u64cd\u4f5c\u7b26(&),\u5c06\u5730\u5740\u5b58\u653e\u5728\u6307\u9488\u53d8\u91cf\u4e2d，\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u89e3\u5f15\u7528\u64cd\u4f5c\u7b26(*)\u5c06\u6307\u9488\u53d8\u91cf\u4e2d\u5b58\u653e\u7684\u5185\u5bb9\u8fdb\u884c\u4fee\u6539\u3002<\/span><\/p>\n

#include<stdio.h>
\nint main()
\n{
\nint num = 100;
\nint* p = &num;
\n*p = 0;
\nprintf("%d", num);
\nreturn 0;
\n} <\/p>\n

\u00b7\u8f93\u51fa\u4e3a0\u3002<\/p>\n

\u00b7\u6bd4\u8f83\u7279\u6b8a\u7684\u662f\u6307\u9488\u53d8\u91cf\u7684\u5927\u5c0f\u548c\u7c7b\u578b\u65e0\u5173，\u53ea\u8981\u662f\u6307\u9488\u53d8\u91cf，\u5728\u540c\u2f00\u4e2a\u5e73\u53f0\u4e0b，\u5927\u5c0f\u90fd\u662f\u2f00\u6837\u7684\u3002\u4f46\u6307\u9488\u53d8\u91cf\u7684\u6307\u9488\u7684\u7c7b\u578b\u51b3\u5b9a\u4e86，\u5bf9\u6307\u9488\u89e3\u5f15\u2f64\u7684\u65f6\u5019\u6709\u591a\u2f24\u7684\u6743\u9650（\u2f00\u6b21\u80fd\u64cd\u4f5c\u2f0f\u4e2a\u5b57\u8282）\u3002\u6bd4\u5982： char* <\/span>\u7684\u6307\u9488\u89e3\u5f15\u7528\u5c31\u53ea\u80fd\u8bbf\u95ee\u2f00\u4e2a\u5b57\u8282，\u800c\u00a0<\/span>int* <\/span>\u7684\u6307\u9488\u7684\u89e3\u5f15\u7528\u5c31\u80fd\u8bbf\u95ee\u56db\u4e2a\u5b57\u8282\u3002<\/span><\/p>\n

3.\u6307\u9488\u7684\u8fd0\u7b97<\/span><\/p>\n

\u00b7\u6307\u9488+-\u6574\u6570==\u5730\u5740+-\u6574\u6570==\u5730\u5740<\/span><\/p>\n

\u00b7\u6307\u9488+-\u6307\u9488==\u5730\u5740+-\u5730\u5740==\u6574\u6570<\/span><\/p>\n

\u00b7\u8fd9\u90e8\u5206\u7684\u5185\u5bb9\u6bd4\u8f83\u597d\u7406\u89e3，\u4e0d\u5fc5\u8fdb\u884c\u8fc7\u591a\u9610\u8ff0\u3002<\/p>\n

4.const\u4fee\u9970\u6307\u9488<\/p>\n

\u00b7\u8fd9\u91cc\u4ee5int*\u7c7b\u578b\u6307\u9488\u4e3a\u4f8b，<\/p>\n

const int* p \/\/\u8868\u793a\u6307\u9488\u6240\u6307\u5411\u7684\u5185\u5bb9\u4e0d\u88ab\u4fee\u6539，\u6307\u5411\u5bf9\u8c61\u53ef\u4ee5\u88ab\u4fee\u6539(\u6700\u5e38\u7528，\u4fdd\u62a4\u6570\u636e)<\/span><\/p>\n

int* const p \/\/\u8868\u793a\u6307\u9488\u6240\u6307\u5411\u7684\u5185\u5bb9\u53ef\u4ee5\u88ab\u4fee\u6539，\u6307\u5411\u5bf9\u8c61\u4e0d\u53ef\u4ee5\u88ab\u4fee\u6539(\u56fa\u5b9a\u6307\u9488\u6307\u5411)<\/span><\/p>\n

const int* const p\/\/\u8868\u793a\u6307\u9488\u6240\u6307\u5411\u7684\u5185\u5bb9\u4e0d\u53ef\u4ee5\u88ab\u4fee\u6539，\u6307\u5411\u5bf9\u8c61\u4e0d\u53ef\u4ee5\u88ab\u4fee\u6539(\u53cc\u91cd\u4fdd\u62a4)<\/span><\/p>\n

5.\u4f20\u503c\u8c03\u7528\u548c\u4f20\u5740\u8c03\u7528<\/span><\/p>\n

\u00b7\u5b66\u4e60\u6307\u9488\u7684\u76ee\u7684\u662f\u4f7f\u7528\u6307\u9488\u89e3\u51b3\u95ee\u9898，\u90a3\u4ec0\u4e48\u95ee\u9898，\u975e\u6307\u9488\u4e0d\u53ef\u5462？<\/span><\/p>\n

\u00b7\u4f8b\u5982：\u5199\u2f00\u4e2a\u51fd\u6570，\u4ea4\u6362\u4e24\u4e2a\u6574\u578b\u53d8\u91cf\u7684\u503c\u3002<\/span><\/p>\n

void swap(int x,int y)
\n{
\n int temp=x;
\n x=y;
\n y=temp;
\n}<\/p>\n

\u00b7\u4f46\u5f53\u6211\u4eec\u8c03\u7528\u51fd\u6570\u65f6\u5374\u53d1\u73b0\u5e76\u6ca1\u6709\u53d1\u751f\u4ea4\u6362\u3002<\/p>\n

\u00b7swap\u51fd\u6570\u5728\u4f7f\u7528\u7684\u65f6\u5019，\u662f\u628a\u53d8\u91cf\u672c\u58f0\u76f4\u63a5\u4f20\u9012\u7ed9\u4e86\u51fd\u6570，\u8fd9\u79cd\u8c03\u7528\u53eb\u4f20\u503c\u8c03\u7528\u3002\u5b9e\u53c2\u4f20\u9012\u7ed9\u5f62\u53c2\u7684\u65f6\u5019，\u5f62\u53c2\u4f1a\u5355\u72ec\u521b\u5efa\u2f00\u4efd\u4e34\u65f6\u7a7a\u95f4\u6765\u63a5\u6536\u5b9e\u53c2，\u5bf9\u5f62\u53c2\u7684\u4fee\u6539\u4e0d\u5f71\u54cd\u5b9e\u53c2\u3002\u56e0\u6b64\u65e0\u6cd5\u5b9e\u73b0\u4ea4\u6362\u3002<\/span><\/p>\n

