Macro-Based Register Config Helper

Code

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

// Define macros here
//
#define ENABLE(y) ((y&0x01)<<0)
#define MODE(y) ((y&0x03)<<1)
#define SPEED(y) ((y&0x07)<<3)
uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    // Use macros to set fields
        uint8_t reg;
            reg|=ENABLE(enable);
                reg|=MODE(mode);
                    reg|=SPEED(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