// In this file the constructor and String2Id and Id2String methods do not need to be modified
// However you can always code them differently if you want to.
import java.util.*;
import java.*;
import java.io.*;


public class Scanner
{

	private static final int EOF = 255; // This means the end of file
	public int sym; // The current token on the input, 0 = error token, 255 = end-of-file token
	public int val; // value of the last number encountered
	public int id; // id of the last identifier encountered

	private FileReader fileHandler;

	// You can use the data structure class called ArrayList to insert identifiers and later retrieve them using
	// String2Id and Id2String methods

	public ArrayList identifierList;

	public Scanner(String fileName)
	{

		identifierList = new ArrayList();
		fileHandler = new FileReader(fileName);

	}//End of constructor


	/////////////////////////////////////////////////////

	public void Next()
	{


	}//End of Scanner Next


	/////////////////////////////////////////////////////
	public void Error(String errorMsg)
	{
		System.out.println(errorMsg);
		fileHandler.Error(errorMsg);
		return;
	}

	/////////////////////////////////////////////////////

	/* IDENTIFIER TABLE METHODS */

	/* This method is intended to provide the identifier
	 * and as an input it accepts the index
	 */
	public String Id2String(int id)
	{
		return ((String)identifierList.get(id));
	}


	/////////////////////////////////////////////////////

	/* This method is intended to provide the index of the identifier
	 * in the List. It recieves the identifier as an input and outputs the index
	 */
	public int String2Id(String name)
	{
		return (identifierList.indexOf(name));
	}

} // end of class Scanner