PARSER_BEGIN(Exp)
public class Exp {
  public static void main(String args[]) throws ParseException {
    Exp parser = new Exp(System.in);
    parser.ExpressionList();
  }
}

PARSER_END(Exp)
SKIP :
{ " " | "\t" | "\n" | "\r" }

TOKEN :
{
  < ID: ["a"-"z","A"-"Z"] ( ["a"-"z","A"-"Z","0"-"9"] )* >
|
  < NUM: ( ["0"-"9"] )+ >
}

void ExpressionList() :
{ String s; }
{
	{ System.out.println(
	     "Please type in an expression followed by a \";\" or ^D to quit:");
	  System.out.println(""); }
  ( Expression() ";" )*
  <EOF>
}

void Expression() :
{ }
{
    Term() ( "+" Term() )*
}

void Term() :
{ }
{
  Factor() ( "*" Factor() )*
}

void Factor() :
{ Token t; String s; }
{ t=<ID>
	{ System.out.println("Just read a " +t.image); }
|
  t=<NUM>
	{ System.out.println("Just read a " + t.image); }
|
  "(" Expression() ")"
        { System.out.println("Just read a parenthesized expression");	 }
}