\u00b7\u5c06\u5b9e\u53c2\u7684\u5730\u5740\u4f20\u7ed9\u51fd\u6570，\u51fd\u6570\u901a\u8fc7\u5bf9\u5b9e\u53c2\u5730\u5740\u7684\u95f4\u63a5\u64cd\u4f5c\u5c31\u53ef\u4ee5\u5b9e\u73b0\u4ea4\u6362\u3002<\/span><\/p>\n

void swap(int* x,int* y)
\n{
\n int temp=(*x);
\n (*x)=(*y);
\n (*y)=temp;
\n} <\/p>\n

6.assert\u65ad\u8a00<\/p>\n

\u00b7assert \u65ad\u8a00\u662f C \u8bed\u8a00\u91cc\u4e00\u4e2a\u7528\u4e8e\u8c03\u8bd5\u9636\u6bb5\u68c0\u67e5\u7a0b\u5e8f\u5047\u8bbe\u6761\u4ef6\u662f\u5426\u6210\u7acb\u7684\u5b8f，\u6838\u5fc3\u4f5c\u7528\u662f\u5728\u5f00\u53d1\u65f6\u5feb\u901f\u53d1\u73b0\u4ee3\u7801\u4e2d\u7684\u903b\u8f91\u9519\u8bef，\u907f\u514d\u95ee\u9898\u5e26\u5230\u751f\u4ea7\u73af\u5883\u3002<\/p>\n

assert(\u8868\u8fbe\u5f0f)；<\/p>\n

\u00b7\u5982\u679c\u8868\u8fbe\u5f0f\u4e3a\u771f，\u7a0b\u5e8f\u7ee7\u7eed\u6267\u884c；\u5982\u679c\u4e3a\u5047，\u4f1a\u7acb\u523b\u7ec8\u6b62\u7a0b\u5e8f，\u5e76\u5728\u63a7\u5236\u53f0\u8f93\u51fa\u9519\u8bef\u4f4d\u7f6e（\u6587\u4ef6\u540d\u3001\u884c\u53f7\u3001\u8868\u8fbe\u5f0f\u5185\u5bb9），\u65b9\u4fbf\u5b9a\u4f4d\u95ee\u9898\u3002<\/p>\n

7.\u6570\u7ec4\u540d\u7684\u7406\u89e3\u548c\u6307\u9488\u8bbf\u95ee\u6570\u7ec4<\/p>\n

\u00b7\u6570\u7ec4\u540d\u7684\u672c\u8d28\u662f\u6570\u7ec4\u9996\u5143\u7d20\u7684\u5730\u5740\u5e38\u91cf，\u8fd9\u662f\u7406\u89e3\u6570\u7ec4\u540d\u7684\u6838\u5fc3，\u5176\u6240\u6709\u7279\u6027\u548c\u4f7f\u7528\u89c4\u5219\u5747\u6e90\u4e8e\u6b64\u3002<\/p>\n

\u00b7\u6570\u7ec4\u540d\u662f\u6307\u5411\u6570\u7ec4\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u5730\u5740\u5e38\u91cf\u2014\u2014 \u5b83\u5b58\u50a8\u7684\u662f\u6570\u7ec4\u9996\u5143\u7d20\u7684\u5185\u5b58\u5730\u5740，\u4e14\u503c\u4e0d\u53ef\u4fee\u6539（\u4e0d\u80fd\u505a\u81ea\u589e++\u3001\u81ea\u51cf–\u3001\u8d4b\u503c=\u7b49\u64cd\u4f5c，\u8fd9\u662f\u548c\u666e\u901a\u6307\u9488\u7684\u5173\u952e\u533a\u522b）\u3002<\/p>\n

\u00b7\u591a\u6570\u60c5\u51b5\u4e0b\u6570\u7ec4\u540d\u7b49\u4ef7\u4e8e\u9996\u5143\u7d20\u5730\u5740，\u4f46\u5728sizeof\u548c&\u53d6\u5730\u5740\u64cd\u4f5c\u7b262\u79cd\u7279\u6b8a\u60c5\u51b5\u4e0b，\u6570\u7ec4\u540d\u4f1a\u8868\u793a\u6574\u4e2a\u6570\u7ec4，\u800c\u975e\u5355\u4e2a\u5143\u7d20\u7684\u5730\u5740\u3002<\/p>\n

\u00b7\u9664\u4e0a\u8ff0 2 \u4e2a\u4f8b\u5916，\u6240\u6709\u4f7f\u7528\u6570\u7ec4\u540d\u7684\u573a\u666f，\u7f16\u8bd1\u5668\u90fd\u4f1a\u81ea\u52a8\u5c06\u6570\u7ec4\u540d\u9690\u5f0f\u8f6c\u6362\u4e3a \u201c\u9996\u5143\u7d20\u7684\u5730\u5740\u6307\u9488\u201d，\u8fd9\u4e5f\u662f\u6570\u7ec4\u80fd\u901a\u8fc7\u6307\u9488\u65b9\u5f0f\u8bbf\u95ee\u7684\u539f\u56e0\u3002<\/p>\n

\u00b7\u6307\u9488\u8bbf\u95ee\u6570\u7ec4\u662f C \u8bed\u8a00\u7684\u6838\u5fc3\u7279\u6027，\u5e95\u5c42\u672c\u8d28\u662f\u5229\u7528\u6570\u7ec4\u540d\u7684\u9690\u5f0f\u8f6c\u6362（\u9996\u5143\u7d20\u5730\u5740）+ \u6307\u9488\u504f\u79fb + \u89e3\u5f15\u7528，\u548c\u6570\u7ec4\u4e0b\u6807\u6cd5arr[i]\u5b8c\u5168\u7b49\u4ef7，\u7f16\u8bd1\u5668\u6700\u7ec8\u4f1a\u5c06\u4e24\u79cd\u5199\u6cd5\u7f16\u8bd1\u4e3a\u76f8\u540c\u7684\u673a\u5668\u7801\u3002<\/p>\n

