Z function :)

[na_th_an]

I agreed from the beginning, I always said "problems within a large program"

I used an expression evaluator once when I was coding some kinda "my own language interpreter", and the interpreter itself was huge, that's why I pointed out the memory problems. Your sollution would've been unusable to me.

Also, I've always disliked the CHAIN/several EXEs policies, I prefer having everything in a neat EXE -> but this is just a personal taste

After all, a mid-featured expression evaluator can be coded in less than 60-70 lines (as it has been demonstrated in the challenge).