30. Count Set Bits in an Integer

#include <stdio.h>

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

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