25. Pack Multiple Fields into a 16-bit Control Register

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

uint16_t pack_register(uint8_t mode, uint8_t speed, uint8_t status) {
    // Your logic here
    uint16_t bit_mask = 0 ;
    uint16_t pack_reg = 0 ;
    bit_mask = mode ; 
    pack_reg |= bit_mask;
    bit_mask = speed;
    pack_reg |= (bit_mask << 3);
    bit_mask  = 3;
    bit_mask = bit_mask << 8;
    pack_reg &=(~bit_mask);
    bit_mask = status ; 
    pack_reg |= (bit_mask<<10);
    return pack_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;
}