//start//
#include <iostream>
#include <string>

using namespace std;

class IPay
{
private:

public:

	virtual void input_money(int a) = 0;

	virtual void print_receipt() = 0;

};

class CashPay //: public IPay
{
private:

	int money_recieved;

public:

	CashPay() {};

	void input_money(int a) //override
	{
		this->money_recieved = a;

	}

	void print_receipt() //override
	{
		cout << "You paid " << this->money_recieved << " bucks in cash!" << endl;
	}
};

class CardPay //: public IPay
{
private:

	int money_recieved;

public:

	CardPay() {};

	void input_money(int a) //override
	{
		this->money_recieved = a;
	}

	void print_receipt() //override
	{
		cout << "\nProcessing...\n" << endl;
		cout << "You paid " << this->money_recieved << " bucks by card!" << endl;
	}
};

// context object
class PaymentPoint
{
private:
	IPay * payment_method;

public:

	PaymentPoint() {};

	void set_payment_method(IPay *payment_method)
	{
		this->payment_method = payment_method;
	}

	void pay(int a)
	{
		payment_method->input_money(a);

		payment_method->print_receipt();
	}
};


int main()
{
	PaymentPoint payment_point;
	CashPay *cash_pay = new CashPay();
	CardPay card_pay();

	CardPay *card_pay1 = new CardPay();

	string payment_method;
	cout << "Enter payment method: ";
	cin >> payment_method;

	if (payment_method == "cash")
	{
		payment_point.set_payment_method(cash_pay);
		payment_point.pay(150);
	}
	else if (payment_method == "card")
	{
		payment_point.set_payment_method(card_pay1);
		payment_point.pay(1337);
	}

	system("pause");
}