\n| \u6307\u9488\u51fd\u6570<\/td>\n | \u662f\u4e00\u4e2a\u51fd\u6570，\u8fd4\u56de\u503c\u662f\u6307\u9488<\/td>\n | char *strcpy(char *dest, const char *src);<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\u6307\u9488\u51fd\u6570\u8003\u70b9<\/h4>\n\u4e0d\u8981\u8fd4\u56de\u5c40\u90e8\u53d8\u91cf\u7684\u5730\u5740\u3002<\/p>\n c<\/p>\n char *func()
\n{
\n char s[] = "hello";
\n return s; \/\/ \u9519\u8bef，s \u662f\u5c40\u90e8\u6570\u7ec4，\u51fd\u6570\u7ed3\u675f\u540e\u9500\u6bc1
\n}<\/p>\n \u5c40\u90e8\u53d8\u91cf\u5728\u6808\u4e0a，\u51fd\u6570\u8fd4\u56de\u540e\u7a7a\u95f4\u88ab\u56de\u6536，\u8fd4\u56de\u5b83\u7684\u5730\u5740\u4f1a\u53d8\u6210\u60ac\u7a7a\u6307\u9488\u3002<\/p>\n
\n\u4e09\u3001\u591a\u7ea7\u6307\u9488<\/h3>\n1. \u4e8c\u7ea7\u6307\u9488<\/h4>\nc<\/p>\n int a = 10;
\nint *p = &a;
\nint **q = &p;<\/p>\n \n- \n
p \u4fdd\u5b58 a \u7684\u5730\u5740；<\/p>\n<\/li>\n - \n
q \u4fdd\u5b58 p \u7684\u5730\u5740；<\/p>\n<\/li>\n - \n
*q \u5f97\u5230 p；<\/p>\n<\/li>\n - \n
**q \u5f97\u5230 a\u3002<\/p>\n<\/li>\n<\/ul>\n c<\/p>\n **q = 20; \/\/ \u7b49\u4ef7\u4e8e a = 20<\/p>\n 2. \u4ec0\u4e48\u65f6\u5019\u7528\u4e8c\u7ea7\u6307\u9488？<\/h4>\n\u5982\u679c\u8981\u4fdd\u5b58\u7684\u662f \u4e00\u7ea7\u6307\u9488\u53d8\u91cf\u7684\u5730\u5740，\u5c31\u9700\u8981\u4e8c\u7ea7\u6307\u9488\u3002<\/p>\n c<\/p>\n char *str[] = {"hello", "world", "china"};
\nchar **p = str;<\/p>\n \n- \n
str[0] \u7c7b\u578b\u662f char *；<\/p>\n<\/li>\n - \n
&str[0] \u7c7b\u578b\u662f char **\u3002<\/p>\n<\/li>\n<\/ul>\n 3. \u591a\u7ea7\u6307\u9488<\/h4>\nc<\/p>\n int a = 10;
\nint *p = &a;
\nint **q = &p;
\nint ***r = &q;<\/p>\n \u89c4\u5f8b：<\/p>\n \u6240\u5728\u7a7a\u95f4\u7684\u6570\u636e\u7c7b\u578b，\u5145\u5f53\u6307\u9488\u53d8\u91cf\u7684\u57fa\u7c7b\u578b\u3002<\/p>\n
\n\u56db\u3001\u6307\u9488\u6570\u7ec4\u4e0e\u6570\u7ec4\u6307\u9488<\/h3>\n1. \u6307\u9488\u6570\u7ec4<\/h4>\nc<\/p>\n char *s[5];<\/p>\n \u8fd9\u662f\u4e00\u4e2a\u6570\u7ec4，\u6570\u7ec4\u91cc\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f char *\u3002<\/p>\n c<\/p>\n char *str[] = {"hello", "world", "china"};<\/p>\n \u53ef\u4ee5\u5b58\u591a\u4e2a\u5b57\u7b26\u4e32\u3002<\/p>\n 2. \u6570\u7ec4\u6307\u9488<\/h4>\nc<\/p>\n int (*p)[4];<\/p>\n \u8fd9\u662f\u4e00\u4e2a\u6307\u9488，\u6307\u5411\u4e00\u4e2a\u6570\u7ec4，\u6570\u7ec4\u6709 4 \u4e2a int\u3002<\/p>\n \u4e8c\u7ef4\u6570\u7ec4\u5e38\u7528：<\/p>\n c<\/p>\n int a[3][4];
