/*
*	cRecorder
*	---------
*	Author: C. Pollett
*	Date: Jan 20. 1999
*	Purpose: This class can be used to store a list of Objects
*	
*
*/
public class cRecorder  {

	cRecordNode first, last;
	
	/*
	* Constructors: (only one)
	*
	* Example use:
	*	a = new cRecorder();
	* This list would create an empty cRecorder instance.
	*/	
	public cRecorder()
	{
		first=last=null;
	}

	/*
	* add - adds an item to a cRecorder instance
	*
	*Example:
	* cRecorder a;
	* a=new cRecorder();
	*	.
	*	.
	*	.
	* a.add("hi There");
	* This would "hi there" to the end of the current cRecorder
	*list.  
	*/
	public void add(Object data){
		cRecordNode tmp;	
		
		tmp = new cRecordNode(data,null);

		if(isEmpty()) 
			{first=last=tmp;}
		else
		{	last.setNext(tmp);
		 	last=tmp;
	
		}		
	}

	/*
	* clear() -- clears the cRecorder list
	*
	*/
	public void clear()
	{
		first=last=null;
	}

	/*
	* isEmpty -- returns true iff the current cRecorder list is empty
	*
	*/
	public boolean isEmpty()
	{
		return (first == null); 
	}

	/*
	* toString() - returns a string listing out the objects in
	*		the cRecorder with one object followed by
	*		a carriage return on each line.
	*
	*/
	public String toString() 
	{
		//insert your code here.
	}	
}

/*
	cRecordNode
	-----------
	Purpose: Auxiliary class to cRecorder used to
		actually story data in a list
*/
class cRecordNode {
	private Object d;
	private cRecordNode n;

	cRecordNode(Object data, cRecordNode next) {
		d=data;
		n=next;
	}

	/*
	*	getData() -- This method returns the data
	*			in a cRecordNode
	*/
	Object getData(){
		return d;
	}
	
	/*
	*	getNext() -- returns the next cRecordNode
	*			of this instance
	*/
	cRecordNode getNext(){
		return n;
	}

	/*
	*	setNext() -- sets the next cRecordNode
	*			of this instance
	*/
	void setNext( cRecordNode next){
		n=next;
	}
}