30. Count Set Bits in an Integer

#include <stdio.h>

int countSetBits(unsigned int n) {
    int count = 0;
    int bits = 0;
    unsigned int temp = n;
    while (n > 0) {
        bits++;
        n >>= 1;  // Divide by 2
    }
    
    for(int i = 0; i < bits; i++)
    {
        if(temp & (1 << i)){
            count++;
        }
    }
    return count;
}

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