求教三个类的写法

#ifndef LINKEDLIST_H

#define LINKEDLIST_H



#include <iostream>

using std::cout;

using std::cin;

using std::endl;





template < class Type >

class LinkedList

{

    public:

		LinkedList();

		~LinkedList();

  		

		void insert(const Type &item, int);

		void remove();

		Type retrieve() const;

		int  gotoPrior();

		int  gotoNext();

		int  gotoBeginning();

		void clear();

		int  empty() const;



		LinkedList(const LinkedList &src);



    protected:

		class ListElement

		{

			public:

				ListElement(const Type &item, ListElement* nextP):

					element(item), next(nextP) {}

				Type element;

				ListElement* next;

		};

		ListElement *head;

		ListElement *cursor;

};



#endif

#ifndef MEMO_H

#define MEMO_H

class Memo

{

	public:

		Memo();

		const char * getTime();

		const char * getTitle();

		void setTime(const char *stime);

		void setTitle(const char *stitle);

		int getKey();

	private:

		char time[6];

		char title[41];

};

#endif

#ifndef ORDLIST_H

#define ORDLIST_H

#include "linkedlist.cpp"

template <class Type, class Key>

class OrdList : public LinkedList<Type>//Inheritance

{

	public:

		OrdList();

		~OrdList();

		void insert(Type& item);

		void merge(const OrdList<Type,Key> other_list);

		int search(Key search_key);

};



#endif

#ifndef SCHEDULER_H

#define SCHEDULER_H

#include "Memo.h"

#include "OrdList.cpp"



class Scheduler

{

	public:

		Scheduler();

		void copyConstTest();

		void insertMemo(Memo newMemo);

		void deleteMemo(char *time);

	    void readMemos(char filename[]);

		void writeMemos(char filename[]);	

		void displayMemos();

		void mergeMemos(char filename[]);

		void clearMemos();



	private:

		OrdList<Memo, int> memos;  

};

#endif

#ifndef INTERFACE_H

#define INTERFACE_H



#include "Scheduler.h"



class Interface

{

	public:

		Interface ();

		void getCommand ();

	    void executeCommand ();

		int done ();//返回finished值



	private:

		Scheduler scheduler; 

		char command;

		int finished; 

};



#endif