1 #include <stdio.h>
2
3 union
4 {
5 short s;
6 char c[sizeof(short)];
7 }un;
8
9 int main(int argc, char *argv[])
10 {
11 un.s = 0x0102;
12
13 if(sizeof(short) == 2)
14 {
15 if(un.c[0] == 0x01 && un.c[1] == 0x02)
16 {
17 printf("big-endian\n"); /* 高位存低字节，低位存高字节 */
18 }
19 else if (un.c[0] == 0x02 && un.c[1] == 0x01)
20 {
21 printf("little-endian\n"); /* 低位存低字节，高位存高字节 */
22 }
23 else
24 {
25 printf("Unknow");
26 }
27 }
28 else
29 {
30 printf("sizeof(short) == %d\n", sizeof(short));
31 }
32
33 return 0;
34 }
