Re: starting forth ch4 problem 5

Elizabeth D Rather <erather@[EMAIL PROTECTED]
> writes:
>Ian's advice to use ?DO when the index might be zero is the correct 
>approach.

In Gforth you can also use +DO instead; you will notice a difference
when you try

-1 stars

The ?DO version produces a huge number of stars, because it counts up
until the index reaches -1 (through wraparound).  In contrast, the +DO
version prints no stars.

- anton
-- 
M. Anton Ertl  http://www.complang.tuwien.ac.at/anton/home.html
comp.lang.forth FAQs: http://www.complang.tuwien.ac.at/forth/faq/toc.html
     New standard: http://www.forth200x.org/forth200x.html
   EuroForth 2008:
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