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 result = 0;
    result |= (mode & ((1 << 3) - 1));
    result |= ((speed & ((1 << 5) - 1)) << 3);
    result &= ~(((1 << 2) - 1) << 8);
    result |= ((status & ((1 << 6) - 1)) << 10);
    
    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;
}