Define an exponentiation operation into the specification file

[MarK One]

hi guys
I modified an example file of a simple calculator adding one more operation (i called it 'pow').
However, when i executed the modified file i had an error.
I attached the file and the screen of errors.
Thank you

[Etienne Gagnon]

Mark,

It would seem that you have a null reference problem in your code. I would suggest that you use a debugger to help you find it.

Have fun!

Etienne

-- 
Etienne Gagnon, Ph.D.
http://sablecc.org