#include <arpa/inet.h>
#include <stdio.h>




void big_little_endian()
{
    union{
        short s;
        char c[sizeof(short)];
    }un;
    un.s=0x0102;
    if(sizeof(short) == 2)
    {
        if(un.c[0] == 1 && un.c[1] == 2)
            printf("big_endian\n");
        else if(un.c[0] == 2 && un.c[1] ==1)
            printf("little_endian\n");
        else
        {
            printf("unknown\n");
        }
        
    }
}


void main()
{
    big_little_endian();
}