整数二进制表示中1的个数

#include <iostream>

using namespace std;

int BitOneNumbers(int i);

int main()
{

	int i;
	cin>>i;
	int numbers=BitOneNumbers(i);

	system("pause");
	return 0;
}

int BitOneNumbers(int i)
{
	int counts=0;
	while (i)
	{
		counts++;
		i=i&(i-1);
	}
	return counts;
}