\u00b7\u6307\u9488\u8bbf\u95ee\u6570\u7ec4\u7684\u6838\u5fc3\u516c\u5f0f:<\/p>\n

arr[i]==*(arr+i)<\/p>\n

8.\u4e00\u7ef4\u6570\u7ec4\u4f20\u53c2\u7684\u672c\u8d28\u548c\u4e8c\u7ea7\u6307\u9488<\/p>\n

\u00b7\u6709\u4e86\u524d\u9762\u5bf9\u6570\u7ec4\u540d\u7684\u7406\u89e3，\u4e0d\u96be\u53d1\u73b0，C \u8bed\u8a00\u4e2d\u4e00\u7ef4\u6570\u7ec4\u4f20\u53c2\u7684\u672c\u8d28\u662f\u4f20\u9012\u6570\u7ec4\u9996\u5143\u7d20\u7684\u5730\u5740（\u5373\u4f20\u9012\u4e00\u4e2a\u6307\u5411\u6570\u7ec4\u5143\u7d20\u7c7b\u578b\u7684\u6307\u9488），\u6570\u7ec4\u672c\u8eab\u5e76\u4e0d\u4f1a\u88ab\u6574\u4f53\u62f7\u8d1d\u4f20\u9012\u3002<\/p>\n

\u00b7\u4e8c\u7ea7\u6307\u9488\u7684\u672c\u8d28\u662f\u5b58\u50a8\u300c\u4e00\u7ea7\u6307\u9488\u53d8\u91cf\u5185\u5b58\u5730\u5740\u300d\u7684\u6307\u9488，\u7b80\u5355\u8bf4\u5c31\u662f \u201c\u6307\u9488\u7684\u6307\u9488\u201d，\u5176\u6838\u5fc3\u4f5c\u7528\u662f\u95f4\u63a5\u64cd\u4f5c\u4e00\u7ea7\u6307\u9488\u672c\u8eab（\u5982\u4fee\u6539\u4e00\u7ea7\u6307\u9488\u7684\u6307\u5411\u3001\u4e3a\u4e00\u7ea7\u6307\u9488\u52a8\u6001\u5206\u914d\u5185\u5b58），\u662f\u89e3\u51b3\u51fd\u6570\u5185\u4fee\u6539\u5916\u90e8\u6307\u9488\u3001\u5904\u7406\u6307\u9488\u6570\u7ec4\u7684\u5173\u952e\u8bed\u6cd5\u3002<\/p>\n

#include<stdio.h>
\nint main()
\n{
\nint num = 0;
\nint* p = &num;
\nint** pp = &num;
\nreturn 0;
\n} <\/p>\n

9.\u6307\u9488\u6570\u7ec4<\/p>\n

\u00b7\u6307\u9488\u6570\u7ec4\u662f\u5b58\u50a8\u4e00\u7ea7\u6307\u9488\u7684\u6570\u7ec4，\u6570\u7ec4\u7684\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u540c\u7c7b\u578b\u7684\u6307\u9488\u53d8\u91cf，\u6838\u5fc3\u4f5c\u7528\u662f\u6279\u91cf\u7ba1\u7406\u591a\u4e2a\u6307\u9488（\u5982\u591a\u4e2a\u5b57\u7b26\u4e32\u3001\u591a\u4e2a\u7ed3\u6784\u4f53\u5730\u5740），\u662f\u5904\u7406\u591a\u6307\u9488\u573a\u666f\u7684\u9ad8\u6548\u65b9\u5f0f\u3002<\/p>\n

\u00b7\u7ed3\u5408\u4e00\u7ef4\u6570\u7ec4\u4f20\u53c2\u7684\u672c\u8d28，\u6307\u9488\u6570\u7ec4\u7684\u6570\u7ec4\u540d\u5728\u975esizeof\/&\u573a\u666f\u4e0b，\u4f1a\u88ab\u7f16\u8bd1\u5668\u9690\u5f0f\u8f6c\u6362\u4e3a\u4e8c\u7ea7\u6307\u9488\u3002<\/p>\n

\u00b7\u7528\u6307\u9488\u6570\u7ec4\u6a21\u62df\u4e8c\u7ef4\u6570\u7ec4\u662f C \u8bed\u8a00\u7684\u7ecf\u5178\u7528\u6cd5，\u6838\u5fc3\u539f\u7406\u662f\u8ba9\u6307\u9488\u6570\u7ec4\u7684\u6bcf\u4e2a\u4e00\u7ea7\u6307\u9488\u5143\u7d20，\u6307\u5411\u4e00\u4e2a\u72ec\u7acb\u7684\u4e00\u7ef4\u6570\u7ec4，\u901a\u8fc7 \u201c\u6307\u9488\u6570\u7ec4 + \u591a\u4e2a\u4e00\u7ef4\u6570\u7ec4\u201d \u7684\u7ec4\u5408\u5b9e\u73b0\u4e8c\u7ef4\u6570\u7ec4\u7684\u8bbf\u95ee\u6548\u679c\u3002\u8fd9\u79cd\u65b9\u5f0f\u76f8\u6bd4\u539f\u751f\u4e8c\u7ef4\u6570\u7ec4\u66f4\u7075\u6d3b\u3002<\/p>\n

#include<stdio.h>
\nint main()
\n{
\nint arr1[3] = { 1,2,3 };
\nint arr2[3] = { 4,5,6 };
\nint arr3[3] = { 7,8,9 };
\nint* arr[3] = { arr1,arr2,arr3 };
\nfor (int i = 0; i < 3; i++) {
\nfor (int j = 0; j < 3; j++) {
\nprintf("%d ", arr[i][j]);\/\/arr[i][j]==*(*(arr+i)+j)
\n}
\nprintf("\\\\n");
\n}
\nreturn 0;
\n} <\/p>\n

\u00b7\u6ce8\u610f\u8fd9\u5e76\u975e\u771f\u6b63\u7684\u4e8c\u7ef4\u6570\u7ec4，\u56e0\u4e3a\u5185\u5b58\u5e76\u4e0d\u8fde\u7eed\u3002<\/p>\n

