#ifndef DEVICE_H
#define DEVICE_H
#include <iostream>
#include <fstream>
using namespace std;

class Device {
public:
    virtual bool test();
    virtual unsigned char read();
    virtual void write(unsigned char value);
    virtual ~Device() = default;
};

class InputDevice : public Device {
    istream* input;
public:
    InputDevice(istream& in);
    unsigned char read() override;
};

class OutputDevice : public Device {
    ostream* output;
public:
    OutputDevice(ostream& out);
    void write(unsigned char value) override;
};

class FileDevice : public Device {
    fstream file;
public:
    FileDevice(string& filename);
    bool test() override;
    unsigned char read() override;
    void write(unsigned char value) override;
};
#endif // DEVICE_H