某软件公司现欲开发一款飞机飞行模拟系统，该系统主要模拟不同种类飞机的飞行特征与起飞特征。需要模拟的飞机种类及其特征如表5-1所示。

#include <iostream>
#include <string>
using namespace std;

class FlyBehavior
{
public: 
    virtual void fly31()=0;
};
class SubSonicFly:public FlyBehavior
{
public:
    void fly31()
    {cout<<"亚音速飞行"<<endl;}
};
class SuperSonicFly:public FlyBehavior
{
public:
    void fly31()
    {cout<<"超音速飞行"<<endl;}
};

class TakeOffBehavior
{
public:
    virtual void takeoff31()=0;
};
class VerticalTakeOff:public TakeOffBehavior
{
public:
    void takeoff31()
    {cout<<"垂直起飞"<<endl;}
};
class LongDistanceTakeOff:public TakeOffBehavior
{
public:
    void takeoff31()
    {cout<<"长距离起飞"<<endl;}
};

class AirCraft
{
protected:
    FlyBehavior *flyBehavior;
    TakeOffBehavior *takeOffBehavior;
public:
    void fly31()
    {flyBehavior->fly31();}
    void takeoff31()
    {takeOffBehavior->takeoff31();}
};
class Helicopter:public AirCraft
{
public:
    Helicopter()
    {
        flyBehavior=new SubSonicFly();
        takeOffBehavior=new VerticalTakeOff();
    }
    ~Helicopter()
    {
        if(!flyBehavior)
            delete flyBehavior;
        if(!takeOffBehavior)
            delete takeOffBehavior;
    }
};

int main()
{
    Helicopter *x=new Helicopter();
    x->fly31();
    x->takeoff31();
    return 0;
}

运行结果：

ｊａｖａ　代码实现：

interface FlyBehavior
{
public void fly31();
}
class SubSonicFly implements FlyBehavior
{
public void fly31()
{System.out.println("亚音速飞行");}
}
class SuperSonicFly implements FlyBehavior
{
public void fly31()
{System.out.println("超音速飞行");}
}

interface TakeOffBehavior
{
public void takeoff31();
}
class VerticalTakeOff implements TakeOffBehavior
{
public void takeoff31()
{System.out.println("垂直起飞");}
}
class LongDistanceTakeOff implements TakeOffBehavior
{
public void takeoff31()
{System.out.println("长距离起飞");}
}

class AirCraft
{
protected FlyBehavior flyBehavior;
protected TakeOffBehavior takeOffBehavior;
public void fly31()
{flyBehavior.fly31();}
public void takeoff31()
{takeOffBehavior.takeoff31();}
}
class Helicopter extends AirCraft
{
    public Helicopter()
    {
        flyBehavior=new SubSonicFly();
        takeOffBehavior=new VerticalTakeOff();
    }
}

public class dev
{
    public static void main(String [] args)
    {
        Helicopter x=new Helicopter();
        x.fly31();
        x.takeoff31();
    }
}