C语言判断系统数据大/小端存储方式

 1 #include <stdio.h>
 2 int main(void)
 3 {
 4     short int x;
 5     char *arr;
 6     
 7     x = 0x1122;  
 8     arr = (char *)&x;
 9     
10     if(arr[0]==0x22)
11         printf("The compute is little-endian.\n");
12     else if(arr[0]==0x22)
13         printf("The compute is big-endian.\n");
14     getchar();
15     return 0;    
16 }

 1 #include <stdio.h>
 2 
 3 union data
 4 {
 5     int inter;
 6     char ch;    
 7 };
 8 
 9 int main(void)
10 {
11     union data c;
12     c.inter = 1;
13     if(c.ch == 1)
14         printf("The compute is little-endian.\n");
15     else
16         printf("The compute is big-endian,\n");
17         
18     getchar();
19     return 0;    
20 }