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工厂模式的C++实现

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工厂模式的C++实现

ref: 工厂模式

方法工厂

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#include<iostream>
using namespace std;

class Shoe{
    public:
        virtual ~Shoe(){};
        virtual void show() = 0;

};

class NikeShoe:public Shoe{
    public:
        void show(){

            cout<<"我是Nike"<<endl;
            
        }

};

class Factory{
    public:
        virtual ~Factory(){};
        virtual Shoe* Makeshoe() = 0;

};

class NikeFactory : public Factory{
    public:
        Shoe* Makeshoe() {
            Shoe* tmp = new NikeShoe;
            return tmp;
        }
        
    
};

int main()
{

    //Step1 指定工厂
    Factory* f = new NikeFactory();
    //Step2 工厂生产出鞋子
     Shoe*  s  = f->Makeshoe();   
    //Step3 打出口号
    s->show();

    // cout<<"hello world"<<endl;
}

抽象工厂

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#include<iostream>
using namespace std;

class Shoe{
    public:
        virtual ~Shoe(){};
        virtual void show() = 0;

};
class NikeShoe:public Shoe{
    public:
        void show(){

            cout<<"我是Nike的鞋子"<<endl;
            
        }

};


class Cloth{
    public:
        virtual ~Cloth(){};
        virtual void show() = 0;

};
class NikeCloth:public Cloth{
    public:
        void show(){

            cout<<"我是Nike的衣服"<<endl;
            
        }

};

class Factory{
    public:
        virtual ~Factory(){};
        virtual Shoe* Makeshoe() = 0;
        virtual Cloth* Makecloth() = 0;

};


class NikeFactory : public Factory{
    public:
        Shoe* Makeshoe() {
            Shoe* tmp = new NikeShoe;
            return tmp;
        }
        Cloth* Makecloth() {
            Cloth* tmp = new NikeCloth;
            return tmp;
        }
};


int main()
{

    //Step1 指定工厂
    Factory* f = new NikeFactory();
    //Step2 工厂生产出鞋子
     Shoe*  s  = f->Makeshoe();   
    //Step3 打出口号
    s->show();

    //Step2 工厂生产衣服
     Cloth*  c  = f->Makecloth();   
    //Step3 打出口号
    c->show();
   
}

模板工厂

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#include<iostream>
using namespace std;

#include<iostream>
using namespace std;

class Shoe{
    public:
        virtual ~Shoe(){};
        virtual void show() = 0;

};
class NikeShoe:public Shoe{
    public:
        void show(){

            cout<<"我是Nike的鞋子"<<endl;
            
        }

};


class Cloth{
    public:
        virtual ~Cloth(){};
        virtual void show() = 0;

};
class NikeCloth:public Cloth{
    public:
        void show(){

            cout<<"我是Nike的衣服"<<endl;
            
        }

};

template<class AbsProductType_t>
class Factory{
    public:
        virtual ~Factory(){};
        virtual AbsProductType_t* MakeProduct() = 0;


};

template<class AbsProductType_t,class ConcreatProductType_t>
class ConcreatFactory : public Factory<AbsProductType_t>{
    public:
  
        AbsProductType_t* MakeProduct() {
            AbsProductType_t* tmp = new ConcreatProductType_t;
            return tmp;
        }

};




int main(){
     ConcreatFactory<Cloth,NikeCloth> f;
     Cloth* ns = f.MakeProduct();
     ns->show();
}