\nint (*p)[4] = a;<\/p>\n \u8bbf\u95ee：<\/p>\n c<\/p>\n a[i][j] <=> *(*(p + i) + j)<\/p>\n
\n\u4e94\u3001\u6307\u9488\u64cd\u4f5c\u4e8c\u7ef4\u6570\u7ec4<\/h3>\n1. \u6574\u578b\u4e8c\u7ef4\u6570\u7ec4<\/h4>\nc<\/p>\n int a[3][4] = {1,2,3,4,5,6,7,8,9,10};<\/p>\n \u4e8c\u7ef4\u6570\u7ec4\u672c\u8d28：\u4e00\u7ef4\u6570\u7ec4\u7684\u6570\u7ec4\u3002<\/p>\n c<\/p>\n int[4] a[3];<\/p>\n \n- \n
a[0] \u7c7b\u578b\u662f int[4]；<\/p>\n<\/li>\n - \n
&a[0] \u7c7b\u578b\u662f int(*)[4]\u3002<\/p>\n<\/li>\n<\/ul>\n \u6b63\u786e\u6307\u9488\u5199\u6cd5：<\/p>\n c<\/p>\n int (*p)[4] = a;<\/p>\n \u884c\u6307\u9488\u4e0e\u5217\u6307\u9488：<\/p>\n c<\/p>\n p + 1 \/\/ \u884c\u6307\u9488，\u6307\u5411\u4e0b\u4e00\u884c
\n*(p + 1) \/\/ \u5217\u6307\u9488，\u6307\u5411\u4e0b\u4e00\u884c\u9996\u5143\u7d20<\/p>\n \u8bbf\u95ee\u5143\u7d20：<\/p>\n c<\/p>\n *(*(p + i) + j)<\/p>\n 2. \u5b57\u7b26\u578b\u4e8c\u7ef4\u6570\u7ec4<\/h4>\nc<\/p>\n char s[5][10] = {"hello", "world", "english", "china", "america"};<\/p>\n \u6b63\u786e\u6307\u9488\u5199\u6cd5：<\/p>\n c<\/p>\n char (*p)[10] = s;<\/p>\n \u8bbf\u95ee\u5b57\u7b26\u4e32：<\/p>\n c<\/p>\n printf("%s\\\\n", p[i]);<\/p>\n
\n\u516d\u3001\u52a8\u6001\u5185\u5b58\u5206\u914d<\/h3>\n1. \u4e3a\u4ec0\u4e48\u9700\u8981\u5806\u533a？<\/h4>\n\u6570\u636e\u5b58\u50a8\u4f4d\u7f6e：<\/p>\n \n- \n
\u6808：\u81ea\u52a8\u7533\u8bf7，\u81ea\u52a8\u91ca\u653e；<\/p>\n<\/li>\n - \n
\u5168\u5c40\u533a：\u5168\u5c40\u53d8\u91cf\u3001\u9759\u6001\u53d8\u91cf；<\/p>\n<\/li>\n - \n
\u5806：\u624b\u52a8\u7533\u8bf7，\u624b\u52a8\u91ca\u653e，\u7a7a\u95f4\u5f88\u5927\u3002<\/p>\n<\/li>\n<\/ul>\n 2. malloc<\/h4>\nc<\/p>\n #include <stdlib.h><\/p>\n void *malloc(size_t size);<\/p>\n \n- \n
size：\u7533\u8bf7\u591a\u5c11\u5b57\u8282；<\/p>\n<\/li>\n - \n
\u6210\u529f\u8fd4\u56de\u5806\u533a\u7a7a\u95f4\u9996\u5730\u5740；<\/p>\n<\/li>\n - \n
\u5931\u8d25\u8fd4\u56de NULL\u3002<\/p>\n<\/li>\n<\/ul>\n \u793a\u4f8b：<\/p>\n c<\/p>\n int *p = (int *)malloc(10 * sizeof(int));
\nif (p == NULL) {
\n return -1;
\n}<\/p>\n 3. calloc<\/h4>\nc<\/p>\n void *calloc(size_t nmemb, size_t size);<\/p>\n \n- \n
nmemb：\u5143\u7d20\u4e2a\u6570；<\/p>\n<\/li>\n - \n
size：\u5355\u4e2a\u5143\u7d20\u5927\u5c0f；<\/p>\n<\/li>\n - \n
\u4f1a\u81ea\u52a8\u521d\u59cb\u5316\u4e3a 0\u3002<\/p>\n<\/li>\n<\/ul>\n 4. realloc<\/h4>\nc<\/p>\n void *realloc(void *ptr, size_t size);<\/p>\n \u529f\u80fd：\u91cd\u65b0\u7533\u8bf7\u4e00\u5757\u7a7a\u95f4\u3002<\/p>\n \n- \n
