Macro-Based Register Config Helper

Code

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

// Define macros here
#define Enable_Bit(n)  1*n
#define Mode_Bit(n)    (1*n)<<1
#define Speed_Bit(n)   (1*n)<<3

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    uint16_t reg=0;
   
        reg = reg | Enable_Bit(enable) | Mode_Bit(mode) | Speed_Bit(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