template design pattern c++

TemplateDesignPattern.cpp

#include <iostream>
using namespace std;

// Base class
// Template class
class Account {
  public:
	// Abstract Methods
	virtual ~Account();

	virtual void Start() = 0;

	virtual void Allow() = 0;

	virtual void End() = 0;

	virtual int MaxLimit() = 0;

	// Template Method
	void Withdraw(int amount)
	{

	Start();

	int limit = MaxLimit();
	if (amount < limit) {
		Allow();
	}
	else {
		cout << "Not allowed" << endl;
	}

	End();
	}
};
Account::~Account() {}

// Derived class
class AccountNormal : public Account {
  public:
	~AccountNormal();
	void Start();

	void Allow();

	void End();

	int MaxLimit();
};

AccountNormal::~AccountNormal() {}

void AccountNormal::Start() { cout << "Start ..." << endl; }

void AccountNormal::Allow() { cout << "Allow ..." << endl; }

void AccountNormal::End() { cout << "End ..." << endl; }

int AccountNormal::MaxLimit() { return 1000; }

// Derived class
class AccountPower : public Account {
  public:
	~AccountPower();
	void Start();

	void Allow();

	void End();

	int MaxLimit();
};

AccountPower::~AccountPower() {}

void AccountPower::Start() { cout << "Start ..." << endl; }

void AccountPower::Allow() { cout << "Allow ..." << endl; }

void AccountPower::End() { cout << "End ..." << endl; }

int AccountPower::MaxLimit() { return 5000; }

int main()
{
	AccountPower power;
	power.Withdraw(1500);

	AccountNormal normal;
	normal.Withdraw(1500);
	return 0;
}