计算一个二进制数字中数字1的个数

include<stdio.h>
include<stdlib.h>
int count_bit(unsigned int n)//表示无符号
{
	int count = 0;
	while (n)
	{
		if (n % 2 == 1)
		{
			count++;
		}
		n = n / 2;
	}
	return count;
}
//00000000000000000000000000001111
//1+2+4//111
int main()
{
	int n = 0;
	int ret = 0;
	scanf("%d", &n);
	ret = count_bit(n);
	printf("%d", ret);
	system("pause");
	return 0;
}