exe11.4.cpp

这是C++的一部分练习程序!对初学者有一定的帮助作用。

#include <iostream.h>
class B
{
  public:
	virtual void fun1()
	{  cout<<"B::fun1().\n";  }
	virtual void fun2()
	{  cout<<"B::fun2().\n";  }
	void fun3()
	{  cout<<"B::fun3().\n";  }
	void fun4()
	{  cout<<"B::fun4().\n";  }
};
class D:public B
{
  public:
	void fun1()
	{  cout<<"D::fun1().\n";  }
	void fun2()
	{  cout<<"D::fun2().\n";  }
	void fun3()
	{  cout<<"D::fun3().\n";  }
	void fun4()
	{  cout<<"D::fun4().\n";  }
};
void main()
{
	B *pb;
	D d;
	pb=&d;
	pb->fun1();
	pb->fun2();
	pb->fun3();
	pb->fun4();
}