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

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