a_9_1.cpp

C++应用教程原码,里面包含该书中有十三章内容的代码,详细具体

#include "stdafx.h"
#include <iostream>
#include <string>
using namespace std;
class A {
public:
	virtual void fun()
	{cout << "调用了类A中的虚函数"<<endl;}
};
class B:public A {
public:
	virtual void fun()
	{cout << "调用了类B中的虚函数"<<endl;}
};
class C:public B {
public:
	virtual void fun()
	{cout << "调用了类C中的虚函数"<<endl;}
};
void main()
{ B b;
  A *a1 = &b;
  A &a2 = b;
  A *a3 = new A;
  A *a4 = new C;
  a1->fun();
  a2.fun();
  a2.A::fun();
  a3->fun(); 
  a4->fun(); 
  b.fun();
  b.A::fun();
  b.B::fun();
  cin.get(); //等待结束，以便调测程序，可以删除
}