判断PC机大小端

 1 #include<stdio.h>
 2 #include<stdlib.h>
 3 
 4 int main()
 5 {
 6     short a = 0x0102;
 7     char *p = (char*)(&a);
 8 
 9     //低字节存储在低地址
10     if(*p == 2 && *(p + 1) == 1)
11         printf("小端\n");
12 
13     //高字节存储在低地址
14     else if(*p == 1 && *(p + 1) == 2)
15         printf("大端\n");
16 
17     return 0;
18 }