I think...

... that the problem is: - if I must write my own definitions, like: inc :: Integer -> Integer inc n = n+1 in a file, and this file is a ".hs" file, so how can I write an ".hs" file? - my Hug's prompt, when I start it, is "Prelude>". If Prelude is an ".hs" file, and if that definitions were writed in "Incr.hs" file, my prompt must be "Incr>"? Thank you very much! But the manuals files I downloaded don't explain it... Best regards, Pedro. ----- Original Message ----- From: Pedro L. P. Dias To: Hans Aberg Sent: Thursday, July 25, 2002 8:08 PM Subject: Re: Problems...

Dear Professor Hans Aberg:

Thank you for your answer! 'Sorry to bother you again... I found a Hugs manual, "The Hugs 98 User Manual", and it describes "module". So, I wrote:

module Fact where fact :: Integer -> Integer fact n = product [1..n]

because this is the example showed at page 8 of that manual. But, unfortunately, another error message appears: "cannot find module 'Fact' ". I understood, from your e-mail and the manual, that I must create an ".hs" file with my own definitions; so, how can I do this?

Thank you very much (again!). Best regards, Pedro.

----- Original Message ----- From: Hans Aberg To: Pedro L. P. Dias Cc: Sent: Thursday, July 25, 2002 1:36 PM Subject: Re: Problems...

...

At 10:31 -0300 2002/07/25, Pedro L. P. Dias wrote: I start Hugs, and, at the line command "prelude>", when I digit, for example, "add x y = x + y", an error message appear: "...unexpected '='". Also, when I digit (other example) "inc n = n + 1", the error message is "undefined variable inc",

Dig-it, Hugs is hooked up so that definitions must be in a file. So put the stuff in a file and then load that file.

Hans Aberg