设计模式(C++) 练习1 简单工厂模式

Design Patterns(C++) Exercise 1：Easy Factory Model

Exercise 1.1

一个农场专门负责种植各种水果，比如苹果、草莓、葡萄等，任何水果都可以种植、生长和采摘.此外，每一种水果还有自己的特性，如：苹果是多年生具有树龄的属性，葡萄则分为有籽或无籽等。农场生产的水果都送入超市进行销售。请采用简单工厂模式对上述问题进行建模，要求画出类图并使用C++语言编写程序。

/** *	@author 墨晓柯*/#include<iostream>#define interface classusing namespace std;interface IFruit {
public: virtual void plant() = 0; virtual void grow() = 0; virtual void harvest() = 0;
}; class Apple : public IFruit{
private:int treeAge;
public:	void setTreeAge(int aTreeAge) {treeAge = aTreeAge;} int getTreeAge() {return treeAge;}void plant() { cout << "Apple planted!" << endl;}void grow() { cout << "Apple growing!" << endl;}void harvest() {cout << "Apple harvested!" << endl;}	
};class Strawberry : public IFruit {
public:void plant() {cout << "Strawberry planted!" << endl;}void grow() {cout << "Strawberry growing!" << endl;}void harvest() {cout << "Strawberry harvested!" << endl;}
};class Grape : public IFruit {	
private:bool seedful;
public:	void setSeedful(bool hasSeed) { seedful = hasSeed;} bool getSeedful() { return seedful;}void plant() { cout << "Grape planted!" << endl;}void grow() { cout << "Grape growing!" << endl;}void harvest() { cout << "Grape harvested!" << endl;}
};class Gardener {
public:static IFruit* fruitFactory(string fruitName) {if("apple" == fruitName) return new Apple();else if("strawberry" == fruitName) return new Strawberry();else if("grape" == fruitName) return new Grape();elsereturn NULL;}
};int main(void) {	IFruit *fruit1 = Gardener::fruitFactory("apple");fruit1 -> plant();fruit1 -> grow();fruit1 -> harvest();IFruit *fruit2 = Gardener::fruitFactory("strawberry");fruit2 -> plant();fruit2 -> grow();fruit2 -> harvest();	IFruit *fruit3 = Gardener::fruitFactory("grape");fruit3 -> plant();fruit3 -> grow();fruit3 -> harvest();return 0;
}

Exercise 1.2

“俗说天地开辟，未有人民，女娲抟黄土为人”，女娲需要用黄土造出一个个人，如张三、李四王五等。采用简单工厂模式对上述问题进行建模要求画出类图并使用C++语言编写程序。

/** *	@author 墨晓柯*/#include<iostream>#define interface classusing namespace std;interface IHuman {
public: virtual void eat() = 0; virtual void sleep() = 0; virtual void speak() = 0;
}; class ZhangSan : public IHuman{
public:	void eat() {cout << "ZhangSan eat." << endl;}void sleep() {cout << "ZhangSan sleep." << endl;}void speak() {cout << "ZhangSan speak." << endl;}
};class LiSi: public IHuman {
public:void eat() {cout << "LiSi eat." << endl;}void sleep() {cout << "LiSi sleep." << endl;}void speak() {cout << "LiSi speak." << endl;}
};class WangWu : public IHuman {	
public:	void eat() {cout << "WangWu eat." << endl;}void sleep() {cout << "WangWu sleep." << endl;}void speak() {cout << "WangWu speak." << endl;}
};class Nuwa {
public:static IHuman* humanFactory(string name) {if("zhangSan" == name) return new ZhangSan();	else if("liSi" == name) return new LiSi();	else if("wangWu" == name) return new WangWu();else return NULL;}
};int main(void) {	IHuman *zhangSan = Nuwa::humanFactory("zhangSan");zhangSan -> eat();zhangSan -> sleep();zhangSan -> speak();IHuman *liSi = Nuwa::humanFactory("liSi");liSi -> eat();liSi -> sleep();liSi -> speak();	IHuman *wangWu = Nuwa::humanFactory("wangWu");wangWu -> eat();wangWu -> sleep();wangWu -> speak();return 0;
}