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public cpp v1 · immutableclass TravelHistory{private: struct RecordInfo { TravelRecord *data; bool deleteAtEnd; }; multiset<RecordInfo> *m_Records; // Debugpublic: TravelHistory(void); ~TravelHistory(void); void RecordTravel(TravelRecord *record, bool deleteAtEnd); void Display(ostream &ostr);};void TravelHistory::RecordTravel(TravelRecord *record, bool deleteAtEnd){ RecordInfo r; r.data = record; r.deleteAtEnd = deleteAtEnd; m_Records->insert(r);}