题解 | #查找输入整数二进制中1的个数#

#include <iostream>
using namespace std;

int main() {
    int a;
    while (cin >> a) {
        int count = 0;
        for (int i = 0; i < 60; i++) {
            int temp = a % 2;
            if (temp == 1) {
                count ++;
                a -= 1;
            }
            if (temp == 0) {
                a = a / 2;
            }
            if (a == 0) {
                break;
            }
        }
        cout << count << endl;
    }
}