设计模式学习1-工厂方法模式

来源：互联网发布：淘宝评价好评怎么修改编辑：程序博客网时间：2024/06/06 02:59

前几天接到吉威时代电话面试，问了一个设计模式的问题，这方面自己只是了解，但不是很熟悉，所以没回答上，于是决定现在开始学习这方面的知识，先从最简单的工厂方法模式开始：

这种模式其实就是新建一个Factory接口，每个产品都有各自的工厂继承自该接口，来生产不同的产品，以水果为例：

#include<iostream>class Fruit{public:    Fruit(){};    virtual ~Fruit(){};    virtual void sayHello(void)=0;    virtual void showColor(void)=0;};class Apple:public Fruit{public:    Apple(){}    ~Apple(){}    void sayHello(void){std::cout<<"I am apple!"<<std::endl;}    void showColor(void){std::cout<<"My color is red!"<<std::endl;}};class Banana:public Fruit{public:    Banana(){}    ~Banana(){}    void sayHello(void){std::cout<<"I am banana!"<<std::endl;}    void showColor(void){std::cout<<"My color is yellow!"<<std::endl;}};class Factory{public:    Factory(){}    virtual ~Factory(){}    virtual Fruit* createFruit()=0;};class AppleFactory:public Factory{public:    AppleFactory(){}    ~AppleFactory(){}    Fruit* createFruit(){        return new Apple();}};class BananaFactory:public Factory{public:    BananaFactory(){}    ~BananaFactory(){}    Fruit* createFruit(){        return new Banana();}};int main(){    AppleFactory *af=new AppleFactory();    Fruit *apple=af->createFruit();    apple->sayHello();    apple->showColor();    BananaFactory *bf=new BananaFactory();    Fruit *banana=bf->createFruit();    banana->sayHello();    banana->showColor();    delete af;    delete apple;    delete bf;    delete banana;    return 0;}

0 0