Count Set Bits in an Integer

#include <stdio.h>

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

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