10.\u6570\u7ec4\u6307\u9488\u53d8\u91cf<\/p>\n

\u00b7\u6570\u7ec4\u6307\u9488\u53d8\u91cf（\u7b80\u79f0\u6570\u7ec4\u6307\u9488）\u662f C \u8bed\u8a00\u4e2d\u4e13\u95e8\u6307\u5411\u6574\u4e2a\u4e00\u7ef4\u6570\u7ec4\u7684\u6307\u9488\u53d8\u91cf，\u5176\u6838\u5fc3\u4f5c\u7528\u662f\u5b58\u50a8\u6574\u4e2a\u6570\u7ec4\u7684\u5185\u5b58\u5730\u5740，\u800c\u975e\u5355\u4e2a\u6570\u7ec4\u5143\u7d20\u7684\u5730\u5740，\u662f\u6279\u91cf\u64cd\u4f5c\u4e00\u7ef4\u6570\u7ec4\u3001\u5904\u7406\u4e8c\u7ef4\u6570\u7ec4\u7684\u5173\u952e\u8bed\u6cd5\u3002<\/p>\n

\/\/ \u5143\u7d20\u7c7b\u578b (*\u6570\u7ec4\u6307\u9488\u53d8\u91cf\u540d)[\u6574\u4e2a\u6570\u7ec4\u7684\u957f\u5ea6];<\/p>\n

\u7c7b\u578b (*pArr)[N];<\/p>\n

\/\/\u8fd9\u8fb9\u7684()\u6d89\u53ca\u5230\u64cd\u4f5c\u7b26\u7684\u4f18\u5148\u7ea7<\/p>\n

\u00b7<\/p>\n

\u00b7\u6570\u7ec4\u6307\u9488\u7684\u672c\u8d28\u662f\u6307\u9488，\u4f46\u5e76\u975e\u666e\u901a\u6307\u9488（\u5982\u4e00\u7ea7\u6307\u9488）\u2014\u2014 \u5b83\u662f **\u201c\u6570\u7ec4\u7c7b\u578b\u7684\u6307\u9488\u201d，\u5176\u6307\u5411\u7684\u5bf9\u8c61\u662f\u6574\u4e2a\u4e00\u7ef4\u6570\u7ec4 **，\u800c\u975e\u5355\u4e2a\u5143\u7d20\u3002<\/p>\n

\u00b7\u6570\u7ec4\u6307\u9488\u53ea\u80fd\u6307\u5411 \u201c\u957f\u5ea6\u3001\u5143\u7d20\u7c7b\u578b\u5b8c\u5168\u5339\u914d\u201d\u7684\u4e00\u7ef4\u6570\u7ec4，\u521d\u59cb\u5316\u65f6\u901a\u8fc7&\u6570\u7ec4\u540d\u83b7\u53d6\u6574\u4e2a\u6570\u7ec4\u7684\u5730\u5740 **（\u800c\u975e\u9996\u5143\u7d20\u5730\u5740）\u8d4b\u503c\u7ed9\u5b83：<\/p>\n

int arr[]={1,2,3,4,5};<\/p>\n

int (*pArr)[5]=&arr;<\/p>\n

\u6570\u7ec4\u6307\u9488\u6307\u5411\u6574\u4e2a\u6570\u7ec4，\u9700\u5148\u901a\u8fc7\u4e00\u6b21\u89e3\u5f15\u7528*pArr\u62ff\u5230\u6574\u4e2a\u6570\u7ec4\u7684\u6570\u7ec4\u540d（\u7b49\u4ef7\u4e8e\u539f\u6570\u7ec4\u540darr），\u518d\u901a\u8fc7\u4e0b\u6807\u6cd5[]\u00a0\u8bbf\u95ee\u5177\u4f53\u5143\u7d20：<\/p>\n

(*pArr)[i]==arr[i] \/\/*pArr==arr<\/p>\n

11.\u4e8c\u7ef4\u6570\u7ec4\u4f20\u53c2\u7684\u672c\u8d28<\/p>\n

\u00b7\u6709\u4e86\u6570\u7ec4\u6307\u9488\u7684\u7406\u89e3，\u6211\u4eec\u5c31\u80fd\u591f\u63a2\u8ba8\u2f00\u4e0b\u2f06\u7ef4\u6570\u7ec4\u4f20\u53c2\u7684\u672c\u8d28\u4e86\u3002<\/span><\/p>\n

\u00b7\u4f46\u6211\u4eec\u9700\u8981\u5c06\u4e00\u4e2a\u4e8c\u7ef4\u6570\u7ec4\u4f20\u7ed9\u51fd\u6570\u7684\u65f6\u5019，\u6211\u4eec\u662f\u8fd9\u6837\u5b9e\u73b0\u7684：<\/span><\/p>\n

\u7c7b\u578b<\/span> <\/span>\u51fd\u6570\u540d<\/span>（<\/span>\u7c7b\u578b<\/span> arr[][N],…,….）<\/span><\/p>\n

{<\/span><\/p>\n

\u00a0 \u00a0 ……….<\/span><\/p>\n

}<\/span><\/p>\n

\u00b7\u8fd9\u91cc\u5b9e\u53c2\u662f\u2f06\u7ef4\u6570\u7ec4，\u5f62\u53c2\u4e5f\u5199\u6210\u2f06\u7ef4\u6570\u7ec4\u7684\u5f62\u5f0f，\u90a3\u8fd8\u6709\u4ec0\u4e48\u5176\u4ed6\u7684\u5199\u6cd5\u5417？ <\/span><\/p>\n

\u00b7\u6211\u4eec\u518d\u6b21\u7406\u89e3\u2f00\u4e0b\u2f06\u7ef4\u6570\u7ec4，\u2f06\u7ef4\u6570\u7ec4\u5176\u5b9e\u53ef\u4ee5\u770b\u505a\u662f\u6bcf\u4e2a\u5143\u7d20\u662f\u2f00\u7ef4\u6570\u7ec4\u7684\u6570\u7ec4，\u4e5f\u5c31\u662f\u2f06\u7ef4 <\/span><\/p>\n

\u6570\u7ec4\u7684\u6bcf\u4e2a\u5143\u7d20\u662f\u2f00\u4e2a\u2f00\u7ef4\u6570\u7ec4\u3002\u90a3\u4e48\u2f06\u7ef4\u6570\u7ec4\u7684\u9996\u5143\u7d20\u5c31\u662f\u7b2c\u2f00\u884c，\u662f\u4e2a\u2f00\u7ef4\u6570\u7ec4\u3002<\/span><\/p>\n

