<html>
<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<div class="moz-cite-prefix">Quentin Le Guennec schreef op 5-2-2015
om 14:34:<br>
</div>
<blockquote
cite="mid:CANMnDVPgRLo=NcHfw2j9K78N2srHdP74p5fCw2jez=-14f9phA@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_default"
style="font-family:garamond,serif;font-size:small">Hey,</div>
<div class="gmail_default"
style="font-family:garamond,serif;font-size:small"><br>
</div>
<div class="gmail_default"
style="font-family:garamond,serif;font-size:small">I read your
mail on haskell-cafe mailing list. What is CIS course excatly?
Could you send me a link to the exercises? Thanks.</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">2015-02-05 8:48 GMT+01:00 Roelof Wobben
<span dir="ltr"><<a moz-do-not-send="true"
href="mailto:r.wobben@home.nl" target="_blank">r.wobben@home.nl</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> Hello, <br>
<br>
I have to do this : <br>
<br>
Exercise 1 We need to first find the digits of a number.
Define the<br>
functions<br>
toDigits :: Integer -> [Integer]<br>
toDigitsRev :: Integer -> [Integer]<br>
toDigits should convert positive Integers to a list of
digits. (For 0 or<br>
negative inputs, toDigits should return the empty list.)
toDigitsRev<br>
should do the same, but with the digits reversed.<br>
Example: toDigits 1234 == [1,2,3,4]<br>
Example: toDigitsRev 1234 == [4,3,2,1]<br>
Example: toDigits 0 == []<br>
Example: toDigits (-17) == []<br>
<br>
<br>
I have this so far : <br>
<br>
-- | convert a number to a array in pieces where a
negative number will be a empty array. <br>
toDigits :: Integer -> [Integer]<br>
toDigits n <br>
| n < 0 : []<br>
| otherwise : n/10 : []<br>
<br>
-- | Main entry point to the application.<br>
module Main where<br>
<br>
-- | The main entry point.<br>
main :: IO ()<br>
main = do<br>
toDigits 123 <br>
<br>
but now I see this error message : <br>
<br>
<div>src/Main.hs@5:3-5:4 </div>
<div><span>parse error on input | <br>
<br>
This is not homework because I do this as a
self-study.<span class="HOEnZb"><font color="#888888"><br>
<br>
Roelof<br>
<br>
</font></span></span>
<div style="font-size:14px"><span><br>
</span></div>
</div>
<br>
<br>
<br>
<br>
<br>
</div>
<br>
_______________________________________________<br>
Haskell-Cafe mailing list<br>
<a moz-do-not-send="true"
href="mailto:Haskell-Cafe@haskell.org">Haskell-Cafe@haskell.org</a><br>
<a moz-do-not-send="true"
href="http://www.haskell.org/mailman/listinfo/haskell-cafe"
target="_blank">http://www.haskell.org/mailman/listinfo/haskell-cafe</a><br>
<br>
</blockquote>
</div>
<br>
<br clear="all">
<div><br>
</div>
-- <br>
<div class="gmail_signature">
<div dir="ltr">Quentin Le Guennec</div>
</div>
</div>
</blockquote>
<br>
Here you can find the answer :
<a class="moz-txt-link-freetext" href="http://www.seas.upenn.edu/~cis194/spring13/index.html">http://www.seas.upenn.edu/~cis194/spring13/index.html</a><br>
<br>
Roelof<br>
<br>
</body>
</html>