Count Set Bits in an Integer

Code

#include <stdio.h>

int countSetBits(unsigned int n) {
    int countSetBits = 0;
    while (n != 0){
        n &= (n - 1);
        countSetBits++;
    }

    return countSetBits;
}

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

Solving Approach