{"id":92413,"date":"2026-08-10T09:24:46","date_gmt":"2026-08-10T01:24:46","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/92413.html"},"modified":"2026-08-10T09:24:46","modified_gmt":"2026-08-10T01:24:46","slug":"linux%e5%85%a5%e9%97%a8day14%ef%bc%88%e9%ab%98%e9%a2%91%e9%9a%be%e7%82%b9%ef%bc%9a%e6%8c%87%e9%92%88%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/92413.html","title":{"rendered":"Linux\u5165\u95e8DAY14\uff08\u9ad8\u9891\u96be\u70b9\uff1a\u6307\u9488\uff09"},"content":{"rendered":"

\u524d\u8a00<\/p>\n

\u5728C\u8bed\u8a00\u5b66\u4e60\u8fc7\u7a0b\u4e2d，\u6307\u9488\u5c5e\u4e8e\u91cd\u96be\u70b9，\u5f88\u591a\u540c\u5b66\u5bb9\u6613\u6df7\u6dc6\u6307\u9488\u6570\u7ec4\u3001\u6570\u7ec4\u6307\u9488\u3001\u6307\u9488\u51fd\u6570\u3001\u51fd\u6570\u6307\u9488\u51e0\u7ec4\u6982\u5ff5，\u505a\u9898\u5199\u4ee3\u7801\u7ecf\u5e38\u8e29\u5751\u3002\u672c\u6587\u7ed3\u5408\u8bfe\u5802\u7b14\u8bb0，\u68b3\u7406\u56db\u7c7b\u9ad8\u9891\u6307\u9488\u77e5\u8bc6\u70b9，\u533a\u5206\u6982\u5ff5\u672c\u8d28\u3001\u8bed\u6cd5\u3001\u4f7f\u7528\u573a\u666f\u4ee5\u53ca\u6613\u9519\u7981\u533a，\u9002\u5408\u671f\u672b\u590d\u4e60\u3001\u5237\u9898\u5de9\u56fa，\u5e2e\u52a9\u7406\u6e05\u6307\u9488\u76f8\u5173\u7684\u903b\u8f91，\u907f\u5f00\u91ce\u6307\u9488\u3001\u53c2\u6570\u7c7b\u578b\u4e0d\u5339\u914d\u7b49\u5e38\u89c1bug\u3002<\/p>\n

1 \u6307\u9488\u6570\u7ec4<\/p>\n

\u672c\u8d28：\u6570\u7ec4，\u6570\u7ec4\u4e2d\u5b58\u50a8\u7684\u5143\u7d20\u4e3a\u6307\u9488\u3002<\/p>\n

\u8bed\u6cd5\u683c\u5f0f：<\/p>\n

int *a[5];<\/p>\n

char *p[5];<\/p>\n

\u00a0int *a[5]\u00a0\u4ee3\u8868\u5b9a\u4e49\u6570\u7ec4，\u6570\u7ec4\u53ef\u4ee5\u5b58\u653e5\u4e2a\u00a0int*\u00a0\u7c7b\u578b\u6307\u9488；64\u4f4d\u73af\u5883\u4e0b\u4e00\u4e2a\u6307\u9488\u53608\u5b57\u8282，\u6574\u4e2a\u6570\u7ec4\u603b\u5927\u5c0f40\u5b57\u8282\u3002<\/p>\n

1.1 \u521d\u59cb\u5316<\/p>\n

\/\/ \u5c06\u6570\u7ec4\u5185\u5168\u90e8\u6307\u9488\u521d\u59cb\u5316\u4e3a\u7a7a\u6307\u9488<\/p>\n

char *p[5] = {NULL};<\/p>\n

\/\/ \u5b58\u653e\u5b57\u7b26\u4e32\u5e38\u91cf，\u6570\u7ec4\u4fdd\u5b58\u6bcf\u4e2a\u5b57\u7b26\u4e32\u7684\u9996\u5730\u5740<\/p>\n

char *p[5] = {"hello","world","how","are","you"};<\/p>\n

\u00a0p[0]\u00a0\u4e3a\u00a0char*\u00a0\u7c7b\u578b，\u4fdd\u5b58\u5b57\u7b26\u4e32\u00a0"hello"\u00a0\u9996\u5b57\u7b26\u00a0h\u00a0\u7684\u5730\u5740\u3002<\/p>\n

