Pack Multiple Fields into a 16-bit Control Register

Code

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

#define MODE_POS	0
#define SPEED_POS	3
#define RSVD_POS	8
#define RSVD_BIT	0
#define STAT_POS	10

uint16_t pack_register(uint8_t mode, uint8_t speed, uint8_t status) {
    // Your logic here
    uint16_t reg = 0;

    reg |= ((mode << MODE_POS) | (speed << SPEED_POS) | 
            (RSVD_BIT << RSVD_BIT) | (status << STAT_POS));

    return reg;
}

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;
}

Solving Approach