import java.util.Vector;
import java.io.FileReader;



class test{
    public static Exp res;
    public static int a = 0;
    public static void main (String[] arg) {
	try {
        FileReader  myFile = new FileReader(arg[0]);
	Lexer myLex = new Lexer(myFile);
	parser myP = new parser(myLex);	
	try {myP.parse();}
	  catch (Exception e) {
	      System.out.println("parse error");
	  }
	}
	catch (Exception e){
	    System.out.println("invalid file");	    
	}
        Print pr = new Print(System.out);
	pr.prExp(res,10);
        System.out.println();
    }
}