1.2 \u6307\u9488\u6570\u7ec4 VS \u4e8c\u7ef4\u5b57\u7b26\u6570\u7ec4（\u8003\u8bd5\u9ad8\u9891\u8003\u70b9）<\/p>\n

\/\/\u4e8c\u7ef4\u5b57\u7b26\u6570\u7ec4：\u5b58\u50a8\u5b57\u7b26\u4e32\u672c\u4f53，\u603b\u5b57\u8282\u65703*100=300\u5b57\u8282<\/p>\n

char str[3][100] = {"hello","world","how"};<\/p>\n

\/\/\u6307\u9488\u6570\u7ec4：\u4ec5\u5b58\u50a8\u5404\u4e2a\u5b57\u7b26\u4e32\u7684\u9996\u5730\u5740，3\u4e2a\u6307\u9488，64\u4f4d\u4e0b\u536024\u5b57\u8282<\/p>\n

char *pstr[3] = {"hello","world","how"};<\/p>\n

\u9879\u76ee \u4e8c\u7ef4\u5b57\u7b26\u6570\u7ec4 \u00a0char str[N][100]\u00a0 \u6307\u9488\u6570\u7ec4 \u00a0char *pstr[N]\u00a0<\/p>\n

\u5b58\u50a8\u5185\u5bb9 \u4fdd\u5b58\u5b57\u7b26\u4e32\u672c\u8eab \u4fdd\u5b58\u5404\u4e2a\u5b57\u7b26\u4e32\u7684\u9996\u5730\u5740<\/p>\n

\u6570\u7ec4\u540d\u9000\u5316\u7c7b\u578b \u6570\u7ec4\u6307\u9488 \u00a0char (*)[100]\u00a0 \u4e8c\u7ea7\u6307\u9488 \u00a0char **\u00a0<\/p>\n

\u5b57\u7b26\u4fee\u6539 \u53ef\u4ee5\u4fee\u6539\u6570\u7ec4\u5185\u6bcf\u4e00\u4e2a\u5b57\u7b26 \u5b57\u7b26\u4e32\u5e38\u91cf\u7a7a\u95f4\u4e0d\u53ef\u4fee\u6539<\/p>\n

\u6392\u5e8f\u4ea4\u6362 \u9700\u8981strcpy\u62f7\u8d1d\u5b57\u7b26\u4e32，\u5f00\u9500\u5927 \u76f4\u63a5\u4ea4\u6362\u6307\u9488，\u6548\u7387\u9ad8<\/p>\n

\u26a0\u6ce8\u610f：\u4e8c\u8005\u7c7b\u578b\u4e0d\u540c，\u4e0d\u80fd\u4e92\u76f8\u4f5c\u4e3a\u51fd\u6570\u5b9e\u53c2\u4f20\u9012，\u4f1a\u62a5\u7c7b\u578b\u4e0d\u5339\u914d\u8b66\u544a\u3002<\/p>\n

2 \u4e8c\u7ea7\u6307\u9488<\/p>\n

\u672c\u8d28：\u6307\u9488，\u7528\u4e8e\u5b58\u653e\u53e6\u4e00\u4e2a\u6307\u9488\u53d8\u91cf\u7684\u5730\u5740\u3002<\/p>\n

int **p; \/\/\u4fdd\u5b58int*\u7c7b\u578b\u6307\u9488\u53d8\u91cf\u7684\u5730\u5740<\/p>\n

char **p; \/\/\u4fdd\u5b58char*\u7c7b\u578b\u6307\u9488\u53d8\u91cf\u7684\u5730\u5740<\/p>\n

\u4e8c\u7ea7\u6307\u9488\u4e24\u5927\u4f7f\u7528\u573a\u666f<\/p>\n

1.\u00a0\u51fd\u6570\u5185\u90e8\u4fee\u6539\u5916\u90e8\u7684\u6307\u9488\u53d8\u91cf<\/p>\n

\u60f3\u8981\u5728\u88ab\u8c03\u7528\u51fd\u6570\u4fee\u6539\u4e3b\u51fd\u6570\u7684\u6307\u9488\u53d8\u91cf，\u5b9e\u53c2\u4f20\u9012\u6307\u9488\u53d8\u91cf\u7684\u5730\u5740，\u5f62\u53c2\u4f7f\u7528\u4e8c\u7ea7\u6307\u9488\u63a5\u6536\u3002<\/p>\n

