测试目标机的字节序

#include<stdio.h>
#include<arpa/inet.h>
int main()
{
        short a=htons(0x0102);
        short *p=&a;
        if(*((char *)p)==0x01)
                printf("big-endian
");
        else
                if(*((char *)p)==0x02)
                        printf("little-endian
");
                else
                        printf("unknown
");
        return 0;
}