Bit Reversal in an 8-bit Value

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

uint8_t reverse_bits(uint8_t val) {
    // Your logic here
    // 1. using loops (naive)
    // 2. using look up table for of already
    // computed values for all 8-bit val
    // 3. as below
    val = ((val & 0XAA) >> 1) | ((val & 0x55) << 1);
    val = ((val & 0XCC) >> 2) | ((val & 0x33) << 2);
    val = ((val & 0xF0) >> 4) | ((val & 0x0F) << 4);
    return val;
}

int main() {
    uint8_t val;
    scanf("%hhu", &val);

    uint8_t result = reverse_bits(val);
    printf("%u", result);
    return 0;
}