import java.util.Scanner;

public class MyDCTest  {

    public static void main (String[] args) {

        String expression, again;

        int result;

        try
        {
            Scanner in = new Scanner(System.in);

            do
            {
                MyDC evaluator = new MyDC();
                System.out.println ("Enter a valid postfix expression: ");
                expression = in.nextLine();

                result = evaluator.evaluate (expression);
                System.out.println();System.out.println ("That expression equals " + result);

                System.out.print ("Evaluate another expression [Y/N]? ");
                again = in.nextLine();
                System.out.println();
            }
            while (again.equalsIgnoreCase("y"));
        }
        catch (Exception IOException)
        {
            System.out.println("Input exception reported");
        }
    }
}