import java.io.*;
import java.lancs.*;

public class Ex7n6
{

  public static void menu ()
    {
      System.out.println ();
      System.out.println ("q : quit");
      System.out.println ("m : menu");
      System.out.println ("s : set start");
      System.out.println ("f : set finish");
      System.out.println ("l : set litres");
      System.out.println ("p : print journey");
      System.out.println ();
    }

  public static void main (String[] args) throws IOException
    {
      Journey trip = new Journey ();

      menu ();

      while (true)
        {
          System.out.println ();
          System.out.print ("Choose a command : ");
          char command = BasicIo.readCharacter ();

          if (command == 'q')
            {
              break;
            }

          switch (command)
            {
            case 'm' :
              menu ();
              break;
            case 's' :
              System.out.print ("start mileage: ");
              trip.setStart (BasicIo.readDouble ());
              break;
            case 'f' : 
              System.out.print ("finsh mileage: ");
              trip.setFinish (BasicIo.readDouble ());
              break;
            case 'l' : 
              System.out.print ("no of litres: ");
              trip.setLitres (BasicIo.readDouble ());
              break;
            case 'p' :
              System.out.println (trip);
              break;
            }
        }
    } 

} // end of class Ex7n6