#include<stdio.h>
#include<stdlib.h>
struct bitf
{
    unsigned bit_0:1;
    unsigned dummy:14;
    unsigned bit_15:1;
}*bit_buff;
void main()
{
unsigned short x;char buf[20];
for(;;)
{
      printf("请输入一个整型数字(若想退出请输入0)");
      gets(buf);
      if(buf[0]=='0') break;
      x=(unsigned short)atoi(buf);
      bit_buff=(struct bitf*)&x;
      printf("该数的十六进制是：%0x\n",x);
      printf("该数在本机内表示的最高位是MBS:%d\n",bit_buff->bit_15);
      
      printf("\n");
}

} 输入888  为什么最高位0最低位0
bit_buff=(struct bitf*)&x;
printf("该数在本机内表示的最高位是MBS:%d\n",bit_buff->bit_15);
printf("该数在本机内表示的最低位是LBS:%d",bit_buff->bit_0);
这三步搞不懂    请大家帮忙解释下  

哦  这样啊                谢谢