3/9作业

用联合体的方式判断计算机是大端还是小端

#include <stdio.h>
union
{
	int a;
	char c;
}UN;
int main(int argc, const char *argv[])
{
	UN.a=0x87654321;
	if(0x21==UN.c)
	{
		printf("little-endian\n");
	}
	else if(0x87==UN.c)
	{
		printf("big-endian\n");
	}
	return 0;
}