\"\"<\/p>\n

\u00b7\u6240\u4ee5，\u6839\u636e\u6570\u7ec4\u540d\u662f\u6570\u7ec4\u9996\u5143\u7d20\u7684\u5730\u5740\u8fd9\u4e2a\u89c4\u5219，\u2f06\u7ef4\u6570\u7ec4\u7684\u6570\u7ec4\u540d\u8868\u793a\u7684\u5c31\u662f\u7b2c\u2f00\u884c\u7684\u5730\u5740，\u662f\u2f00 \u7ef4\u6570\u7ec4\u7684\u5730\u5740\u3002\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u5c06\u4e8c\u7ef4\u6570\u7ec4\u4f20\u53c2\u6539\u5199\u4e3a：<\/span><\/p>\n

\u7c7b\u578b<\/span> <\/span>\u51fd\u6570\u540d<\/span>(<\/span>\u7c7b\u578b<\/span> (*pArr)[N],..,…)<\/span><\/p>\n

{<\/span><\/p>\n

\u00a0 \u00a0 ……<\/span><\/p>\n

}<\/span><\/p>\n

\u00b7\u4e8c\u7ef4\u6570\u7ec4\u4f20\u53c2\u7684\u6838\u5fc3\u672c\u8d28\u662f：\u4f20\u9012\u6307\u5411\u4e8c\u7ef4\u6570\u7ec4\u9996\u884c\u7684\u6570\u7ec4\u6307\u9488（\u5373\u6307\u5411\u4e8c\u7ef4\u6570\u7ec4\u4e2d \u201c\u6bcf\u4e00\u884c\u4e00\u7ef4\u6570\u7ec4\u201d \u7684\u6570\u7ec4\u6307\u9488），\u5e76\u975e\u4f20\u9012\u6574\u4e2a\u4e8c\u7ef4\u6570\u7ec4，\u4e5f\u975e\u4e8c\u7ea7\u6307\u9488\u3002\u5176\u5e95\u5c42\u6e90\u4e8e\u4e8c\u7ef4\u6570\u7ec4\u7684\u672c\u8d28\u662f \u201c\u4e00\u7ef4\u6570\u7ec4\u7684\u6570\u7ec4\u201d，\u7ed3\u5408\u6570\u7ec4\u540d\u7684\u9690\u5f0f\u8f6c\u6362\u89c4\u5219，\u6700\u7ec8\u51b3\u5b9a\u4e86\u4f20\u53c2\u7684\u7c7b\u578b\u548c\u8bed\u6cd5\u8981\u6c42\u3002<\/p>\n

12.\u51fd\u6570\u6307\u9488\u53d8\u91cf<\/p>\n

\u00b7\u6839\u636e\u524d\u9762\u5b66\u4e60\u6574\u578b\u6307\u9488，\u6570\u7ec4\u6307\u9488\u7684\u65f6\u5019，\u6211\u4eec\u6765\u7c7b\u6bd4\u5173\u7cfb，\u6211\u4eec\u4e0d\u96be\u5f97\u51fa\u7ed3\u8bba：\u51fd\u6570\u6307\u9488\u53d8\u91cf\u5e94\u8be5\u662f\u7528\u6765\u5b58\u653e\u51fd\u6570\u5730\u5740\u7684，\u672a\u6765\u901a\u8fc7\u5730\u5740\u80fd\u591f\u8c03\u7528\u51fd\u6570\u7684\u3002<\/span><\/p>\n

\u00b7<\/span>C \u8bed\u8a00\u4e2d\u6bcf\u4e2a\u51fd\u6570\u5728\u5185\u5b58\u4e2d\u90fd\u6709\u552f\u4e00\u7684\u5165\u53e3\u5730\u5740（\u51fd\u6570\u6267\u884c\u7684\u8d77\u59cb\u5185\u5b58\u5730\u5740），\u51fd\u6570\u540d\u5728\u8868\u8fbe\u5f0f\u4e2d\u4f1a\u76f4\u63a5\u8868\u793a\u8fd9\u4e2a\u5165\u53e3\u5730\u5740；\u800c\u51fd\u6570\u6307\u9488\u53d8\u91cf\u5c31\u662f\u7528\u4e8e\u5b58\u50a8\u8be5\u5730\u5740\u7684\u53d8\u91cf，\u672c\u8d28\u662f\u6307\u5411\u51fd\u6570\u7684\u6307\u9488，\u901a\u8fc7\u5b83\u53ef\u4ee5\u95f4\u63a5\u8c03\u7528\u5bf9\u5e94\u51fd\u6570\u3002<\/p>\n

\/\/ \u65e0\u53c2\u65e0\u8fd4\u56de\u503c\u51fd\u6570\u7684\u6307\u9488 \u8fd4\u56de\u503c\u7c7b\u578b (*\u51fd\u6570\u6307\u9488\u53d8\u91cf\u540d)(\u53c2\u6570\u7c7b\u578b\u5217\u8868);<\/p>\n

\/\/ \u793a\u4f8b：\u6307\u5411int add(int, int)\u7684\u51fd\u6570\u6307\u9488<\/p>\n

int<\/span> (*pf)(int<\/span>, int<\/span>);<\/p>\n

\u00b7\u8c03\u7528\u65f6\u901a\u8fc7(*pf)(\u53c2\u6570)\u6216\u7b80\u5316\u7684pf(\u53c2\u6570)\u5b9e\u73b0\u95f4\u63a5\u8c03\u7528：<\/p>\n

#include <stdio.h>
\nint add(int a, int b) {
\n return a + b;
\n}<\/p>\n

int main() {
\n int (*pf)(int, int) = add; \/\/ \u7b49\u4ef7\u4e8e int (*pf)(int, int) = &add;（&\u53ef\u7701\u7565）
\n \/\/ \u65b9\u5f0f1：\u6807\u51c6\u8c03\u7528（\u89e3\u5f15\u7528+\u4f20\u53c2，\u7b26\u5408\u6307\u9488\u8c03\u7528\u903b\u8f91）
\n int res1 = (*pf)(2, 3);
\n \/\/ \u65b9\u5f0f2：\u7b80\u5316\u8c03\u7528（\u7f16\u8bd1\u5668\u81ea\u52a8\u89e3\u6790，\u63a8\u8350，\u66f4\u7b80\u6d01）
\n int res2 = pf(2, 3);
\n \/\/ \u76f4\u63a5\u8c03\u7528\u51fd\u6570（\u5bf9\u6bd4\u53c2\u8003）
\n int res3 = add(2, 3);
\n printf("(*pf)(2,3)=%d, pf(2,3)=%d, add(2,3)=%d\\\\n", res1, res2, res3);
\n return 0;
\n} <\/p>\n

