#include <stdio.h>
unsigned int getbits(unsigned int value)/*补码函数*/
{
 unsigned int z;
 z=value&0x100000;
 if(z==0x0100000)
  z=~value+1;
 else
  z=value;
 return z;
}
void main()
{
 unsigned int a;
    unsigned int getbits();
 printf("请输入一个八进制数: ");
 scanf("%o",&a);
 printf("它的补码是: %o\n",getbits(a));
}

z=value&0x100000;这句话是什么意思啊?小弟不懂,请高人指点一下!谢谢了