Program to find the number of 1's bit in a number

#include<bits/stdc++.h>

using namespace std;

// this is the program to find the number of 1's bit in a number

int count1nsBit(int n)

{

    int count=0;

    while (n)

    {

        n= n & n-1;

        count++;

    }

    return count;

}

int main()

{

    int n;

    cin>>n;

    cout<<count1nsBit(n);

    return 0;

}

/*

input an output tast are comments

*/