Count Set Bits in an Integer

Code

#include <stdio.h>

#define check_bit(n, k) ((1 << k) & n)

int countSetBits(unsigned int n) {
    // Write your code here
    int count = 0;
    int i = 0;
    while(n!=0)
    {
        if(check_bit(n, 0))
        {
            count++;
        }
        n>>=1;
    }
    return count;
}

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

Solving Approach