Macro-Based Register Config Helper

Code

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

// Define macros here
#define ENABLE_BIT      0
#define MODE_BIT        1
#define SPEED_BIT       3
#define RESERVED_BIT    6

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    uint16_t retVal = 0;
    
    retVal |= (enable << ENABLE_BIT);
    retVal |= (mode << MODE_BIT);
    retVal |= (speed << SPEED_BIT);
    
    return retVal;
}

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