Error #1:

dim fxs$(len(fx$))
Syntax Error. DIM statement

Error #2:

for z=1 to array count(eqhold$())
Parameter Mismatch. Array must have at least one subscript.

I don't know what's wrong with them...What version of DBPro are you using?

I'm not using DBPro, I'm using DBC v1.13.

Well then that must be the problem...It was made in Darkbasic Pro

I would suggest going through the code and changing it to work with DBC...I would but I've never used DBC before so I couldn't tell you the difference

Well, I've been doing as you suggested. Although, I have discovered that it is easier to rewrite the code using yours as a referance.

Right now, I can evaluate simple (non-nested) expressions. i.e. X*X+24/Y*2

I will be working on the parenthesis and such later...

Also, thanks for the help. I will post my completed code here.

Ok cool I'd appreciate to see how a different person would go about making one