Count Set Bits in an Integer

#include <stdio.h>

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

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