9/30/2009 3rd Week of fall 2009

To do:

We are thinking about to change the structure of the program which will be the second version of it. We plan to use recursion function instead of current string manipulation.


So that we start with basic operation first:
a + b -> plus(a,b)

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for now,
the parser is updated to change -+ to -
and i delete the advanced feature switch because it doesn't work properly.