题解 | 求int型正整数在内存中存储时1的个数

#include <iostream>
using namespace std;

int main() {
    int n;
    cin >> n;
    int count;
    while(n) {
        if(n % 2) {
            ++count;
        }
        n /= 2;
    }
    cout << count << endl;
    return 0;
}