\u76ee\u5f55<\/p>\n
\u7ed3\u6784\u4f53<\/p>\n
\u533f\u540d\u7ed3\u6784\u4f53<\/p>\n
\u7ed3\u6784\u4f53\u7684\u81ea\u5f15\u7528<\/p>\n
\u7ed3\u6784\u4f53\u7684\u5185\u5b58\u5bf9\u9f50<\/p>\n
\u5bf9\u9f50\u89c4\u5219<\/p>\n
\u7ed3\u6784\u4f53\u5185\u5b58\u5bf9\u9f50\u7684\u539f\u56e0<\/p>\n
\u7ed3\u6784\u4f53\u4f20\u53c2<\/p>\n
\u4f4d\u6bb5<\/p>\n
\u4f4d\u6bb5\u7684\u58f0\u660e<\/p>\n
\u4f4d\u6bb5\u5982\u4f55\u5206\u914d\u5185\u5b58<\/p>\n
\u4f4d\u6bb5\u7684\u4e0d\u786e\u5b9a\u56e0\u7d20<\/p>\n
\u8054\u5408\u4f53<\/p>\n
\u8054\u5408\u4f53\u7684\u58f0\u660e<\/p>\n
\u8054\u5408\u4f53\u7684\u5927\u5c0f<\/p>\n
\u8054\u5408\u4f53\u7684\u5e94\u7528<\/p>\n
\u679a\u4e3e<\/p>\n
\u679a\u4e3e\u7684\u58f0\u660e<\/p>\n
\u679a\u4e3e\u7684\u4f7f\u7528<\/p>\n
\u679a\u4e3e\u76f8\u6bd4\u4e8e\u5b8f\u5b9a\u4e49\u201c#define\u201d\u7684\u4f18\u70b9<\/p>\n
\u7ed3\u6784\u4f53\u751f\u6d3b\u4e2d\u4e00\u7c7b\u5b9e\u7269\u62bd\u8c61\u51fa\u6765\u7684\u4e00\u4e2a\u5b9a\u4e49，\u7ed3\u6784\u4f53\u7684\u5b9a\u4e49\u548c\u7ed3\u6784\u4f53\u53d8\u91cf\u7684\u521b\u5efa\u4ee5\u53ca\u521d\u59cb\u5316\u5982\u4e0b：<\/p>\n
#include<stdio.h><\/p>\n
struct Std\/\/\u7ed3\u6784\u4f53\u7684\u521b\u5efa
\n{
\n int age;
\n char name[];
\n};
\nint main()
\n{
\n struct Std s1;\/\/\u7ed3\u6784\u4f53\u53d8\u91cf\u7684\u521b\u5efa
\n s1 = {18,"zhangsan"};\/\/\u7ed3\u6784\u4f53\u53d8\u91cf\u7684\u521d\u59cb\u5316
\n s1.age = 22;\/\/\u53ef\u5355\u72ec\u521d\u59cb\u5316
\n return 0;
\n} <\/p>\n
\u987e\u540d\u601d\u4e49：\u6ca1\u6709\u540d\u5b57\u7684\u7ed3\u6784\u4f53\u3002（\u4e00\u822c\u53ea\u80fd\u4f7f\u7528\u4e00\u6b21）\u5728\u4ee3\u7801\u4e2d\u7684\u5b9a\u4e49\u5982\u4e0b：<\/p>\n
#include<stdio.h><\/p>\n
struct
\n{
\n int a;
\n char b;
\n}x;\/\/\u521b\u5efa\u533f\u540d\u7ed3\u6784\u4f53\u53d8\u91cfx <\/p>\n
\u7ed3\u6784\u4f53\u81ea\u5df1\u5f15\u7528\u81ea\u5df1\u53eb\u505a\u7ed3\u6784\u4f53\u7684\u81ea\u5f15\u7528，（\u548c\u4e8c\u53c9\u6811\u7684\u539f\u7406\u76f8\u4f3c）\u5728\u4ee3\u7801\u4e2d\u7684\u4f7f\u7528\u5982\u4e0b：<\/p>\n
#include<stdio.h>
\nstruct Std
\n{
\n int a;
\n struct Std* next;\/\/\u5c06\u4e0b\u4e00\u4e2a\u540c\u7c7b\u578b\u7684\u7ed3\u6784\u4f53\u6307\u9488\u4f5c\u4e3a\u6210\u5458\u653e\u5728\u7ed3\u6784\u4f53\u4e2d
\n};<\/p>\n
PS：\u51fd\u6570\u201coffsetof（\u7c7b\u578b，\u6210\u5458）\u201d\u53ef\u4ee5\u6d4b\u8bd5\u51fa\u6210\u5458\u5730\u5740\u548c\u7ed3\u6784\u4f53\u8d77\u59cb\u5730\u5740\u4e4b\u95f4\u7684\u504f\u79fb\u91cf<\/p>\n
