bitCounter.cpp

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

int bits(int x){
        if(!x) return x;
        return (x&1)+bits(x>>1);
}

int main(int argc, char const* argv[])
{
        int x = atoi(argv[1]);
        cout << bits(x) <<endl;
        return 0;
}