//console.h
#include <iostream>

class Keyboard {
public:
    Keyboard() { std::cout << "Keyboard input initialized\n";}
    virtual ~Keyboard() { std::cout << "Keyboard input uninitialized\n";}
    void inputInstruction();
protected:
    std::string currentInstruction;
};

class Screen {
public:
    Screen() {std::cout << "Screen output initilized\n";}
    virtual ~Screen() {std::cout << "Screen output unitialized\n"; }
    void output(std::string outputLine);
    void setBackgroundColor(std::string color);
protected:
    std::string backgroundColor;
};

class Console : public Screen, public Keyboard {
public:
    Console();
    virtual ~Console() { }
    void executeInstruction();
protected:
private:
};

//console.cpp

#include "console.h"

Console::Console() :
    Screen(), Keyboard() {
    std::cout << "Instructions:\n-setBackgroundColor <color>\n-shutdown\n"
              << "---------------------------\n> ";
}

void Keyboard::inputInstruction() {
    std::cin >> currentInstruction;
}

void Screen::output(std::string outputLine) {
    std::cout << outputLine;
}

void Screen::setBackgroundColor(std::string color) {
    output("Switched background color to " + color + "\n");
}

void Console::executeInstruction() {
    do {
        inputInstruction();
        if(currentInstruction == "setBackgroundColor") {
            std::cin >> currentInstruction;
            setBackgroundColor(currentInstruction);
        }
        output("> ");
    } while(currentInstruction != "shutdown");
}

//main.cpp
#include <iostream>
#include "console.h"

int main() {
    Console *console = new Console();
    console->executeInstruction();
    delete console;
    return 0;
}