30. Count Set Bits in an Integer

#include <stdio.h>
int countSetBits(unsigned int n) {
    int count=0;
    while(n>0){
        count+=n%2;
        n = n/2;
    }
    return count;
}

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