Pack Multiple Fields into a 16-bit Control Register

#include <stdio.h>
#include <stdint.h>
#define MODE(x) x 
#define SPEED(x) x<<3  
#define STATUS(x) x<<10 

uint16_t pack_register(uint8_t mode, uint8_t speed, uint8_t status) {
    // Your logic here
    uint16_t val = MODE(mode) | SPEED(speed) | STATUS(status);
    return val;
}

int main() {
    uint8_t mode, speed, status;
    scanf("%hhu %hhu %hhu", &mode, &speed, &status);

    uint16_t reg = pack_register(mode, speed, status);
    printf("%u", reg);
    return 0;
}