設計模式之Factory模式（C++）

標籤：

Factory模式具有兩大重要的功能：

（1）、定義建立對象的介面，封裝了對象的建立；

（2）、使具體化類工作延遲到了子類中。

//Product.h#ifndef _PRODUCT_H_#define _PRODUCT_H_class Product{public:      virtual void ~Product();protected:       void Product();private:   }class ConcreteProduct:public Product{public:    void ConcreteProduct();    void ~ConcreteProduct();protected:private:}#endif //_PRODUCT_H_

//Product.cpp#include "Product.h"#include <iostream>using namespace std;void Product::Product(){}void Product::~Product(){}void ConcreteProduct::ConcreteProduct(){}void ConcreteProduct::~ConcreteProduct(){}

//Factory.h#ifndef _FACTORY_H_#define _FACTORY_H_class Product;class Factory{public:    virtual void ~Factory();    virtual Product *CreateProduct() = 0; protected:    void Factory();private:};class ConcreteFactory:public Factory{public:    void ConcreteFactory();    void ~ConcreteFactory();    Product * CreateProduct();protected:private:    }#endif //_FACTORY_H_

//Fatory.cpp#include "Factory.h"#include "Product.h"#include <iostream>using namespace std;void Factory::Factory(){}void Factory::~Factory(){}void ConcreteFactory::ConcreteFactory(){}void ConcreteFactory::ConcreteFactory(){}Product ConcreteFactory::CreateProduct(){    ConcreteProduct cproduct = new ConcreteProduct;    return product;}

//main.cpp#include "Factory.h"#include "Product.h"#include <iostream>using namespace std;int main(int argc,char *argv[]){    Factory *fac = new ConcreteFactory;    Product *p = fac->CreateProduct();    return 0;}

設計模式之Factory模式（C++）