34. Count Set Bits in an 8-bit Register

#include <stdio.h>
#include <stdint.h>

uint8_t count_set_bits(uint8_t reg) 
{
    // Your code here
    uint8_t count = 0; 
    while(reg > 0)
    {
    if( reg & (0x01))
    {
        count ++; 
    } 

    reg = reg >>  1;
    }
    return count;
}

int main() {
    uint8_t reg;
    scanf("%hhu", &reg);
    printf("%u", count_set_bits(reg));
    return 0;
}