\u00b7\u8f93\u51fa\u7ed3\u679c\u5982\u4e0b：<\/p>\n

(*pf)(2,3)=5,pf(2,3)=5,add(2,3)=5<\/p>\n

13.typedef<\/p>\n

\u00b7typedef \u662f C \u8bed\u8a00\u7684\u7c7b\u578b\u91cd\u5b9a\u4e49 \/ \u7c7b\u578b\u522b\u540d\u5173\u952e\u5b57，\u6838\u5fc3\u4f5c\u7528\u662f\u4e3a\u5df2\u5b58\u5728\u7684\u6570\u636e\u7c7b\u578b\u521b\u5efa\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684\u65b0\u522b\u540d，\u5e76\u975e\u5b9a\u4e49\u65b0\u7c7b\u578b\u3002\u5176\u6838\u5fc3\u4ef7\u503c\u662f\u7b80\u5316\u590d\u6742\u7c7b\u578b\u7684\u4e66\u5199\u3001\u63d0\u5347\u4ee3\u7801\u53ef\u8bfb\u6027\u4e0e\u53ef\u7ef4\u62a4\u6027，\u662f\u5f00\u53d1\u4e2d\u5904\u7406\u6307\u9488\u3001\u7ed3\u6784\u4f53\u3001\u6570\u7ec4\u7b49\u590d\u6742\u7c7b\u578b\u7684\u5e38\u7528\u6280\u5de7\u3002<\/p>\n

\/\/ \u8bed\u6cd5：typedef \u539f\u6570\u636e\u7c7b\u578b \u81ea\u5b9a\u4e49\u522b\u540d;<\/p>\n

typedef<\/span> \u539f\u7c7b\u578b<\/span> \u65b0\u522b\u540d<\/span>;<\/p>\n

\/\/\u5b9a\u4e49\u5185\u7f6e\u7c7b\u578b<\/p>\n

\/\/\u4ee5int\u6539\u4e3aINT\u4e3a\u4f8b<\/p>\n

typedef<\/span> int<\/span> INT<\/span>;<\/span><\/p>\n

\u00b7\u4f46\u662f\u5bf9\u4e8e\u6570\u7ec4\u6307\u9488\u548c\u51fd\u6570\u6307\u9488\u7a0d\u5fae\u6709\u70b9\u533a\u522b，\u6bd4\u5982\u6211\u4eec\u6709\u6570\u7ec4\u6307\u9488\u7c7b\u578b int(*)[5] <\/span>,\u9700\u8981\u91cd\u547d\u540d\u4e3a <\/span>parr_t <\/span>，\u90a3\u53ef\u4ee5\u8fd9\u6837\u5199：<\/span><\/p>\n

typedef <\/span>
\n int<\/span>
\n (*<\/span>
\n parr_t<\/span>
\n )[5]; <\/span>
\n \/\/<\/span>
\n \u65b0\u7684\u7c7b\u578b\u540d\u5fc5\u987b\u5728<\/span>
\n *<\/span>
\n \u7684\u53f3\u8fb9<\/span><\/p>\n

\u00b7\u51fd\u6570\u6307\u9488\u7c7b\u578b\u7684\u91cd\u547d\u540d\u4e5f\u662f\u2f00\u6837\u7684，\u6bd4\u5982，\u5c06 <\/span>
\n void(*)(int) <\/span>
\n \u7c7b\u578b\u91cd\u547d\u540d\u4e3a <\/span>
\n pf_t <\/span>
\n ,\u5c31\u53ef\u4ee5\u8fd9\u6837\u5199：<\/span><\/p>\n

typedef<\/span>
\n <\/span>
\n void<\/span>
\n (*<\/span>
\n pf_t<\/span>
\n )(<\/span>
\n int<\/span>
\n );<\/span>
\n \/\/<\/span>
\n \u65b0\u7684\u7c7b\u578b\u540d\u5fc5\u987b\u5728<\/span>
\n *<\/span>
\n \u7684\u53f3\u8fb9<\/span><\/p>\n

14.\u56de\u8c03\u51fd\u6570<\/p>\n

\u00b7\u56de\u8c03\u51fd\u6570\u662f C \u8bed\u8a00\u4e2d\u57fa\u4e8e\u51fd\u6570\u6307\u9488\u5b9e\u73b0\u7684\u9ad8\u7ea7\u7f16\u7a0b\u6280\u5de7，\u6838\u5fc3\u5b9a\u4e49\u662f：\u4e00\u4e2a\u901a\u8fc7\u51fd\u6570\u6307\u9488\u4f20\u9012\u7ed9\u53e6\u4e00\u4e2a\u51fd\u6570（\u79f0\u4e3a\u300c\u4e3b\u8c03\u51fd\u6570\u300d）\u7684\u51fd\u6570，\u4e3b\u8c03\u51fd\u6570\u5728\u6267\u884c\u8fc7\u7a0b\u4e2d，\u4f1a\u901a\u8fc7\u8be5\u51fd\u6570\u6307\u9488\u95f4\u63a5\u8c03\u7528\u8fd9\u4e2a\u4f20\u5165\u7684\u51fd\u6570\u3002\u7b80\u5355\u6765\u8bf4，\u5c31\u662f\u628a\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u53e6\u4e00\u4e2a\u51fd\u6570\u5e76\u88ab\u5176\u8c03\u7528\u3002<\/p>\n

\u00b7\u56de\u8c03\u51fd\u6570\u7684\u5b9e\u73b0\u5b8c\u5168\u4f9d\u8d56\u51fd\u6570\u6307\u9488，\u672c\u8d28\u662f\u300c\u51fd\u6570\u5730\u5740\u7684\u4f20\u9012\u4e0e\u95f4\u63a5\u8c03\u7528\u300d，\u6838\u5fc3\u6d41\u7a0b\u5206 3 \u6b65，\u5c42\u5c42\u9012\u8fdb\u4e14\u903b\u8f91\u6e05\u6670：<\/p>\n

