// PL0Pars.java

// This program is a recursive descent parser for PL/0.  Both the symbol 
// table and syntax tree representation for the program are constructed.

public class PL0Pars {

  public static void main (String args []) throws java.io.IOException {
    System . out . println ("Source Program");
    System . out . println ("--------------");
    System . out . println ("");

    Parser pl0 = new Parser ();
    SymbolTable env = new SymbolTable ();
    SyntaxTree syntaxTree = pl0 . program (env);
    System . out . println ("");
    syntaxTree . print ("main program");
    env . print ("main program");
  }

}