备忘录模式 撤销
#include<iostream>#include<string>#include<vector>usingnamespacestd;
/*
struct State {
string account;
string password;
string telNo;
};
class Memento {
private:
State* state;
public:
Memento(State* pstate) :state(pstate) {}
State* getState() {
return state;
}
};
*///备忘录class Memento {private:
string account;
string password;
string telNo;
public:
Memento(string account, string password, string telNo) {
this->account = account;
this->password = password;
this->telNo = telNo;
}
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;
}
};
//发起者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() {
Memento memento(account, password, telNo);
return memento;
}
void restoreMenmento(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;
}
};
//管理者class Caretaker {private:
vector<Memento>mementos;
public:
Memento getMemento(int i) {
return mementos.at(i);
}
void setMemento(Memento memento) {
mementos.push_back(memento);
}
};
int main() {
int index = -1;
UserInfoDTO user;
Caretaker taker;
user.setAccount("zhangsan");
user.setPassword("123456");
user.setTelNo("13000000000");
cout << "状态一:" << endl;
taker.setMemento(user.saveMemento());
index++;
user.show();
cout << "----------------------------------" << endl;
user.setPassword("111111");
user.setTelNo("13100001111");
cout << "状态二:" << endl;
taker.setMemento(user.saveMemento());
index++;
user.show();
cout << "----------------------------------" << endl;
user.setPassword("222222");
user.setTelNo("13100001111");
cout << "状态三:" << endl;
user.show();
cout << "----------------------------------" << endl;
cout << "回到状态二:" << endl;
index--;
user.restoreMenmento(taker.getMemento(1));
user.show();
cout << "----------------------------------" << endl;
cout << "回到状态一:" << endl;
index --;
user.restoreMenmento(taker.getMemento(0));
user.show();
cout << "----------------------------------" << endl;
}
usingnamespacestd; /* struct State { string account; string password; string telNo; }; class Memento { private: State* state; public: Memento(State* pstate) :state(pstate) {} State* getState() { return state; } }; *///备忘录class Memento {private: string account; string password; string telNo; public: Memento(string account, string password, string telNo) { this->account = account; this->password = password; this->telNo = telNo; } 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; } }; //发起者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() { Memento memento(account, password, telNo); return memento; } void restoreMenmento(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; } }; //管理者class Caretaker {private: vector<Memento>mementos; public: Memento getMemento(int i) { return mementos.at(i); } void setMemento(Memento memento) { mementos.push_back(memento); } }; int main() { int index = -1; UserInfoDTO user; Caretaker taker; user.setAccount("zhangsan"); user.setPassword("123456"); user.setTelNo("13000000000"); cout << "状态一:" << endl; taker.setMemento(user.saveMemento()); index++; user.show(); cout << "----------------------------------" << endl; user.setPassword("111111"); user.setTelNo("13100001111"); cout << "状态二:" << endl; taker.setMemento(user.saveMemento()); index++; user.show(); cout << "----------------------------------" << endl; user.setPassword("222222"); user.setTelNo("13100001111"); cout << "状态三:" << endl; user.show(); cout << "----------------------------------" << endl; cout << "回到状态二:" << endl; index--; user.restoreMenmento(taker.getMemento(1)); user.show(); cout << "----------------------------------" << endl; cout << "回到状态一:" << endl; index --; user.restoreMenmento(taker.getMemento(0)); user.show(); cout << "----------------------------------" << endl; }