#include <iostream>
using namespace std;
int Grial(int x,int y)
{
int count = 0;
while(x!=0 || y!=0)
{
if( ((x&0x1) ^ (y&0x1)) )
count++;
x>>=1;
y>>=1;
}
return count;
}
int main()
{
cout<<Grial(2,15)<<endl;
return 0;
}原文：http://blog.csdn.net/liuhuiyan_2014/article/details/45418073