【设计模式】4.装饰器模式

装饰器模式，就是动态的给一个对象增加一些职责。

UML

code

#include "3.h"


int main()
{
	// 有点类似于压栈的感觉, 显示人名 + 装饰1 + 装饰2 + 装饰3 => 输出 装饰321的人
	Person* person = new Person("syc");

	Tshrit* tshrit = new Tshrit();
	tshrit->decorate(person);

	Shoes* shoes = new Shoes();
	shoes->decorate(tshrit);

	Tie* tie = new Tie();
	tie->decorate(shoes);

	tie->show();
	return 0;
}

#pragma once
#include <string>
#include <iostream>
// 形象类
class ICharacter
{
public:
	virtual void show() = 0;
private:
};

// 人
class Person : public ICharacter
{
public:
	Person(const std::string& name) : name(name) {}
	void show() override
	{
		std::cout << "装扮的" << this->name;
	}
private:
	std::string name;
};

// 装饰类
class Decorator : public ICharacter
{
public:
	void decorate(ICharacter* character)
	{
		this->character = character;
	}
	void show() override
	{
		character->show();
	}

protected:
	ICharacter* character;
};

// Tshrit
class Tshrit : public Decorator
{
public:
	void show() override
	{
		std::cout << "T Shrit";
		Decorator::show();
	}
private:
};

// 鞋子
class Shoes : public Decorator
{
public:
	void show() override
	{
		std::cout << "鞋子";
		Decorator::show();
	}
};

// 领带
class Tie : public Decorator
{
public:
	void show() override
	{
		std::cout << "领带";
		Decorator::show();
	}
};