public class TestExpressionTree {

// Construct and evaluate an ExpressionTree for the express (2+10)/(3*(3-1))
   public static void main(String[] args) {

       ExpressionTree eTree =
           new ExpressionTree(
                   '/',
                   new ExpressionTree(
                           '+',
                           new ExpressionTree(2),
                           new ExpressionTree(10)
                           ),
                   new ExpressionTree(
                           '*',
                           new ExpressionTree(3),
                           new ExpressionTree(
                                   '-',
                                    new ExpressionTree(3),
                                    new ExpressionTree(1)
                                    ) 
                           )
                   );
      eTree.displayInorder();       
      System.out.println(eTree.parenthesizedExp());
      System.out.println("Value = " + eTree.evaluate());
}
}