exam1.cpp

来自「C++语言程序设计题典」· C++ 代码 · 共 28 行

#include <iostream.h>
class A
{
public:
	virtual void disp() { cout << "class A" << endl; }
};
class B:public A
{
public:
	void disp() { cout << "class B" << endl; }
};
class C:public A
{
public:
	void disp() { cout << "class C" << endl; }
};
void cdisp(A *p)
{
	p->disp();
}
void main()
{
	B b;
	C c;
	cdisp(&b);
	cdisp(&c);
}