备忘录模式和策略模式

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

class Mem{ //备忘录类
public:
Mem(string name, int age){
m_name = name;
m_age = age;
}
string getName(){
return m_name;
}
int getAge(){
return m_age;
}
void setName(string name){
m_name = name;
}
void setAge(int age){
m_age = age;
}

private:
string m_name;
int m_age;
};

class Person{
public:
Person(string name, int age){
m_name = name;
m_age = age;
}
string getName(){
return m_name;
}
int getAge(){
return m_age;
}
void setName(string name){
m_name = name;
}
void setAge(int age){
m_age = age;
}

//保存
Mem *createMem(){
return new Mem(m_name, m_age);
}
//还原
void setMem(Mem *mem){
this->m_age = mem->getAge();
this->m_name = mem->getName();
}
void printT(){
cout<<"m_name: "<<m_name<<"m_age: "<<m_age<<endl;
}
private:
string m_name;
int m_age;
};

//增加一个备忘录的管理者!!!
class Manager{
public:
Manager(Mem *m){
this->m = m;
}
Mem *getMem(){
return m;
}
void setMem(Mem *m){
this->m = m;
}
private:
Mem *m; //持有一个备忘录的引用!!!
};

int main(void){
/*
Mem *m = NULL;
Person *p = new Person("张三",32);
p->printT();
//创建Person对象的一个状态
cout<<"---------------------------"<<endl;
m = p->createMem();
p->setAge(42);
p->printT();

cout<<"还原旧的状态"<<endl;
p->setMem(m);
p->printT();

delete p;
*/

Manager *m1;
Person *p = new Person("张三",32);
p->printT();
//创建Person对象的一个状态
cout<<"---------------------------"<<endl;
m1 = new Manager(p->createMem());
p->setAge(42);
p->printT();

cout<<"还原旧的状态"<<endl;
p->setMem(m1->getMem());
p->printT();

delete p;

return 0;
}

#include<iostream>
using namespace std;

//策略模式：准备一组算法,并将每一个算法封装起来,使得它们可以互换;

class Strategy{
public:
virtual void crypt() = 0;
private:
};

class AES : public Strategy{
public:
virtual void crypt(){
cout<<"AES加密算法"<<endl;
}
private:

};

class DES : public Strategy{
public:
virtual void crypt(){
cout<<"DES加密算法"<<endl;
}
private:

};

class Context{  //组合算法的抽象类
public:
void setStrategy(Strategy *strategy){
this->strategy = strategy;
}
void myoperator(){
strategy->crypt();
}

private:
Strategy *strategy;
};
int main(void){
//1、直接调用的方法;
/*
DES *des = new DES;
des->crypt();
delete des;
*/

//2、客户端可以自由的进行策略的更换;
//Strategy *des = new DES;
Strategy *des = new AES;
Context *context = new Context;
context->setStrategy(des);
context->myoperator();

delete des;
delete context;

return 0;
}