#include <iostream>
#include <string>

using namespace std;

class Document
{
public:
	virtual ~Document() { }
	virtual string text() const = 0;
	virtual void edit() = 0;
};

class Document;
class Editor
{
public:
	Editor() { }

	void edit(Document* D)
	{
		cout << D->text() << endl;
		D->edit();
		cout << D->text() << endl;
	}
};

class RealDocument : public Document
{
public:
	RealDocument(string t): Text(t) {
	}

	string text() const { return Text; }
	void edit() { Text = "Gewijzigd"; }
private:
	string Text;
};

class Document;
class DocumentProxy : public Document
{
public:
	DocumentProxy(Document *D, string p): RD(D), password(p)
	{

	}

	virtual string text() const {
		return RD->text();
	}

	virtual void edit() {
		string p;
		cout << "Password: ";
		cin >> p;

		if (p == password) RD->edit();
		else cout << "Geen toegang!" << endl;
	}
private:
	Document * RD;
	string password;
};

int main(void)
{
	do {
		RealDocument *RD = new RealDocument("eerste text");
		DocumentProxy *DP = new DocumentProxy(RD, "geheim");

		Editor *E = new Editor();
		E->edit(DP);

		cin.get();
		cin.get();
	} while(true);

	return 0;
}