\u00b7\u6b65\u9aa4 1：\u5b9a\u4e49\u56de\u8c03\u51fd\u6570（\u5f85\u4f20\u9012\u3001\u88ab\u95f4\u63a5\u8c03\u7528\u7684\u51fd\u6570）<\/p>\n

\u00b7\u6839\u636e\u4e1a\u52a1\u9700\u6c42\u5b9a\u4e49\u51fd\u6570，\u9700\u63d0\u524d\u7ea6\u5b9a\u8fd4\u56de\u503c\u7c7b\u578b\u3001\u53c2\u6570\u7c7b\u578b\u53ca\u4e2a\u6570（\u5373\u51fd\u6570\u539f\u578b），\u8fd9\u662f\u540e\u7eed\u51fd\u6570\u6307\u9488\u5339\u914d\u7684\u57fa\u7840\u3002<\/p>\n

\u00b7\u6b65\u9aa4 2：\u5b9a\u4e49\u4e3b\u8c03\u51fd\u6570（\u63a5\u6536\u51fd\u6570\u6307\u9488\u3001\u8c03\u7528\u56de\u8c03\u51fd\u6570\u7684\u51fd\u6570）<\/p>\n

\u00b7\u4e3b\u8c03\u51fd\u6570\u7684\u53c2\u6570\u4e2d\u5305\u542b\u51fd\u6570\u6307\u9488，\u8be5\u51fd\u6570\u6307\u9488\u7684\u539f\u578b\u5fc5\u987b\u4e0e\u56de\u8c03\u51fd\u6570\u4e25\u683c\u4e00\u81f4；\u4e3b\u8c03\u51fd\u6570\u5185\u90e8\u901a\u8fc7\u8fd9\u4e2a\u51fd\u6570\u6307\u9488，\u95f4\u63a5\u8c03\u7528\u4f20\u5165\u7684\u56de\u8c03\u51fd\u6570\u3002<\/p>\n

\u00b7\u6b65\u9aa4 3：\u8c03\u7528\u4e3b\u8c03\u51fd\u6570，\u5c06\u56de\u8c03\u51fd\u6570\u7684\u5730\u5740\u4f5c\u4e3a\u53c2\u6570\u4f20\u5165<\/p>\n

\u51fd\u6570\u540d\u672c\u8eab\u5c31\u662f\u51fd\u6570\u7684\u5165\u53e3\u5730\u5740，\u76f4\u63a5\u5c06\u56de\u8c03\u51fd\u6570\u540d\u4f20\u9012\u7ed9\u4e3b\u8c03\u51fd\u6570（\u65e0\u9700\u52a0&，\u52a0\u4e86\u4e5f\u5408\u6cd5），\u4e3b\u8c03\u51fd\u6570\u63a5\u6536\u540e\u5373\u53ef\u89e6\u53d1\u56de\u8c03\u3002<\/p>\n

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

\/\/ \u6b65\u9aa41：\u5b9a\u4e49\u56de\u8c03\u51fd\u6570（\u5f85\u4f20\u9012\u7684\u51fd\u6570）
\nvoid myCallback() {
\n printf("\u6211\u662f\u56de\u8c03\u51fd\u6570，\u88ab\u4e3b\u8c03\u51fd\u6570\u8c03\u7528\u4e86！\\\\n");
\n}<\/p>\n

\/\/ \u6b65\u9aa42：\u5b9a\u4e49\u4e3b\u8c03\u51fd\u6570（\u53c2\u6570\u4e3a\u51fd\u6570\u6307\u9488，\u5339\u914d\u56de\u8c03\u51fd\u6570\u539f\u578b）
\n\/\/ void (*fp)() \u662f\u51fd\u6570\u6307\u9488，\u6307\u5411\u201c\u65e0\u53c2\u3001\u65e0\u8fd4\u56de\u503c\u201d\u7684\u51fd\u6570
\nvoid callerFunc(void (*fp)()) {
\n printf("\u6211\u662f\u4e3b\u8c03\u51fd\u6570，\u51c6\u5907\u8c03\u7528\u56de\u8c03\u51fd\u6570…\\\\n");
\n fp(); \/\/ \u6838\u5fc3：\u901a\u8fc7\u51fd\u6570\u6307\u9488\u95f4\u63a5\u8c03\u7528\u56de\u8c03\u51fd\u6570（\u56de\u8c03\u89e6\u53d1）
\n}<\/p>\n

\/\/ \u6b65\u9aa43：\u4e3b\u7a0b\u5e8f\u8c03\u7528，\u4f20\u9012\u56de\u8c03\u51fd\u6570\u5730\u5740
\nint main() {
\n callerFunc(myCallback); \/\/ \u4f20\u5165\u56de\u8c03\u51fd\u6570\u540d（\u5373\u51fd\u6570\u5730\u5740）
\n return 0;
\n} <\/p>\n

\u6211\u662f\u4e3b\u8c03\u51fd\u6570，\u51c6\u5907\u8c03\u7528\u56de\u8c03\u51fd\u6570…<\/p>\n

\u6211\u662f\u56de\u8c03\u51fd\u6570，\u88ab\u4e3b\u8c03\u51fd\u6570\u8c03\u7528\u4e86！<\/p>\n

15.qsort<\/p>\n

\u00b7qsort\u662f C \u6807\u51c6\u5e93<stdlib.h>\u4e2d\u7684\u901a\u7528\u5feb\u901f\u6392\u5e8f\u51fd\u6570，\u652f\u6301\u5bf9\u4efb\u610f\u7c7b\u578b\u6570\u636e（\u6574\u578b\u3001\u6d6e\u70b9\u578b\u3001\u7ed3\u6784\u4f53\u3001\u5b57\u7b26\u4e32\u7b49）\u8fdb\u884c\u6392\u5e8f，\u6838\u5fc3\u4f18\u52bf\u662f\u7c7b\u578b\u65e0\u5173\u3001\u901a\u7528\u6027\u5f3a，\u5176\u5e95\u5c42\u57fa\u4e8e\u5feb\u901f\u6392\u5e8f\u7b97\u6cd5\u5b9e\u73b0，\u5bf9\u5916\u901a\u8fc7\u56de\u8c03\u51fd\u6570\u89e3\u8026\u6392\u5e8f\u903b\u8f91\u4e0e\u6570\u636e\u7c7b\u578b\u5224\u65ad，\u662f\u56de\u8c03\u51fd\u6570\u7684\u7ecf\u5178\u5de5\u4e1a\u7ea7\u5e94\u7528\u3002<\/p>\n

