Macro-Based Register Config Helper

Code

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

// Define macros here
#define ENABLE_BIT_OFFSET (0)
#define MODE_BIT_OFFSET   (1)
#define SPEED_BIT_OFFSET  (3)

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    uint16_t result = 0;
    result = ((enable & 0x1) << ENABLE_BIT_OFFSET) | ((mode & 0x3) << MODE_BIT_OFFSET) | ((speed & 0x7) << SPEED_BIT_OFFSET);
    return result;
}

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