using System;

public class CalculatorMain
{
  public static void Main (string[] args)
    {
      try
        {
          CalculatorTokenizer t;
          
          if(args.Length>0)
            t = new CalculatorTokenizer(args[0],true);
          else
            t = new CalculatorTokenizer();

          try
            { // arg to parse is to enable building the parse tree
              // - COMPACT_TREE for the trimmed version
              CalculatorParser p = new CalculatorParser(t);
              p.Parse(CalculatorParser.COMPACT_TREE);
            }
          catch (Exception e)
            {
              Console.WriteLine("*** Parsing error: "+e);
            }
        }
      catch (Exception e)
        {
          Console.WriteLine("*** Tokenizing error: "+e);
        }
    }
}