Pack Multiple Fields into a 16-bit Control Register

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


#define MODE_POS 0
#define SPEED_POS 3
#define STATUS_POS 10

#define MODE_MASK 0x07
#define SPEED_MASK 0x1F
#define STATUS_MASK 0x3F

#define MODE(X)  (uint16_t)((X & MODE_MASK) << MODE_POS )
#define SPEED(X) (uint16_t)((X & SPEED_MASK) << SPEED_POS)
#define STATUS(X) (uint16_t)((X & STATUS_MASK) << STATUS_POS)

uint16_t pack_register(uint8_t mode, uint8_t speed, uint8_t status) {
    // Your logic here
    uint16_t result =0;
    result |= (MODE(mode) | SPEED(speed) | STATUS(status)) ;
    return result;
    
}

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;
}