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#include <stdio.h>#include <time.h>#include <stdlib.h>#include <string.h>union Aiyou{ int a; char b; double c;};int main() { printf("共用体大小：%d\n", sizeof(union Aiyou)); union Aiyou ay; printf("a的地址：%p\nb的地址：%p\nc的地址：%p\n", &ay.a, &ay.b, &ay.c); system("pause"); return 0;}

#include <stdio.h>#include <time.h>#include <stdlib.h>#include <string.h>enum Aiyou{ a,b,c,d=10,e,f};int main() { printf("共用体大小：%d\n", sizeof(enum Aiyou));  enum Aiyou ay; int x = 0; if (x==a) { printf("a\n"); } int y = 11;  if (y==e) { printf("e\n"); } system("pause"); return 0;}

#include <stdio.h>#include <time.h>#include <stdlib.h>#include <string.h>typedef struct Aiyou sa;struct Aiyou{ int year; char* name; char* zdg;};//声明一个函数setaiyou，参数是一个指针void setaiyou(struct Aiyou aayy){ printf("专辑名称：%s,主打歌：%s,发行时间：%d\n", aayy.name, aayy.zdg, aayy.year);}int main() { sa ay; ay.year = 2016; ay.name = "周杰伦的床边故事"; ay.zdg = "告白气球"; printf("专辑名称：%s,主打歌：%s,发行时间：%d\n", ay.name, ay.zdg, ay.year); //调用该函数，将ay对象传递过去 setaiyou(ay); system("pause"); return 0;}