《设计模式之禅（第2版）》——C++简单工厂实现

《设计模式之禅（第2版）》的读书笔记，原书是用java写的，由于C++语法和java语法还是有差异的，故自己用C++实现了一遍，其中难免不会有疏漏，望大家不吝赐教。

在这里插入图片描述
其中的NvWa就是main方法，这里没有单独使用类。其余的都与该图相同。

Human.h

#pragma once
class Human {
public:
	virtual void getColor() = 0;
	virtual void talk() = 0;
	virtual ~Human() {};
};

BlackHuman.h

#pragma once
#include "Human.h"
#include <iostream>
using namespace std;

class BlackHuman : public Human
{
public:
	void getColor()
	{
		std::cout << "黑色人种的皮肤颜色是黑的!" << endl;
	}

	void talk()
	{
		std::cout << "黑人会说话，一般人听不懂" << endl;
	}
};

WhiteHuman.h

#pragma once
#include "Human.h"
#include <iostream>
using namespace std;

class WhiteHuman : public Human
{
public:
	void getColor()
	{
		std::cout << "白人种的皮肤颜色是白色的!" << endl;
	}

	void talk()
	{
		std::cout << "白色人种会说话，一般说的都是单字节。" << endl;
	}
};

YellowHuman.h

#pragma once
#include "Human.h"
#include <iostream>
using namespace std;

class YellowHuman : public Human
{
public:
	void getColor()
	{
		std::cout << "黄色人种的皮肤颜色是黄色的!" << endl;
	}

	void talk()
	{
		std::cout << "黄色人种会说话，一般说的都是双字节。" << endl;
	}
};

AbstractFactory.h

#pragma once
#include <string>
#include <vector>
#include "Human.h"

class AbstractFactory
{
public:
	virtual Human *createHuman(std::string somehuman) = 0;
	~AbstractFactory() {}
};

HumanFactory.h

#pragma once
#include "AbstractFactory.h"
#include "Human.h"
#include "WhiteHuman.h"
#include "BlackHuman.h"
#include "YellowHuman.h"

class HumanFactory : public AbstractFactory
{
	Human *createHuman(std::string somehuman) override
	{
		if (somehuman == "black")
		{
			return new BlackHuman();
		}
		else if (somehuman == "white")
		{
			return new WhiteHuman();
		}
		else if (somehuman == "yellow")
		{
			return new YellowHuman();
		}

		return NULL;
	}
};

main.cpp文件：

#include <iostream>
#include "AbstractFactory.h"
#include "Human.h"
#include "HumanFactory.h"

int main()
{
	AbstractFactory *factory = new HumanFactory();
	Human *whiteHuman = factory->createHuman("white");
	whiteHuman->getColor();
	whiteHuman->talk();
	delete whiteHuman;

	std::cout << std::endl;

	Human *blackHuman = factory->createHuman("black");
	blackHuman->getColor();
	blackHuman->talk();
	delete blackHuman;

	std::cout << std::endl;

	Human *yellowHuman = factory->createHuman("yellow");
	yellowHuman->getColor();
	yellowHuman->talk();

	delete factory;
	delete yellowHuman;

	return 0;
}