Macro-Based Register Config Helper

Code

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

// Define macros here
#define ENABEL_SHIFT 0
#define MODE_SHIFT  1
#define SPEED_SHIFT 3

#define ENABLE(b)   (((b)& 0x1) << ENABEL_SHIFT)
#define MODE(b)     (((b)& 0x3) << MODE_SHIFT)
#define SPEED(b)    (((b)& 0x7) << SPEED_SHIFT)

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    return ENABLE(enable)|MODE(mode)|SPEED(speed);
   // return 0;
}

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