关于联合的一些介绍

 1 #include <stdio.h>
 2 
 3 typedef union _A{
 4     int i;
 5     char c[2];
 6 }A;
 7 
 8 A g_a; //266
 9 
10 int main(){
11     static A s_a;    // 266
12     A a_a;
13 
14     s_a.c[0] = 10;
15     s_a.c[1] = 1;
16 
17     g_a.c[0] = 10;
18     g_a.c[1] = 1;
19 
20     a_a.c[0] = 10;
21     a_a.c[1] = 1;
22 
23     printf("%d\n", g_a.i);
24     printf("%d\n", s_a.i);
25     printf("%d\n", a_a.i);
26 
27     getchar();
28 
29     return 0;
30 }