2.\u00a0\u63a5\u6536\u6307\u9488\u6570\u7ec4<\/p>\n

\u6307\u9488\u6570\u7ec4\u7684\u6570\u7ec4\u540d\u4f20\u53c2\u65f6\u4f1a\u9000\u5316\u4e3a\u4e8c\u7ea7\u6307\u9488，\u51fd\u6570\u5f62\u53c2\u7528\u00a0char **\u00a0\u63a5\u6536\u3002<\/p>\n

\u793a\u4f8b\u4ee3\u7801：<\/p>\n

void func(char **p)<\/p>\n

{<\/p>\n

}<\/p>\n

int main()<\/p>\n

{<\/p>\n

char *arr[] = {"aa","bb"};<\/p>\n

func(arr); \/\/\u6570\u7ec4\u540darr\u9000\u5316\u4e3a char**<\/p>\n

return 0;<\/p>\n

}<\/p>\n

3 \u6307\u9488\u51fd\u6570（\u8fd4\u56de\u6307\u9488\u7684\u51fd\u6570）<\/p>\n

\u672c\u8d28：\u51fd\u6570，\u8be5\u51fd\u6570\u7684\u8fd4\u56de\u503c\u662f\u6307\u9488\u7c7b\u578b\u3002<\/p>\n

char* fun(void); \/\/\u6307\u9488\u51fd\u6570，\u8fd4\u56dechar*\u6307\u9488<\/p>\n

\u2705\u5141\u8bb8\u8fd4\u56de\u7684\u5730\u5740<\/p>\n

1.\u00a0static\u4fee\u9970\u7684\u9759\u6001\u53d8\u91cf\u7684\u5730\u5740<\/p>\n

2.\u00a0\u5168\u5c40\u53d8\u91cf\u7684\u5730\u5740<\/p>\n

3.\u00a0\u5b57\u7b26\u4e32\u5e38\u91cf\u7684\u5730\u5740<\/p>\n

4.\u00a0\u51fd\u6570\u53c2\u6570\u4f20\u9012\u8fdb\u6765\u7684\u5185\u5b58\u5730\u5740<\/p>\n

5.\u00a0\u5806\u4e0a\u7533\u8bf7\u3001\u5c1a\u672a\u91ca\u653e\u7684\u5185\u5b58\u5730\u5740<\/p>\n

\u274c\u7981\u6b62\u8fd4\u56de<\/p>\n

\u5c40\u90e8\u666e\u901a\u53d8\u91cf\u3001\u5c40\u90e8\u6570\u7ec4\u7684\u5730\u5740\u3002\u51fd\u6570\u6267\u884c\u7ed3\u675f，\u5c40\u90e8\u6808\u5185\u5b58\u88ab\u56de\u6536，\u8fd4\u56de\u5f97\u5230\u91ce\u6307\u9488\u3002<\/p>\n

\u9519\u8bef\u793a\u4f8b：<\/p>\n

int* bad(void)<\/p>\n

{<\/p>\n

int a = 10;<\/p>\n

return &a; \/\/\u9519\u8bef，\u8fd4\u56de\u91ce\u6307\u9488<\/p>\n

}<\/p>\n

4 \u51fd\u6570\u6307\u9488<\/p>\n

\u672c\u8d28：\u6307\u9488，\u4e13\u95e8\u7528\u6765\u5b58\u653e\u51fd\u6570\u7684\u5165\u53e3\u5730\u5740；\u51fd\u6570\u540d\u672c\u8eab\u5c31\u662f\u51fd\u6570\u5165\u53e3\u5730\u5740\u3002<\/p>\n

4.1 \u5b9a\u4e49\u8bed\u6cd5<\/p>\n

\u8fd4\u56de\u503c\u7c7b\u578b (*\u6307\u9488\u540d)(\u5f62\u53c2\u7c7b\u578b);<\/p>\n

\u793a\u4f8b：<\/p>\n

\/\/\u5b9a\u4e49\u51fd\u6570\u6307\u9488pfun，\u6307\u5411\u8fd4\u56deint\u3001\u62e5\u6709\u4e24\u4e2aint\u53c2\u6570\u7684\u51fd\u6570<\/p>\n

