Macro-Based Register Config Helper

Code

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

// Define macros here

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    uint16_t reg = 0;
    if (enable == 1) {
        reg |= (1 << 0);
    }
    for (int i=0; i < 2; i++) {
        if (mode & (1 << i)) {
            reg |= (1 << i+1);
        }
    }
    for (int i=0; i < 3; i++) {
        if (speed & (1 << i)) {
            reg |= (1 << i+3);
        }
    }
    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