计算一个数中二进制1的个数1

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>


int count_one_bits1(unsigned val) {
	int count = 0;
	while (val){
		++count;
		val = val&(val - 1);
	}
	return count;
}

int main() {
	unsigned int n = 0;
	scanf("%u", &n);
	printf("%d\n", count_one_bits1(n));
	system("pause");
	return 0;
}

127
7
请按任意键继续. . .