Count Set Bits in an Integer

Code

#include <stdio.h>

int countSetBits(unsigned int n) {

    int count=0;
    while(n){
    n&=(n-1);
    count++;
    }

    return count;
}

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

Solving Approach