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

4.2 \u5b8c\u6574\u4f7f\u7528\u793a\u4f8b<\/p>\n

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

int add(int a,int b)<\/p>\n

{<\/p>\n

return a+b;<\/p>\n

}<\/p>\n

int main(void)<\/p>\n

{<\/p>\n

\/\/1.\u5b9a\u4e49\u521d\u59cb\u5316\u4e3a\u7a7a<\/p>\n

int (*pfun)(int,int) = NULL;<\/p>\n

\/\/2.\u8d4b\u503c，\u4fdd\u5b58\u51fd\u6570\u5165\u53e3\u5730\u5740<\/p>\n

pfun = add;<\/p>\n

\/\/3.\u8c03\u7528\u51fd\u6570，\u4e24\u79cd\u5199\u6cd5\u7b49\u4ef7<\/p>\n

int ret = pfun(10,20);<\/p>\n

\/\/int ret = add(10,20);<\/p>\n

printf("%d",ret);<\/p>\n

return 0;<\/p>\n

}<\/p>\n

4.3 \u6838\u5fc3\u5e94\u7528：\u56de\u8c03\u51fd\u6570<\/p>\n

\u5c06\u51fd\u6570\u6307\u9488\u4f5c\u4e3a\u53e6\u4e00\u4e2a\u51fd\u6570\u7684\u53c2\u6570\u8fdb\u884c\u4f20\u9012，\u8fd9\u4e2a\u4f20\u5165\u7684\u51fd\u6570\u79f0\u4e3a\u56de\u8c03\u51fd\u6570；<\/p>\n

\u4e3b\u8981\u4f5c\u7528：\u964d\u4f4e\u4ee3\u7801\u8026\u5408\u5ea6\u3002<\/p>\n

📌\u6613\u6df7\u6982\u5ff5\u901f\u67e5\u8868<\/p>\n

\u5199\u6cd5 \u540d\u79f0 \u672c\u8d28 \u4f20\u53c2\u9000\u5316\u7c7b\u578b<\/p>\n

\u00a0char *p[5]\u00a0 \u6307\u9488\u6570\u7ec4 \u6570\u7ec4，\u6570\u7ec4\u5143\u7d20\u4e3a\u6307\u9488 \u00a0char **\u00a0<\/p>\n

\u00a0char (*p)[100]\u00a0 \u6570\u7ec4\u6307\u9488 \u6307\u9488，\u6307\u5411\u4e00\u7ef4\u6570\u7ec4 \u65e0<\/p>\n

\u00a0char* fun()\u00a0 \u6307\u9488\u51fd\u6570 \u51fd\u6570，\u8fd4\u56de\u6307\u9488 \u65e0<\/p>\n

\u00a0int (*p)(int,int)\u00a0 \u51fd\u6570\u6307\u9488 \u6307\u9488，\u4fdd\u5b58\u51fd\u6570\u5165\u53e3\u5730\u5740 \u65e0<\/p>\n

\u505a\u9898\u5c0f\u6280\u5de7：\u89c2\u5bdf\u62ec\u53f7<\/p>\n

1.\u00a0\u00a0(*p)\u00a0\u5e26\u62ec\u53f7：\u4ee3\u8868\u662f\u6307\u9488；<\/p>\n

2.\u00a0\u00a0*p[]\u00a0\u65e0\u62ec\u53f7，\u00a0[]\u00a0\u4f18\u5148\u548c\u53d8\u91cf\u7ed3\u5408：\u4ee3\u8868\u662f\u6570\u7ec4\u3002<\/p>\n

\u5c0f\u7ed3<\/p>\n

\u672c\u6587\u533a\u5206\u4e86\u56db\u7ec4\u6781\u6613\u6df7\u6dc6\u7684\u6307\u9488\u76f8\u5173\u6982\u5ff5：\u6307\u9488\u6570\u7ec4\u3001\u4e8c\u7ea7\u6307\u9488\u3001\u6307\u9488\u51fd\u6570\u3001\u51fd\u6570\u6307\u9488\u3002<\/p>\n

