28 Dec
2010
28 Dec
'10
6:22 p.m.
Hi John I'm not sure it can work properly in its current form. If this is the code that's been posted to the list before, it was originally a calculator with a stepper reduced a calculation a term at at time: input> (+ 3 (- 5 1)) ans> (+ 3 4) "Do another step (y/n) or rollback (r)? :" input> y ans> 7 However once "let" was added, I'm not convinced the evalStep is right as I think it works too greedily and stops evaluating a term at a time, and instead evaluates all sub-terms. Best wishes Stephen