2024.11.21（周四）

改进课堂上的“用户信息操作撤销”实例，使得系统可以实现多次撤销（可以使用HashMap、ArrayList等集合数据结构实现）。

实验要求：

1.     画出对应的类图；

2.     提交源代码；

3. 注意编程规范。

 

 

1、类图

 

2、源代码

#include<iostream>

#include <list>

using namespace std;

class Memento {

private:

    string account;

    string password;

    string telNo;

public:

    string getAccount() {

        return account;

    }

    void setAccount(string account) {

        this->account = account;

    }

    string getPassword() {

        return password;

    }

    void setPassword(string password) {

        this->password = password;

    }

    string getTelNo() {

        return telNo;

    }

    void setTelNo(string telNo) {

        this->telNo = telNo;

    }

    Memento(string account, string password, string telNo) {

        this->account = account;

        this->password = password;

        this->telNo = telNo;

    }

};

class UserInfoDTO {

private:

    string account;

    string password;

    string telNo;

public:

    string getAccount() {

        return account;

    }

    void setAccount(string account) {

        this->account = account;

    }

    string getPassword() {

        return password;

    }

    void setPassword(string password) {

        this->password = password;

    }

    string getTelNo() {

        return telNo;

    }

    void setTelNo(string telNo) {

        this->telNo = telNo;

    }

 

    Memento* saveMemento() {

        return new Memento(account,password,telNo);

    }

    void restoreMemento(Memento *memento) {

        this->account=memento->getAccount();

        this->password=memento->getPassword();

        this->telNo=memento->getTelNo();

    }

    void show() {

        cout<<"Account:"<<this->account<<endl;

        cout<<"Password:"<<this->password<<endl;

        cout<<"TelNo:"<<this->telNo<<endl;

    }

};

class Caretaker {

private:

    list<Memento*> ll;

public:

    Memento* getMemento() {

        ll.pop_front();

        Memento* mm=ll.front();

        return mm;

    }

    void setMemento(Memento *memento) {

        ll.push_front(memento);

    }

};

int main(){

        UserInfoDTO *user=new UserInfoDTO();

        Caretaker *c=new Caretaker();

 

        user->setAccount("zhangsan");

        user->setPassword("123456");

        user->setTelNo("1310000000");

        cout<<"状态一:"<<endl;

        user->show();

        c->setMemento(user->saveMemento());

        cout<<"-----------------------------"<<endl;

 

        user->setPassword("111111");

        user->setTelNo("1310001111");

        cout<<"状态二:"<<endl;

        user->show();

        c->setMemento(user->saveMemento());

        cout<<"-----------------------------"<<endl;

 

        user->setPassword("zyx666");

        user->setTelNo("15733333333");

        cout<<"状态三:"<<endl;

        user->show();

        c->setMemento(user->saveMemento());

        cout<<"-----------------------------"<<endl;

 

        user->setPassword("777777");

        user->setTelNo("15511111111");

        cout<<"状态四:"<<endl;

        user->show();

        c->setMemento(user->saveMemento());

        cout<<"-----------------------------"<<endl;

 

        user->setPassword("666666");

        user->setTelNo("17455555555");

        cout<<"状态五:"<<endl;

        user->show();

        c->setMemento(user->saveMemento());

        cout<<"-----------------------------"<<endl;

 

 

        user->restoreMemento(c->getMemento());

        cout<<"回到状态四:"<<endl;

        user->show();

        cout<<"-----------------------------"<<endl;

 

        user->restoreMemento(c->getMemento());

        cout<<"回到状态三:"<<endl;

        user->show();

        cout<<"-----------------------------"<<endl;

 

        user->restoreMemento(c->getMemento());

        cout<<"回到状态二:"<<endl;

        user->show();

        cout<<"-----------------------------"<<endl;

 

        user->restoreMemento(c->getMemento());

        cout<<"回到状态一:"<<endl;

        user->show();

        cout<<"-----------------------------"<<endl;

}