#include<stdio.h>\/\/\u4e24\u4e2a\u6210\u5458\u5b8c\u5168\u76f8\u540c（\u987a\u5e8f\u4e0d\u540c）\u7684\u7ed3\u6784\u4f53，\u56e0\u4e3a\u5185\u5b58\u5bf9\u9f50\u9020\u6210\u7ed3\u6784\u4f53\u7684\u5185\u5b58\u5927\u5c0f\u4e0d\u540c
\nstruct Std1
\n{
\nchar a;
\nint b;
\nchar c;
\n};
\nstruct Std2
\n{
\nchar a;
\nchar b;
\nint c;
\n};
\nint main()
\n{
\nprintf("%zu\\\\n",sizeof(struct Std1));\/\/12
\nprintf("%zu\\\\n", sizeof(struct Std2));\/\/8
\nreturn 0;
\n} <\/p>\n
\u7ed3\u6784\u4f53\u4f20\u53c2\u5206\u4e3a\u4e24\u79cd\u65b9\u5f0f：<\/p>\n
\u7ed3\u6784\u4f53\u53d8\u91cf\u4f20\u53c2<\/p>\n
#include<stdio.h>
\nstruct Std1
\n{
\nchar a;
\nint arr[20];
\n};
\nvoid my_print(struct Std1 s)
\n{
\ns.a = '7';
\nprintf("%c\\\\n", s.a);
\n}
\nint main()
\n{
\nstruct Std1 s1 = { 0 };
\nmy_print(s1);
\nreturn 0;
\n} <\/p>\n
\u7ed3\u6784\u4f53\u6307\u9488\u4f20\u53c2<\/p>\n
#include<stdio.h>
\nstruct Std1
\n{
\nchar a;
\nint arr[20];
\n};
\nvoid my_print(struct Std1* s)
\n{
\ns->a = '7';
\nprintf("%c\\\\n", s->a);
\n}
\nint main()
\n{
\nstruct Std1 s1 = { 0 };
\nmy_print(&s1);
\nreturn 0;
\n} <\/p>\n
\u4f4d\u6bb5\u7684\u58f0\u660e\u7684\u548c\u7ed3\u6784\u4f53\u7684\u58f0\u660e\u76f8\u4f3c，\u53ea\u6709\u4e24\u70b9\u4e0d\u540c：<\/p>\n
struct Std
\n{
\nint a : 2;
\nint b : 5;
\n}; <\/p>\n
\u8fd9\u5c31\u662f\u4e00\u4e2a\u5b8c\u6574\u4f4d\u6bb5\u7684\u58f0\u660e\u3002<\/p>\n
PS:<\/p>\n
\u8054\u5408\u4f53\u50cf\u7ed3\u6784\u4f53\u4e00\u6837，\u53ef\u7531\u4e00\u4e2a\u6216\u591a\u4e2a\u6210\u5458\u6784\u6210，\u8fd9\u4e9b\u6210\u5458\u53ef\u4ee5\u662f\u4e0d\u540c\u7c7b\u578b，\u4f46\u662f\u7f16\u8bd1\u5668\u53ea\u4e3a\u5360\u5185\u5b58\u6700\u5927\u7684\u6210\u5458\u5206\u914d\u8db3\u591f\u7684\u5185\u5b58\u7a7a\u95f4，\u6240\u6709\u7684\u6210\u5458\u5171\u7528\u4e00\u4e2a\u5185\u5b58\u7a7a\u95f4，\u6240\u4ee5\u8054\u5408\u4f53\u6709\u53e6\u4e00\u4e2a\u540d\u5b57：\u5171\u7528\u4f53\u3002<\/p>\n
\u9664\u4e86\u5173\u952e\u5b57\u6362\u4e3a：union，\u5176\u4f59\u58f0\u660e\u65b9\u5f0f\u4e0e\u7ed3\u6784\u4f53\u4e00\u81f4\u3002<\/p>\n
union Un
\n{
\nint a;
\nchar b;
\n}; <\/p>\n
\u7531\u4e8e\u8054\u5408\u4f53\u7684\u6240\u6709\u6210\u5458\u5171\u7528\u4e00\u5757\u5185\u5b58，\u56e0\u6b64\u540c\u4e00\u65f6\u95f4\u53ea\u80fd\u8c03\u7528\u4e00\u4e2a\u6210\u5458\u3002<\/p>\n
union Un
\n{
\nchar a[5];
\nint b;
