30. Count Set Bits in an Integer

#include <stdio.h>

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

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