C++工厂模式例子

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原创最新推荐文章于 2026-04-11 10:49:37 发布 655 阅读 AI 写同款· GEO 优化 ›

设计模式 C++简单工厂简单例子工厂模式通过引入一个工厂类来负责对象的创建，而客户端代码只需要与这个工厂类交互，无须关心具体的对象创建细节。阅读详情

之前一直没有理解C++的纯虚函数到底是什么意思，最近突然发现C++和Java完全可以对比着学，两者很多地方都是相通的，比如下面的工厂模式的C++例子就是一个很好的例子：

#include <iostream>

/*
工厂模式例子 
*/
class Animal
{
public:
	Animal(){}
	~Animal(){}
	virtual void bark() = 0;
};

class Dog:public Animal
{
public:
	Dog(){}
	~Dog(){}		
	void bark(){std::cout<<"Wang!\n";}
};

class Cat:public Animal
{
public:
	Cat(){}
	~Cat(){}
	void bark(){std::cout<<"Miao!\n";}
};

class AnimalFactory
{
public:
	AnimalFactory(){}
	~AnimalFactory(){}
	virtual Animal* createAnimal() = 0;
};

class DogFactory:public AnimalFactory
{
public:
	DogFactory(){}
	~DogFactory(){}
	Animal* createAnimal()
	{
		return new Dog();
	}
};

class CatFactory:public AnimalFactory
{
public:
	CatFactory(){}
	~CatFactory(){}
	Animal* createAnimal()
	{
		return new Cat();
	}
};

int main(int argc, char** argv) 
{	
	AnimalFactory *factory = new DogFactory();
	Animal *animal = factory->createAnimal();
	animal->bark();
	delete factory;
	delete animal;
	
	factory = new CatFactory();
	animal = factory->createAnimal();
	animal->bark();
	delete factory;
	delete animal;
	
	return 0;
}