Count Set Bits in an Integer

#include <stdio.h>

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

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