#include <stdio.h>int is_little_endian(void){	unsigned short flag=0x4321;	if(*(unsigned char*)&flag==0x21)		return 1;	else		return 0;}int main(void){	union endian_un{		short var;		char bits[sizeof(short)];	};	union endian_un flag;	flag.var=0x0102;	if(sizeof(short)==2){		if(flag.bits[0]==1 && flag.bits[1]==2)			printf("judged by first method, big-endian\n");		else if(flag.bits[0]==2 && flag.bits[1]==1)			printf("judged by first method, little-endian\n");		else			printf("cannot determine the type\n");	}	if(is_little_endian())		printf("judged by second method, little-endian\n");	else		printf("judged by second method, big-endian\n");	return 0;}