设计模式——备忘录模式（C++实现）

 #include <iostream>
 #include <string>
 #include <vector>

 using namespace std;

 class STMemento
 {
 private:
         int iVitality;
 public:
         STMemento(){}
         STMemento(int iVitality)
         {
                 this->iVitality = iVitality;
         }

         int GetVitality() const
         {
                 return this->iVitality;
         }
 };

 class STOriginator
 {
 private:
         int iVitality;
         string name;
 public:
         STOriginator(string strName, int iVit): iVitality(iVit), name(strName)
         {

         }

         STMemento* SaveState()
         {
                 return new STMemento(iVitality);
         }

         void RecoverState(const STMemento* stMemento)
         {
                 this->iVitality = stMemento->GetVitality();
         }

         void SetVitality(int iVit)
         {
                 this->iVitality = iVit;
         }

         void Show()
         {
                 cout<< "Name: "<< name<< endl;
                 cout<< "Live: "<< iVitality<< endl;
         }
 };

 class STCareTaker
 {
 private:
         vector<STMemento*> vecStMemento;

 public:
         void AddMemento(STMemento* stMemento)
         {
                 vecStMemento.push_back(stMemento);
         }

         STMemento* GetMemento(int Iindex)
         {
                 if (Iindex >= vecStMemento.size())
                         return NULL;
                 else
                         return vecStMemento[Iindex];
         }
 };

 int main(int argc, char* argv[])
 {
         STOriginator* pstOriginator = new STOriginator("xxx", );
         cout<< "原始状态： "<< endl;
         pstOriginator->Show();

         STCareTaker* pstCareTaker = new STCareTaker();
         pstCareTaker->AddMemento(pstOriginator->SaveState());

         pstOriginator->SetVitality();
         cout<< "战斗后状态： "<< endl;
         pstOriginator->Show();

         pstOriginator->RecoverState(pstCareTaker->GetMemento());
         cout<< "归档后状态： "<< endl;
         pstOriginator->Show();

         return ;
 }
 /////////////////////////////
 [root@ ~/learn_code/design_pattern/15_memento]$ ./memento
 原始状态：
 Name: xxx
 Live: 

 战斗后状态：
 Name: xxx
 Live: 

 归档后状态：
 Name: xxx
 Live: