题解 | #查找输入整数二进制中1的个数#

#include <iostream>
#include <vector>
using namespace std;

int main(){
    int n;
    int cnt = 0;
    vector<int> vec;
    while(cin >> n){
       cnt = 0;
        vec.clear();
       while(n > 0){
            vec.push_back(n % 2);
            n /= 2;
       }
        for(int i = 0; i<vec.size(); i++){
            if(vec[i] == 1){
                cnt++;
            }
        }
        cout << cnt << endl;
    }

   
   
}