Macro-Based Register Config Helper

Code

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

// Define macros here
#define set_ENABLE(x)  (((x)&0x1)<<0)
#define SET_MODE(x)  (((x)&0x3)<<1)
#define SET_SPEED(x)  (((x)&0x7)<<3)
uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set field
    uint16_t res;
    res|=set_ENABLE(enable);
    res|=SET_MODE(mode);
    res|=SET_SPEED(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