Macro-Based Register Config Helper

Code

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

// Define macros here

#define ENABLE(r, value) r=r|(value<<0)

#define MODE(r, value) r=r|(value<<1)

#define SPEED(r, value) r=r|(value<<3)

#define RESERVED(r, value) r=r|(value<<6)

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    uint16_t r=0;
    ENABLE(r, enable);
    MODE(r, mode);
    SPEED(r,speed );
    RESERVED(r, 0);

    return r;

}

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