//Listing 14.10 Pointers to member functions using virtual methods

#include <iostream>
using namespace std;

class Mammal
{
public:
	Mammal():itsAge(1) { }
	~Mammal() { }
	virtual void speak() const = 0;
	virtual void move() const = 0;
protected:
	int itsAge;
};

class Dog : public Mammal
{
public:
	void speak()const { cout << "Woof!\n"; }
	void move() const { cout << "Walking to heel...\n"; }
};


class Cat : public Mammal
{
public:
	void speak() const { cout << "Meow!\n"; }
	void move() const { cout << "slinking...\n"; }
};


class Horse : public Mammal
{
public:
	void speak()const { cout << "Winnie!\n"; }
	void move() const { cout << "Galloping...\n"; }
};


int main()
{
	void (Mammal::*pFunc)() const = 0;
	Mammal* ptr = 0;
	int animal;
	int method;
	bool fQuit = false;

	while (!fQuit)
	{
		cout << "(0)Quit (1)dog (2)cat (3)horse: ";
		cin >> animal;

		switch (animal)
		{
		case 1: 
			ptr = new Dog; 
			break;
		case 2: 
			ptr = new Cat; 
			break;
		case 3: 
			ptr = new Horse; 
			break;
		default: 
			fQuit = true; 
			break;
		}

		if (fQuit)
		{
			break;
		}

		cout << "(1)speak (2)move: ";
		cin >> method;

		switch (method)
		{
		case 1: 
			pFunc = &Mammal::speak; 
			break;
		default: 
			pFunc = &Mammal::move; 
			break;
		}

		(ptr->*pFunc)();
		delete ptr;
	}

	return 0;
}