30. Count Set Bits in an Integer

#include <stdio.h>

int countSetBits(unsigned int n) {
    // Write your code here
    int num = 0 ;
    while(n / 2 != 0)
    {
        if(n % 2 == 1)
        {
            num++;
        }
        n = n / 2 ;
    }
    if(n % 2 == 1)
    {
        num++;
    }
    return num;
}

int main() {
    int n;
    scanf("%d", &n);
    printf("%d", countSetBits(n));
    return 0;
}