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
    if(reg == 0){
        return 0;
    }
    uint8_t count = 0;
    while(reg !=0){
          if(reg & 0x01){
            count += 1;
        }

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

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