Macro-Based Register Config Helper

Code

#include <stdio.h>
#include <stdint.h>
// Define macros here
#define ENABLE(n) (n<<0)
#define MODE(n) (n<<1)
#define SPEED(n) (n<<3)

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) 
{
    uint16_t val=0;
    val |= ENABLE(enable);
    val |= MODE(mode);
    val |= SPEED(speed);
    return val;
}

int main() {
    uint8_t enable, mode, speed;
    scanf("%hhu %hhu %hhu", &enable, &mode, &speed);

    uint16_t reg = build_register(enable, mode, speed);
    printf("%u", reg);
    return 0;
}

Solving Approach