Macro-Based Register Config Helper

Code

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

#define build_register(enable,mode,speed)(\
        (reg) =0,\
        (reg) |= enable<<0,\
        (reg) |= mode<<1,\
        (reg) |= speed<<3,\
        (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