Macro-Based Register Config Helper

Code

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

// Define macros here
#define enable_bit(res) (res|(0x0001))
#define set_mode(res,mode) (res| (mode<<1))
#define set_speed(res,speed) (res|(speed<<3))

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    uint16_t res = 0;
    if(enable==1)
        res = enable_bit(res);
    res = set_mode(res,mode);
    res= set_speed(res,speed);
    return res;

}

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