#virtual_function #OOP

virtualFunc.cpp

//============================================================================
// Name        : virtualFunc.cpp
// Author      : octoberwu
// Version     :
// Copyright   : Your copyright notice
// Description : Hello World in C++, Ansi-style
//============================================================================

#include <iostream>
using namespace std;

class A
{
public:
	A(){ pa = new char[1]; cout << "new A" << endl;};
	virtual ~A(){delete[] pa; cout << "delete A" << endl;};

	virtual void f(){ cout << "A::f()" << endl;};
	void g(){ cout << "A::g()" << endl;};

private:
	char* pa;
};

class B : public A
{
public:
	B(){ pb = new char[1]; cout << "new B" << endl;}
	~B(){delete[] pb; cout << "delete B" << endl;}

	void f(){ cout << "B::f()" << endl;};
	void g(){ cout << "B::g()" << endl;};
private:
	char* pb;
};


int main() {
	cout << "!!!Hello World!!!" << endl; // prints !!!Hello World!!!

/*
	A Apple;
	A.g();

	B Baby;
	Baby.f();
	Baby.g();
*/
/*
	A* p_a = new B;
	p_a->f();
	p_a->g();
	delete p_a;
*/

	B* p_b = new B;
	p_b->f();
	p_b->g();
	delete p_b;


	return 0;
}