Macro-Based Register Config Helper

Code

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

// Define macros here
#define enable_pos 0
#define mode_pos  1
#define  speed_pos 3

#define Set_Enable(x)        (((x) & 0x1) << enable_pos)
#define Set_Mode(x)        (((x) & 0x3) << mode_pos)
#define Set_Speed(x)        (((x) & 0x7) << speed_pos)
uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
    uint16_t reg=0;
    reg|= Set_Enable(enable);
    reg|= Set_Mode(mode);
    reg|= Set_Speed(speed);
    return reg;
   // return 0;
}

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