第一种方法
#include<stdio.h>int b(int unsigned a){ int count = 0; while (a) { if (a % 2 == 1) { count++; } a = a / 2; } return count;}int main(){ int count = 0; int ret = 0; int a = 0; scanf("%d", &a); ret=b(a); printf("%d",ret); system("pause"); return 0;}
第二种方法
#include<stdio.h>int b(int a){ int count = 0;int n=32; while (n--) { if (a& 1 == 1) { count++; } a = a /》》1; } return count;}int main(){ int count = 0; int ret = 0; int a = 0; scanf("%d", &a); ret=b(a); printf("%d",ret); system("pause"); return 0;}