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 reg;
    }
    int i = 0;
    int count = 0;
    while (i<8){
        if(((reg >> i) & 1) == 1){
            count++;
        }
        i++;
    }
    return count;
}

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