Macro-Based Register Config Helper

Code

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

#define en 0
#define mo 1
#define sp 3

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    uint16_t reg=0;
    reg|=(enable<<en);
    reg|=(mode<<mo);
    reg|=(speed<<sp);
    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