visualCplusplus学习课件大连东软培训教材

#include "stdafx.h"
#include <iostream.h>

class CBase
{
public:
	CBase(int x,  int y)
	{
		m_nX = x;
		m_nY = y;
	}
	void Display()
	{
		cout << m_nX << "  " << m_nY <<endl;
	}
protected:
	int m_nX;
	int m_nY;
};


class CDerived : public CBase
{
public:
	CDerived(int x, int , int z);
	void Display();
protected:
private:
	int m_nZ;
};

CDerived::CDerived(int x, int y, int z)
:CBase(x, y)
{
	m_nZ = z;
}

void CDerived::Display()
{
	cout << m_nX << "  " << m_nY << "   " << m_nZ <<endl;
}

void main()
{
	CDerived *d = new CDerived(1, 2, 4);
	CBase *b = d;
	b->Display();
	d->Display();
	
};