\u5982\u679c\u539f\u7a7a\u95f4\u540e\u9762\u591f，\u5c31\u6269\u5c55；<\/p>\n<\/li>\n - \n
\u5982\u679c\u4e0d\u591f，\u91cd\u65b0\u627e\u4e00\u5757\u8fde\u7eed\u7a7a\u95f4，\u590d\u5236\u539f\u6570\u636e，\u91ca\u653e\u539f\u7a7a\u95f4；<\/p>\n<\/li>\n - \n
ptr \u4e3a NULL \u65f6，\u6548\u679c\u76f8\u5f53\u4e8e malloc；<\/p>\n<\/li>\n - \n
size \u4e3a 0 \u65f6，\u6548\u679c\u76f8\u5f53\u4e8e free\u3002<\/p>\n<\/li>\n<\/ul>\n 5. free<\/h4>\nc<\/p>\n void free(void *ptr);<\/p>\n \u91ca\u653e\u5806\u533a\u7a7a\u95f4\u3002<\/p>\n \u6ce8\u610f：<\/p>\n \n- \n
\u4e0d\u80fd\u591a\u6b21 free；<\/p>\n<\/li>\n - \n
\u91ca\u653e\u540e\u6307\u9488\u53d8\u6210\u60ac\u7a7a\u6307\u9488，\u5efa\u8bae\u7f6e\u4e3a NULL\u3002<\/p>\n<\/li>\n<\/ul>\n c<\/p>\n free(p);
\np = NULL;<\/p>\n 6. \u7ec3\u4e60：\u5728\u5806\u533a\u5b9a\u4e49\u6570\u7ec4<\/h4>\nc<\/p>\n int *p = (int *)malloc(10 * sizeof(int));<\/p>\n for (int i = 0; i < 10; i++) {
\n p[i] = i + 1;
\n}<\/p>\n for (int i = 0; i < 10; i++) {
\n printf("%d ", p[i]);
\n}<\/p>\n free(p);
\np = NULL;<\/p>\n \u5173\u4e8e malloc \u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u7684\u8bf4\u660e<\/h4>\n\u5728 C \u8bed\u8a00\u4e2d，malloc \u8fd4\u56de void *，\u53ef\u4ee5\u81ea\u52a8\u8f6c\u6362\u6210\u4efb\u610f\u7c7b\u578b\u7684\u6307\u9488，\u6240\u4ee5 (int *) \u4e0d\u662f\u5fc5\u987b\u7684\u3002<\/p>\n c<\/p>\n int *p = malloc(10 * sizeof(int)); \/\/ C \u8bed\u8a00\u4e2d\u5408\u6cd5<\/p>\n \u4f46\u5728 C++ \u4e2d，void * \u4e0d\u80fd\u9690\u5f0f\u8f6c\u6362\u6210\u5176\u4ed6\u6307\u9488\u7c7b\u578b，\u5fc5\u987b\u5f3a\u5236\u8f6c\u6362：<\/p>\n cpp<\/p>\n int *p = (int *)malloc(10 * sizeof(int)); \/\/ C++ \u5fc5\u987b\u52a0<\/p>\n \u6240\u4ee5\u5f88\u591a\u6559\u6750\u548c\u4ee3\u7801\u52a0\u4e0a (int *)，\u539f\u56e0\u6709\u4e09：<\/p>\n - \n
\u517c\u5bb9 C++；<\/p>\n<\/li>\n - \n
\u663e\u5f0f\u8868\u660e\u610f\u56fe，\u4e00\u773c\u770b\u51fa\u8981\u5f53\u4f5c int \u6570\u7ec4\u7528；<\/p>\n<\/li>\n - \n
\u6d88\u9664\u67d0\u4e9b\u7f16\u8bd1\u5668\u7684\u8b66\u544a\u3002<\/p>\n<\/li>\n \u5199\u7eaf C \u4ee3\u7801\u65f6，\u63a8\u8350\u4e0d\u52a0\u5f3a\u5236\u8f6c\u6362，\u4f46\u4e00\u5b9a\u8981 #include <stdlib.h>\u3002
