check marked the functions I have completed
Changed the parameter types.
Change return type of toPostFix function.
Commented out debugging statements.
Fixed a bug where when dealing with special characters it went off the end of the string.
Removed that comment because it messed up my brackets.
Working on a bug in toPostFix
Added some helper debugging statements. Formatted the postfix exp a little neater.

Turns out it has been working fine it's just that I didn't recognize it
because of the format.
toPostFix works if there are no brackets.
The tokenizer doesn't seem to be tokenizing the parenthesis correctly.
I think the problem was because for special numbers it doesn't stop at brackets.

I added a clause to the while loop but the program now crashes.
Tokenizer is fixed.
Fixed toPostFix and tested it a little bit.

The problem was the stack was trying to pop when their were no more
elements in the stack because the boolean expression used "or" instead
of "and" so when it did encounter the "(" it just went on to the next
test.
Created the isVariable function prototype and header.
Finished and tested the isVariable function.
Craeted the function header.
Evaluated finished and tested.

Recycled code from lab.
Took out a cout statement in evaluator
Finished a small part of the validator.
finished the main. Have not really tested.

Will test after removing debugging statements.