Pack Multiple Fields into a 16-bit Control Register

Code

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

#define mode_position 0
#define speed_position 3
#define reserved_position 8
#define status_positon 10

#define mode_bit 0x07
#define speed_bit 0x1F
#define reserved_bit 0x03
#define status_bit 0x3F


uint16_t pack_register(uint8_t mode, uint8_t speed, uint8_t status) {
    // Your logic here
    uint16_t pack_bit = 0x00;
    pack_bit  = pack_bit | (((mode & mode_bit) << mode_position) | ((speed & speed_bit) << speed_position) | ((status & status_bit) << status_positon));
    pack_bit &= ~(reserved_bit << reserved_position);
    return pack_bit;
}

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