设计模式之备忘录模式

备忘录模式原理：将对象的私有数据存储在其他地方，以便重新加载

代码如下：

#include <iostream>
#include <string>
#include <vector>
using namespace std;

class GameRole;
class Memeno
{
public:
	Memeno(int vitality = 0,int defense = 0,int attack = 0):
	m_vitality(vitality),m_defense(defense),m_attack(attack){}
	void show()
	{
		cout << "vitality:" << m_vitality << "m_defense:" <<m_defense<<"m_attack:"<<m_attack<<endl;
	}
friend GameRole;
private:
	int m_vitality;
	int m_defense;
	int m_attack;
};

class GameRole
{
public:
	GameRole():m_vitality(100),m_defense(100),m_attack(100){}
	Memeno Save()
	{
		return Memeno(m_vitality,m_defense,m_attack);
	}
	
	void Load(Memeno memeno)
	{
		m_vitality = memeno.m_vitality;
		m_defense = memeno.m_defense;
		m_attack = memeno.m_attack;
	}
	
	void attack()
	{
		m_vitality-=10;
		m_defense-=10;
		m_attack-=10;
	}

	void show()
	{
		cout << "vitality:" << m_vitality << "m_defense:" <<m_defense<<"m_attack:"<<m_attack<<endl;
	}

private:
	int m_vitality;
	int m_defense;
	int m_attack;
};

class MemnnoLibary
{
public:
	void Save(Memeno memeno)
	{
		m_vecMemeno.push_back(memeno);
	}
	Memeno Load(int state)
	{
		return m_vecMemeno[state];
	}
private:
	vector<Memeno> m_vecMemeno;

};



int main()
{
	GameRole role;
	Memeno memenno;
	MemnnoLibary ml;
	
	role.show();
	ml.Save(role.Save());
	role.attack();
	role.show();
	role.Load(ml.Load(0));
	role.show();
	return 0;
}