test.txt

visualCplusplus学习课件大连东软培训教材

#include "stdafx.h"
#include <iostream.h>
#include <string.h>
class CDraw
{
public:
	virtual char* GetMe() = 0;
protected:
	int m_nX;
	int m_nY;
};


class CCircle : public CDraw
{
public:
	friend void Test(CDraw* p);
	char* GetMe()
	{
		return "circle";
	}
protected:
private:
	int m_nA;
};

class CRect : public CDraw
{
public:
	friend void Test(CDraw* p);
	char* GetMe()
	{
		return "rect";
	}
private:
	int z;
};

void Test (CDraw* p)
{
	if (strcmp(p->GetMe(), "rect") == 0)
	{
		CRect* p1 = (CRect*)p;
		p1->z = 9;
	}
	if (strcmp(p->GetMe(), "circle") == 0)
	{
		CCircle* p1 = (CCircle*)p;
		p1->m_nA = 8;
	}

	
}

void main()
{
	CRect *p = new CRect();

	Test(p);
	CCircle *p1 = new CCircle();
	Test(p1);
};