Jenny678 wrote: > Can somebody help me > My Problem is to define a code for: > > >cross 7 -- means 7*7 > >+++++++ > >++ ++ > >+ + + + > >+ + + > >+ + + + > >++ ++ > >+++++++
As always, try to decompose a hard problem into simple steps. It's
probably adequate to represent pictures as
*> type Picture = [String]
then compose your "cross" from six lines. An overlay operator
*> over :: Picture -> Picture -> Picture
is trivial to write. Creating the lines should be easy,
*> replicate :: Int -> a -> [a]
from the Prelude and list comprehensions might help.
> Can I use putString ???
Of course, but you shouldn't. Creating a cross is a seperate step from
putting it on screen. "cross" should probably return a list of Strings
or a single String (think "unlines"). In fact,
*> cross :: Int -> Picture
definitely makes the most sense to me.
Udo.
--
People with great minds talk about ideas.
People with ordinary minds talk about things.
People with small minds talk about other people.
-- Eleanor Roosevelt
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