设计模式之Factory模式（C++）

Factory模式具有两大重要的功能：

（1）、定义创建对象的接口，封装了对象的创建；

（2）、使具体化类工作延迟到了子类中。

//Product.h
#ifndef _PRODUCT_H_
#define _PRODUCT_H_

class Product
{
public:
      virtual ~Product();
protected:
       Product();
private:
   
};

class ConcreteProduct:public Product
{
public:
    ConcreteProduct();
    ~ConcreteProduct();
protected:

private:
};
#endif //_PRODUCT_H_

//Product.cpp
#include "Product.h"
#include <iostream>
using namespace std;

Product::Product()
{}
Product::~Product()
{}
ConcreteProduct::ConcreteProduct()
{}
ConcreteProduct::~ConcreteProduct()
{}

//Factory.h
#ifndef _FACTORY_H_
#define _FACTORY_H_

class Product;
class Factory
{
public:
    virtual ~Factory();
    virtual Product *CreateProduct() = 0; 
protected:
    void Factory();
private:
};

class ConcreteFactory:public Factory
{
public:
    ConcreteFactory();
    ~ConcreteFactory();
    Product * CreateProduct();
protected:
private:    
};
#endif //_FACTORY_H_

//Fatory.cpp

#include "Factory.h"
#include "Product.h"

#include <iostream>
using namespace std;

Factory::Factory()
{}
Factory::~Factory()
{}

ConcreteFactory::ConcreteFactory()
{}
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;
}