2) No.
1) That is your syntax error. You should have "ranNoInt = <something>".
The =<< operator is meant for the definition of the function.
Try this:
import System
import System.Random
main = readFile "C:\\Documents and Settings\\myHeader.txt" >>=
myExtractSentence >>= putStrLn
myExtractSentence file = do
ranNoInt <- ranNo
return $ ary !! ranNoInt
where
ranNo = randomRIO (0, n-1)
n = length ary
ary = lines file
On Tue, Oct 26, 2010 at 2:36 AM, Sok H. Chang
Hello, everyone.
I need help for my first code. I write this code for extracting one sentence from text file.
The code is
----------------------------------------------------------------------------------------------------------------------- import System import System.Random
main = do myHeader <- readFile "C:\\Documents and Settings\\myHeader.txt" putStrLn $ myExtractSentence myHeader myExtractSentence file = ary !! ranNoInt where ranNoInt =<< ranNo -- *mark ranNo = randomRIO (0, n-1) n = length ary ary = lines file
---------------------------------------------------------------------------------------------------------------------- There are two questions.
1) I've got following error message. Haskell>ghc --make Test01.hs -o Test [1 of 1] Compiling Main ( Test01.hs, Test01.o )
Test01.hs:10:9: parse error (possibly incorrect indentation)
How can fix it?
2) Is it OK at "*mark" line?
Thank you.
S. CHANG
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