#include <iostream>
using namespace std;class MyCar1
{
public:virtual void installEngine() = 0;
};class BMW5 : public MyCar1
{
public:virtual void installEngine(){cout << "BMW5 3500CC" << endl;}
};class BMW6 : public MyCar1
{
public:virtual void installEngine(){cout << "BMW6 4000CC" << endl;}
};class Jeep11 : public MyCar1
{
public:virtual void installEngine(){cout << "Jeep11 1100CC" << endl;}
};class Jeep12 : public MyCar1
{
public:virtual void installEngine(){cout << "Jeep12 1200CC" << endl;}
};//不同的车型，不同型号，安装不同类型的发动机，会引起子类的泛滥
//问题引出
void main1601()
{Jeep12 *j12 = new Jeep12;j12->installEngine();delete j12;return ;
}class MyCar2
{public:virtual void installEngine3500() = 0;virtual void installEngine4000() = 0;virtual void installEngine1100() = 0;virtual void installEngine1200() = 0;
};class BMW : public MyCar2
{
public:virtual void installEngine3500(){cout << "3500CC" << endl;}virtual void installEngine4000(){cout << "4000CC" << endl;}virtual void installEngine1100() {cout << "1100CC" << endl;}virtual void installEngine1200(){cout << "1200CC" << endl;}
};//这样的设计 不符合开闭原则
void main1602()
{BMW *bmw5 = new BMW;bmw5->installEngine3500();
}//需要把“安装发动机”这个事，做很好的分解；把抽象 和 行为实现 分开
//发动机是一个名次，专门抽象成一个类；类中含有一个成员函数，安装发动机class Engine
{
public:virtual void installEngine() = 0;
};class Engine4000 : public Engine
{
public:virtual void installEngine(){cout << "安装发动机 Engine4000" << endl;}
};class Engine3500 : public Engine
{
public:virtual void installEngine(){cout << "安装发动机 Engine 3500" << endl;}
};class Car
{
public:Car(Engine *pengine){m_engine = pengine;}virtual void installEngine() = 0;protected:Engine *m_engine;
};class BMW7 :public Car
{
public:BMW7(Engine *p) : Car(p){}//注意车的安装  和 发动机的安装 不同之处virtual void installEngine(){cout << "BMW7 " ; m_engine->installEngine();}
protected:
private:
};void main163()
{Engine4000 *e4000 = new Engine4000;BMW7 *bmw7 = new BMW7(e4000);bmw7->installEngine();delete bmw7;delete e4000;
}
void main()
{//main1601();//main1602();main163();system("pause");
}