\n\u5982\u679c\u5fd8\u8bb0\u5305\u542b\u5934\u6587\u4ef6，\u7f16\u8bd1\u5668\u4f1a\u4ee5\u4e3a malloc \u8fd4\u56de int，\u5728 64 \u4f4d\u7cfb\u7edf\u4e0a\u53ef\u80fd\u5bfc\u81f4\u6307\u9488\u88ab\u622a\u65ad\u3002\u800c\u52a0\u4e0a (int *) \u53cd\u800c\u53ef\u80fd\u63a9\u76d6\u8fd9\u4e2a\u9519\u8bef\u3002<\/p>\n \u603b\u7ed3：<\/p>\n \n\u573a\u666f\u662f\u5426\u52a0 (int *)\u8bf4\u660e<\/tr>\n \n\n| \u7eaf C，\u5305\u542b <stdlib.h><\/td>\n | \u53ef\u52a0\u53ef\u4e0d\u52a0<\/td>\n | \u4e0d\u52a0\u66f4\u5b89\u5168，\u80fd\u66b4\u9732\u7f3a\u5c11\u5934\u6587\u4ef6\u7684\u95ee\u9898<\/td>\n<\/tr>\n | \n| C++<\/td>\n | \u5fc5\u987b\u52a0<\/td>\n | void * \u4e0d\u80fd\u9690\u5f0f\u8f6c\u6362<\/td>\n<\/tr>\n | \n| \u60f3\u517c\u5bb9 C\/C++<\/td>\n | \u52a0<\/td>\n | \u4e24\u8fb9\u90fd\u80fd\u7f16\u8bd1<\/td>\n<\/tr>\n | \n| \u8001\u7f16\u8bd1\u5668\u6709\u8b66\u544a<\/td>\n | \u52a0<\/td>\n | \u6d88\u9664\u8b66\u544a<\/td>\n<\/tr>\n | \n| \u5fd8\u8bb0\u5305\u542b <stdlib.h><\/td>\n | \u52a0\u53cd\u800c\u5371\u9669<\/td>\n | \u4f1a\u63a9\u76d6\u9519\u8bef，\u5bfc\u81f4\u6307\u9488\u622a\u65ad<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\u4e03\u3001main \u51fd\u6570\u4e0e\u547d\u4ee4\u884c\u53c2\u6570<\/h3>\nc<\/p>\n int main(int argc, const char *argv[])
\n{
\n return 0;
\n}<\/p>\n \n- \n
argc：\u547d\u4ee4\u884c\u53c2\u6570\u4e2a\u6570；<\/p>\n<\/li>\n - \n
argv：\u547d\u4ee4\u884c\u53c2\u6570\u5b57\u7b26\u4e32\u6570\u7ec4\u3002<\/p>\n<\/li>\n<\/ul>\n \u793a\u4f8b：<\/p>\n text<\/p>\n .\/a.out 2 2026<\/p>\n \u5219：<\/p>\n c<\/p>\n argc == 3<\/p>\n argv[0] = ".\/a.out"
\nargv[1] = "2"
\nargv[2] = "2026"
\nargv[3] = NULL<\/p>\n \u7ec3\u4e60：\u8f93\u51fa\u6240\u6709\u547d\u4ee4\u884c\u53c2\u6570<\/p>\n c<\/p>\n int main(int argc, char *argv[])
\n{
\n for (int i = 0; i < argc; i++) {
\n printf("argv[%d] = %s\\\\n", i, argv[i]);
\n }
\n return 0;
\n}<\/p>\n
\n\u516b\u3001\u603b\u7ed3<\/h3>\n\n\u77e5\u8bc6\u70b9\u6838\u5fc3\u7ed3\u8bba<\/tr>\n \n\n| \u51fd\u6570\u6307\u9488<\/td>\n | \u6307\u5411\u51fd\u6570\u7684\u6307\u9488，int (*p)(int, int)<\/td>\n<\/tr>\n | \n| \u6307\u9488\u51fd\u6570<\/td>\n | \u8fd4\u56de\u6307\u9488\u7684\u51fd\u6570，\u5982 char *strcpy(…)<\/td>\n<\/tr>\n | \n| \u56de\u8c03\u51fd\u6570<\/td>\n | \u901a\u8fc7\u51fd\u6570\u6307\u9488\u8c03\u7528\u51fd\u6570<\/td>\n<\/tr>\n | \n| \u4e8c\u7ea7\u6307\u9488<\/td>\n | \u4fdd\u5b58\u4e00\u7ea7\u6307\u9488\u7684\u5730\u5740，int **q<\/td>\n<\/tr>\n | \n| \u6307\u9488\u6570\u7ec4<\/td>\n | char *s[5]，\u5143\u7d20\u662f