30. Count Set Bits in an Integer

#include <stdio.h>
int count=0;
int countSetBits(unsigned int n) {
while(n){

count+=n&1;
n=n>>1;
}
return count;
}

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