儲存存檔——備忘錄模式

備忘錄模式

備忘錄模式UML

備忘錄模式是在不破壞封閉的前提下，捕獲一個對象的内部狀态，并在該對象之外儲存這個狀态。這樣以後就可将該對象恢複到原先儲存的狀态。

#pragma once
#include <iostream>
#include <vector>
#include <string>
#include <Windows.h>

using namespace std;

//備份資料
class SaveDate
{
public:
	SaveDate(int attack, int defense, int hp)
	{
		this->attack	= attack;
		this->defense   = defense;
		this->hp		= hp;
	}

	int getAttack() const { return attack; }
	int getDefense() const { return defense; }
	int getHp() const { return hp; }

private:
	int attack; //攻擊力
	int defense;//防禦力
	int hp;		//生命力
};

//遊戲角色資料
class Person
{
public:
	Person():attack(0), defense(0), hp(0){}

	SaveDate* createSaveDate()
	{
		return new SaveDate(attack, defense, hp);
	}

	void setSaveDate(const SaveDate* date)
	{
		attack = date->getAttack();
		defense = date->getDefense();
		hp = date->getHp();
	}

	void showPerson()
	{
		cout << "英雄攻擊力"  << attack << endl;
		cout << "英雄防禦力" << defense << endl;
		cout << "英雄生命力" << hp << endl;
	}

	void deductVal(int attackVal, int defenseVal, int hpVal)
	{
		//增減人物數值
		attack	 += attackVal;
		defense  += defenseVal;
		hp		 += hpVal;
	}

private:
	int attack; //攻擊力
	int defense;//防禦力
	int hp;		//生命力
};

//備忘錄管理類
class SaveDateMgr
{
private:
	SaveDate* save;
public:
	SaveDate* restoreSaveDate()
	{
		return save;
	}

	void addSaveDate2Mgr(SaveDate* save)
	{
		this->save = save;
	}
};

int main()
{
	Person hero;
	SaveDateMgr mgr;

	//裝備武器，提升三維
	hero.deductVal(10, 5, 100);
	hero.showPerson();

	//儲存存檔
	mgr.addSaveDate2Mgr(hero.createSaveDate());

	//遇到怪獸進行戰鬥，掉80血
	hero.deductVal(0, 0, -80);
	hero.showPerson();

	//恢複存檔
	hero.setSaveDate(mgr.restoreSaveDate());
	hero.showPerson();


	system("pause");
	return 1;
}