Count Set Bits in an Integer

#include <stdio.h>

int countSetBits(unsigned int n) {
    // Write your code here
    int out = 0;
    while(n!=0){
        out = (n&1)? out+1 : out;
        n>>=1;
    }

    return out;
}

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