7月19日

休息一天，随便写写，但还是坚持发

#define _CRT_SECURE_NO_WARNINGS 1
#include <string.h>
#include <stdio.h>




int main()
{
	int a, b, c;

	a = 5;
	c = ++a;
	b = ++c, c++, ++a, a++;
	b += a++ + c;
	printf("a = %d b = %d c = %d\n", a, b, c);
	return 0;
}








//int count_num_1(int n)//不适用负数
int count_num_1(unsigned int n)//无符号数
{
	int count = 0;
	while (n)
	{
		if ((n % 2) == 1)
		{
			count++;
		}
	    n /= 2;
	}
	return count;
}



int count_num_1(int n)
{
	int i = 0;
	int count = 0;
	for (i = 0; i < 32; i++)
	{
		if ((n >> 1)&1 == 1)
		{
			count++;
		}
	}
	return count;
}


int count_num_1(int n)
{
	int count = 0;
	while (n)
	{
		n = n & (n - 1);
		count++;
	}
	return count;
}

int main()
{
	int num = 0;
	scanf("%d", &num);
	int n = count_num_1(num);
	printf("%d\n", n);

	return 0;
}