1的个数

3
4
6
7

1
2
3

 
#include<iostream>
 using namespace std;
 
 int main()
 {
 int n;
 int a;
 int b = 0;
 int c ;
 cin>>n;
 while(n--){
    cin>>a;
    c = 0;
    while(a != 0)
    {
    b = a %2;
    a = a /2;
    if(b ==1)
        c ++;
    }

    cout << c <<endl;
 }
 return 0;
 }