void<\/span> qsort<\/span>(<\/p>\n

void*<\/span> base, \/\/ \u5f85\u6392\u5e8f\u6570\u7ec4\u7684**\u9996\u5730\u5740（\u4efb\u610f\u7c7b\u578b\u6570\u7ec4\u9996\u5143\u7d20\u5730\u5740，void*\u517c\u5bb9\u6240\u6709\u7c7b\u578b）<\/p>\n

size_t<\/span> nitems, \/\/ \u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u4e2a\u6570（size_t\u662f\u65e0\u7b26\u53f7\u6574\u578b，\u901a\u5e38\u7528sizeof\u8ba1\u7b97）<\/p>\n

size_t<\/span> size, \/\/ \u6570\u7ec4\u4e2d\u5355\u4e2a\u5143\u7d20\u7684\u5b57\u8282\u5927\u5c0f（\u5982int\u53604\u5b57\u8282）<\/p>\n

int<\/span> (*<\/span>compare)(const void*, const void*)<\/span> \/\/ \u6bd4\u8f83\u56de\u8c03\u51fd\u6570\u6307\u9488（\u6838\u5fc3：\u81ea\u5b9a\u4e49\u6570\u636e\u6bd4\u8f83\u89c4\u5219） );<\/p>\n

\u00b7qsort\u7684\u901a\u7528\u6027\u5b8c\u5168\u4f9d\u8d56\u6bd4\u8f83\u56de\u8c03\u51fd\u6570，\u7528\u6237\u9700\u6839\u636e\u5f85\u6392\u5e8f\u6570\u636e\u7c7b\u578b\u7f16\u5199\u7b26\u5408\u89c4\u5219\u7684\u56de\u8c03\u51fd\u6570，qsort<\/font>\u5185\u90e8\u4f1a\u9891\u7e41\u8c03\u7528\u8be5\u51fd\u6570\u5224\u65ad\u5143\u7d20\u5927\u5c0f，\u5b9e\u73b0\u6392\u5e8f\u3002<\/p>\n

\u00b7\u56de\u8c03\u51fd\u6570\u5f3a\u5236\u539f\u578b<\/p>\n

int<\/span> (*compar)(const void*<\/span> a, const void*<\/span> b);<\/p>\n

\u00b7\u53c2\u6570：const void* a\u3001const void* b \u2192 \u6307\u5411\u5f85\u6bd4\u8f83\u7684\u4e24\u4e2a\u5143\u7d20，const\u4fdd\u8bc1\u4e0d\u4fee\u6539\u539f\u6570\u636e，void*\u517c\u5bb9\u4efb\u610f\u7c7b\u578b；<\/p>\n

\u00b7\u8fd4\u56de\u503c：int \u2192 \u4e25\u683c\u901a\u8fc7\u8fd4\u56de\u503c\u8868\u793a\u4e24\u4e2a\u5143\u7d20\u7684\u5927\u5c0f\u5173\u7cfb，qsort\u6839\u636e\u8fd4\u56de\u503c\u51b3\u5b9a\u5143\u7d20\u4f4d\u7f6e，\u89c4\u5219\u5982\u4e0b：<\/p>\n

< 0\u00a0 \u00a0a\u5c0f\u4e8eb\u00a0 \u00a0a\u6392\u5728b\u524d\u9762<\/p>\n

= 0\u00a0 \u00a0a\u7b49\u4e8eb\u00a0 \u00a0a\u548cb\u4f4d\u7f6e\u4e0d\u53d8<\/p>\n

> 0\u00a0 \u00a0a\u5927\u4e8eb\u00a0 \u00a0a\u6392\u5728b\u540e\u9762<\/p>\n

#include <stdio.h>
\n#include <stdlib.h>
\n\/\/ \u6bd4\u8f83\u56de\u8c03：\u6574\u578b\u5347\u5e8f（a < b \u8fd4\u56de<0，a > b \u8fd4\u56de>0）
\nint cmp_int_asc(const void* a, const void* b) {
\n \/\/ \u5f3a\u8f6c+\u89e3\u5f15\u7528，\u8fd4\u56de\u5dee\u503c
\n return *(const int*)a – *(const int*)b;
\n}
\n\/\/ \u6bd4\u8f83\u56de\u8c03：\u6574\u578b\u964d\u5e8f（\u53cd\u8f6ca\u548cb\u7684\u5dee\u503c）
\nint cmp_int_desc(const void* a, const void* b) {
\n return *(const int*)b – *(const int*)a;
\n}
\nint main() {
\n int arr[] = {5, 2, 9, 1, 3, 7};
\n int n = sizeof(arr) \/ sizeof(arr[0]); \/\/ \u8ba1\u7b97\u5143\u7d20\u4e2a\u6570
\n \/\/ \u5347\u5e8f\u6392\u5e8f
\n qsort(arr, n, sizeof(int), cmp_int_asc);
\n printf("\u6574\u578b\u5347\u5e8f：");
\n for (int i = 0; i < n; i++) printf("%d ", arr[i]); \/\/ 1 2 3 5 7 9
\n printf("\\\\n");
\n \/\/ \u964d\u5e8f\u6392\u5e8f
\n qsort(arr, n, sizeof(int), cmp_int_desc);
\n printf("\u6574\u578b\u964d\u5e8f：");
\n for (int i = 0; i < n; i++) printf("%d ", arr[i]); \/\/ 9 7 5 3 2 1
\n printf("\\\\n");
\n return 0;
\n} <\/p>\n

1 2 3 5 7 9<\/p>\n

9 7 5 3 2 1<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"

1.\u6307\u9488\u7684\u57fa\u672c\u6982\u5ff5
\n\u00b7\u6307\u9488\u7684\u5185\u5bb9\u662fC\u8bed\u8a00\u8bed\u6cd5\u7684\u4e3b\u8981\u5185\u5bb9，\u4e5f\u662fC\u8bed\u8a00\u7684\u96be\u70b9\u3002
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