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

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