import java.io.*;

/*
  Author:  James Tam
  Version: Jan 21, 2013

  External source code used:
  * Getting the command-line input
  * Reading from file
  * Converting the lines from file to numeric form.
*/

public class Guessing
{
    public static void main(String [] args) throws Exception
    {
        FileReader fr = null;
        BufferedReader br = null;
        String filename = null;
        String lineFromFile = null;
        boolean finished = false;
        int num = -1;
    
        // JT: The first and only input to the program (after name of Java 
        // file) must be the name of the input file. 
        // the 
        if (args.length != 1)
            System.out.println("Usage:java Guessing <name of input file>");
        else
        {
            filename = args[0];
            fr = new FileReader(filename);
            br = new BufferedReader(fr);
            lineFromFile = br.readLine();

            // JT: Empty input file
            if (lineFromFile == null)
            {
                System.out.println("Empty input file: no guesses to play with");
                finished = true;
            }
            else
                num = Integer.parseInt(lineFromFile);

            // JT, Non-empty input file: one stopping condition is when the
            // last line in the input file has been reached.
            while(finished == false) 
            {    
                // JT: Echo the data from file onscreen, actual program
                // needs to play the game.
                System.out.println(num);

                // JT: EOF reached
                lineFromFile = br.readLine();
                if (lineFromFile == null)
                    finished = true;
                else
                    num = Integer.parseInt(lineFromFile);
            }
        }
    }
}