Macro-Based Register Config Helper

Code

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

// Define macros here
#define ENABLE_BIT(x,enable) (x|(enable));
#define mode_bit(x,n) (x|(mode)<<1);
#define speed_bit(x,n) (x|(speed)<<3);
uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    uint16_t reg;

    reg = ENABLE_BIT(reg,enable);
    reg = mode_bit(reg,mode);
    reg = speed_bit(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