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;
    for(int i=0; i<16;i++){
        if(mode & (1<<i)){
            result |= (1<<i);
        }
        if(speed & (1<<i)){
            result |= (1<<(i+3));
        }
        if(status & (1<<i)){
            result |= (1<<(i+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;
}