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1.cpp
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1.cpp
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#include<iostream>
using namespace std;
class Memento
{
private:
int state;
public:
Memento(int myState):state(myState){}
int GetState()
{
return this -> state;
}
void SetState(int myState)
{
this -> state = myState;
}
};
class Originator
{
private:
int state;
public:
Memento* CreateMemento()
{
cout << "save state..." << endl;
Memento* memento = new Memento(state);
return memento;
}
void SetMemento(Memento* m)
{
cout << "restore state..." << endl;
this -> state = m -> GetState();
}
int GetState()
{
return this -> state;
}
void SetState(int myState)
{
this -> state = myState;
}
};
int main()
{
Originator* originator = new Originator();
cout << "current state:" << originator -> GetState() << endl;
Memento* memento = originator -> CreateMemento();
int state = 100;
originator -> SetState(100);
cout << "current state:" << originator -> GetState() << endl;
originator -> SetMemento(memento);
cout << "current state:" << originator -> GetState() << endl;
return 0;
}