demo.cpp

零基础学Visual.C....教案PPT.随书光盘-452M.zip

#include <iostream.h>
class Person//基类
{
	public:
		virtual void Show()
		{
			cout<<"A Person"<<endl;
		}
};
class Student:public Person//派生类
{
	public:
		virtual void Show()
		{
			cout<<"A Student"<<endl;
		}
};
void main()//主函数
{
	Person per,*ps;
	Student stu;
	ps=&per;			//指向基类的对象
	ps->Show();
	ps=&stu;			//指向派生类的对象
	ps->Show();
}