\n};
\nint main()
\n{
\nprintf("%zu\\\\n", sizeof(union Un));\/\/\u6700\u5927\u6210\u5458\u5185\u5b58\u4e3a5，\u4f46\u662f\u6700\u6574\u4e2a\u8054\u5408\u4f53\u7684\u5185\u5b58\u4e3a：8
\nreturn 0;
\n} <\/p>\n
union Un
\n{
\nchar a;
\nint b;
\n};
\nint main()\/\/VS\u73af\u5883\u4e0b\u4e3a：\u5c0f\u7aef\u5b58\u50a8
\n{
\nunion Un un;
\nun.b = 1;
\nif (un.a == 0)
\n{
\nprintf("\u5927\u7aef\u5b58\u50a8");
\n}
\nelse
\n{
\nprintf("\u5c0f\u7aef\u5b58\u50a8");
\n}
\nreturn 0;
\n} <\/p>\n
\u628a\u53ef\u80fd\u7684\u503c\u4e00\u4e00\u5217\u4e3e\u3002<\/p>\n
enum SEX
\n{
\nMALE,
\nFEMALE,
\nSECRET
\n}; <\/p>\n
\u5217\u4e3e\u7684\u6bcf\u79cd\u60c5\u51b5\u4e4b\u95f4\u7528\u9017\u53f7\u9694\u5f00，\u82e5\u6ca1\u6709\u7279\u6b8a\u8d4b\u503c，\u7cfb\u7edf\u4f1a\u9ed8\u8ba4\u7ed9\u7b2c\u4e00\u4e2a\u8d4b\u503c\u201c0\u201d，\u540e\u7eed\u7684\u4f9d\u6b21\u52a0\u4e00，\u679a\u4e3e\u7684\u6bcf\u79cd\u60c5\u51b5\u90fd\u6709\u5bf9\u5e94\u7684\u503c\u3002（\u58f0\u660e\u65f6\u53ef\u4ee5\u7ed9\u6bcf\u4e00\u79cd\u60c5\u51b5\u8d4b\u7279\u6b8a\u503c）<\/p>\n
enum SEX sex = MALE;\/\/\u628a\u5176\u4e2d\u4e00\u79cd\u60c5\u51b5\u8d4b\u503c <\/p>\n
\u76ee\u5f55
\n\u7ed3\u6784\u4f53
\n\u533f\u540d\u7ed3\u6784\u4f53
\n\u7ed3\u6784\u4f53\u7684\u81ea\u5f15\u7528
\n\u7ed3\u6784\u4f53\u7684\u5185\u5b58\u5bf9\u9f50
\n\u5bf9\u9f50\u89c4\u5219
\n\u7ed3\u6784\u4f53\u5185\u5b58\u5bf9\u9f50\u7684\u539f\u56e0
\n\u7ed3\u6784\u4f53\u4f20\u53c2
\n\u4f4d\u6bb5
\n\u4f4d\u6bb5\u7684\u58f0\u660e
\n\u4f4d\u6bb5\u5982\u4f55\u5206\u914d\u5185\u5b58
\n\u4f4d\u6bb5\u7684\u4e0d\u786e\u5b9a\u56e0\u7d20
\n\u8054\u5408\u4f53
\n\u8054\u5408\u4f53\u7684\u58f0\u660e
\n\u8054\u5408\u4f53\u7684\u5927\u5c0f
\n\u8054\u5408\u4f53\u7684\u5e94\u7528
\n\u679a\u4e3e
\n\u679a\u4e3e\u7684\u58f0\u660e
\n\u679a\u4e3e\u7684\u4f7f\u7528
\n\u679a\u4e3e\u76f8\u6bd4\u4e8e\u5b8f\u5b9a\u4e49\u201c#define\u201d\u7684\u4f18\u70b9 \u7ed3\u6784\u4f53
\n\u7ed3\u6784\u4f53\u751f\u6d3b\u4e2d\u4e00\u7c7b\u5b9e\u7269\u62bd\u8c61\u51fa\u6765\u7684\u4e00\u4e2a\u5b9a\u4e49，\u7ed3\u6784\u4f53\u7684\u5b9a\u4e49\u548c\u7ed3\u6784\u4f53\u53d8\u91cf\u7684\u521b\u5efa\u4ee5\u53ca\u521d\u59cb\u5316\u5982\u4e0b：
\n#include<\/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":[174,190],"topic":[],"class_list":["post-89875","post","type-post","status-publish","format-standard","hentry","category-server","tag-c","tag-190"],"yoast_head":"\n