题解 | #查找输入整数二进制中1的个数#

#include <iostream>
using namespace std;

int main() {
    int num;
    while (cin >> num) {
        int res = 0;
        while (num){
            if ((num & 1) == 1){
                ++res;
            }
            num /= 2;
        } 
        cout << res << endl;
    }
    return 0;
}