Macro-Based Register Config Helper

Code

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

// Define macros here
#define Enable(reg , en) (reg|=en)
#define Mode(reg,mode) ((reg)|= (mode)<<1)
#define Speed(reg,speed) ((reg)|= (speed)<<3)
uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    uint16_t reg = 0;
    Enable(reg,enable);
    Mode(reg,mode);
    Speed(reg,speed);
        return reg;
}

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