1.\u00a0\u6307\u9488\u6570\u7ec4\u662f\u6570\u7ec4，\u5b58\u653e\u4e00\u5806\u6307\u9488，\u4f20\u53c2\u9000\u5316\u4e3a\u4e8c\u7ea7\u6307\u9488，\u5e38\u7528\u6765\u7ba1\u7406\u591a\u4e2a\u5b57\u7b26\u4e32\u5e38\u91cf\u3002<\/p>\n

2.\u00a0\u4e8c\u7ea7\u6307\u9488\u7528\u6765\u5b58\u653e\u6307\u9488\u7684\u5730\u5740，\u4e24\u5927\u7528\u9014：\u51fd\u6570\u5185\u4fee\u6539\u5916\u90e8\u6307\u9488\u3001\u63a5\u6536\u6307\u9488\u6570\u7ec4\u3002<\/p>\n

3.\u00a0\u6307\u9488\u51fd\u6570\u662f\u51fd\u6570，\u91cd\u70b9\u8bb0\u4f4f：\u4e0d\u80fd\u8fd4\u56de\u5c40\u90e8\u6808\u53d8\u91cf\u5730\u5740，\u907f\u514d\u91ce\u6307\u9488\u3002<\/p>\n

4.\u00a0\u51fd\u6570\u6307\u9488\u662f\u6307\u9488，\u5b58\u50a8\u51fd\u6570\u5165\u53e3，\u4e3b\u8981\u7528\u4e8e\u5b9e\u73b0\u56de\u8c03\u51fd\u6570，\u89e3\u8026\u4ee3\u7801\u3002<\/p>\n

\u6307\u9488\u662fC\u8bed\u8a00\u7684\u7075\u9b42，\u505a\u9898\u5199\u4ee3\u7801\u65f6，\u5148\u5206\u6e05\u201c\u5b83\u5230\u5e95\u662f\u6570\u7ec4\u8fd8\u662f\u51fd\u6570\u8fd8\u662f\u6307\u9488\u201d，\u5f88\u591a\u9519\u8bef\u5c31\u53ef\u4ee5\u76f4\u63a5\u89c4\u907f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u524d\u8a00\u5728C\u8bed\u8a00\u5b66\u4e60\u8fc7\u7a0b\u4e2d，\u6307\u9488\u5c5e\u4e8e\u91cd\u96be\u70b9，\u5f88\u591a\u540c\u5b66\u5bb9\u6613\u6df7\u6dc6\u6307\u9488\u6570\u7ec4\u3001\u6570\u7ec4\u6307\u9488\u3001\u6307\u9488\u51fd\u6570\u3001\u51fd\u6570\u6307\u9488\u51e0\u7ec4\u6982\u5ff5，\u505a\u9898\u5199\u4ee3\u7801\u7ecf\u5e38\u8e29\u5751\u3002\u672c\u6587\u7ed3\u5408\u8bfe\u5802\u7b14\u8bb0，\u68b3\u7406\u56db\u7c7b\u9ad8\u9891\u6307\u9488\u77e5\u8bc6\u70b9，\u533a\u5206\u6982\u5ff5\u672c\u8d28\u3001\u8bed\u6cd5\u3001\u4f7f\u7528\u573a\u666f\u4ee5\u53ca\u6613\u9519\u7981\u533a，\u9002\u5408\u671f\u672b\u590d\u4e60\u3001\u5237\u9898\u5de9\u56fa，\u5e2e\u52a9\u7406\u6e05\u6307\u9488\u76f8\u5173\u7684\u903b\u8f91，\u907f\u5f00\u91ce\u6307\u9488\u3001\u53c2\u6570\u7c7b\u578b\u4e0d\u5339\u914d\u7b49\u5e38\u89c1bug\u30021 \u6307\u9488\u6570\u7ec4\u672c\u8d28：\u6570\u7ec4，\u6570\u7ec4\u4e2d\u5b58\u50a8\u7684\u5143\u7d20\u4e3a\u6307<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[58,43,44],"topic":[],"class_list":["post-92413","post","type-post","status-publish","format-standard","hentry","category-server","tag-linux","tag-43","tag-44"],"yoast_head":"\nLinux\u5165\u95e8DAY14\uff08\u9ad8\u9891\u96be\u70b9\uff1a\u6307\u9488\uff09 - 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