/**
 * A primitive tester to verify that the parser
 * works as expected.
 *
 * @author <a href="http://www.heimetli.ch/te.html">P. Tellenbach</a>
 * @version 16. Dec. 2007
 */
public class Main
{
  /**
   * Traverses the parse tree and prints the
   * nodes in post order
   * @param n root of the tree
   */
  public static void traverse( Node n )
  {
     if( n != null )
     {
        traverse( n.getLeft()  ) ;
        traverse( n.getRight() ) ;

        System.out.print( " " + n.getString() ) ;
     }
  }

  /**
   * Instantiates the parser and lets it parse
   * the command line arguments
   * @param args command line arguments
   */
  public static void main( String args[] )
  {
     Parser parser = new Parser() ;

     for( int i = 0; i < args.length; i++ )
     {
        try
        {
           traverse( parser.parse(args[i]) ) ;
           System.out.println() ;
        }
        catch( Exception e )
        {
           e.printStackTrace( ) ;
        }
     }
  }
}