char *<\/td>\n<\/tr>\n | \n| \u6570\u7ec4\u6307\u9488<\/td>\n | int (*p)[4]，\u6307\u5411 int[4]<\/td>\n<\/tr>\n | \n| \u4e8c\u7ef4\u6570\u7ec4<\/td>\n | a[i][j] <=> *(*(p+i)+j)<\/td>\n<\/tr>\n | \n| malloc<\/td>\n | \u7533\u8bf7\u5806\u533a\u7a7a\u95f4，\u624b\u52a8\u91ca\u653e<\/td>\n<\/tr>\n | \n| calloc<\/td>\n | \u7533\u8bf7\u5e76\u521d\u59cb\u5316\u4e3a 0<\/td>\n<\/tr>\n | \n| realloc<\/td>\n | \u8c03\u6574\u5806\u533a\u7a7a\u95f4\u5927\u5c0f<\/td>\n<\/tr>\n | \n| free<\/td>\n | \u91ca\u653e\u5806\u533a\u7a7a\u95f4，\u907f\u514d\u60ac\u7a7a\u6307\u9488<\/td>\n<\/tr>\n | \n| \u547d\u4ee4\u884c\u53c2\u6570<\/td>\n | argc \u4e2a\u6570，argv \u5b57\u7b26\u4e32\u6570\u7ec4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":" \u6807\u7b7e：C\u8bed\u8a00\u3001\u6307\u9488\u3001\u51fd\u6570\u6307\u9488\u3001\u52a8\u6001\u5185\u5b58\u3001malloc\u3001\u547d\u4ee4\u884c\u53c2\u6570
\n\u672c\u6587\u662f\u300aC\u8bed\u8a00\u6307\u9488\u4ece\u5165\u95e8\u5230\u8fdb\u9636\u300b\u7684\u8865\u5145\u7bc7，\u91cd\u70b9\u6574\u7406\u51fd\u6570\u6307\u9488\u3001\u6307\u9488\u51fd\u6570\u3001\u5806\u533a\u5185\u5b58\u548c main \u53c2\u6570\u3002\u4e00\u3001\u51fd\u6570\u6307\u94881. \u51fd\u6570\u4e5f\u6709\u5730\u5740\u7a0b\u5e8f\u7f16\u8bd1\u540e，\u51fd\u6570\u4ee3\u7801\u4e5f\u4f1a\u653e\u5728\u5185\u5b58\u4e2d，\u6240\u4ee5\u51fd\u6570\u4e5f\u6709\u5730\u5740\u3002cint add(int a, int b)
\n{return a b;
\n}add \u662f\u51fd\u6570\u540d；\u51fd\u6570\u540d\u4ee3\u8868\u51fd\u6570\u7684\u5165\u53e3\u5730\u5740；\u4e5f\u5c31\u662f\u8bf4，ad<\/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":[55,1813,427],"topic":[],"class_list":["post-114669","post","type-post","status-publish","format-standard","hentry","category-server","tag-c","tag-1813","tag-427"],"yoast_head":"\n Linux \u5b66\u4e60\u7b14\u8bb0(\u5341\uff09C\u8bed\u8a00\u6307\u9488\u8fdb\u9636\u8865\u5145\uff1a\u51fd\u6570\u6307\u9488\u3001\u6307\u9488\u51fd\u6570\u3001\u52a8\u6001\u5185\u5b58\u4e0e\u547d\u4ee4\u884c\u53c2\u6570 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/114669.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Linux \u5b66\u4e60\u7b14\u8bb0(\u5341\uff09C\u8bed\u8a00\u6307\u9488\u8fdb\u9636\u8865\u5145\uff1a\u51fd\u6570\u6307\u9488\u3001\u6307\u9488\u51fd\u6570\u3001\u52a8\u6001\u5185\u5b58\u4e0e\u547d\u4ee4\u884c\u53c2\u6570 - 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