Count Set Bits in an Integer

Code

#include <stdio.h>

int countSetBits(unsigned int n) {
    int cnt = 0;
    if(n == 0) return 0;
    while(n != 0){
        if(n & 1){
            cnt++;
        }
        n = (n >> 1);
    }
    return cnt;
}

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

Solving Approach