6.3 交通工具类

#include <iostream>

using namespace std;

class Vehicle //交通工具

{

public:

void run() const

{ cout << "run a vehicle. "<<endl; }

};

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;

}