第十三周项目—阅读、修改和运行关于交通工具类的程序(3)

#include <iostream>
using namespace std;
class Vehicle//交通工具
{
public:
virtual  void run()const=0;

};
class Car:public Vehicle //汽车
{
public:
void run()const
{cout<<"run a car. "<<endl;}
};
class Airplane:public Vehicle //飞机
{
public:
void run()const
{cout<<"run a airplane. "<<endl;}
};
int main()
{
cout<<"(a)直接用对象访问成员函数:"<<endl;
//  Vehicle v;
// v.run();
Car car;
Airplane airplane;
car.run();
airplane.run();
cout<<"(b)用指向基类的指针访问成员函数"<<endl;
Vehicle *vp;
vp=&car;
vp->run();
vp=&airplane;
vp->run();
return 0;
}