30. Count Set Bits in an Integer

#include <stdio.h>


int countSetBits(unsigned int n) {
    int count;
    for(int i=0;i<(sizeof(int))*8;i++)if((n>>i)&1)count++;
    return count;
}

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