Hi. Em Qui, 2008-07-17 às 11:56 -0400, Chad Wilson escreveu:
Very simple and to the point. Now I need to dig into the manual and figure out the next simple progression...taking 2 arguments and doing something to them akin to:
roll 1 6
This would roll 1, 6-sided die, or 1d6 in gamer terms and print the result.
import Control.Monad import Random import System.Environment main :: IO () main = do
To get the first two arguments you can use:
(n : s : _) <- getArgs
The randomRIO [2] function is a good option, with replicateM [3] to run more than one dice. read [4] is needed to parse the argument into an Int value. You have to specificy the type of 1, cause randomRIO has to be sure of it.
replicateM (read n) (randomRIO (1 :: Int, read s)) >>= print
[1]: http://haskell.org/ghc/docs/latest/html/libraries/random/System-Random.html [2]: http://haskell.org/ghc/docs/latest/html/libraries/random/System-Random.html#... [3]: http://haskell.org/ghc/docs/latest/html/libraries/base/Control-Monad.html#v%... [4]: http://haskell.org/ghc/docs/latest/html/libraries/base/Prelude.html#v%3Aread Hope it helps. -- Marco Túlio Gontijo e Silva Página: http://marcotmarcot.googlepages.com/ Blog: http://marcotmarcot.blogspot.com/ Correio: marcot@riseup.net XMPP: marcot@jabber.org IRC: marcot@irc.freenode.net Telefone: 25151920 Celular: 98116720 Endereço: Rua Turfa, 639/701 Prado 30410-370 Belo Horizonte/MG Brasil