What version of ghc are you using?
In recent versions ghc doesn't support pattern matching of expressions
like (n+1).
You can rewrite that factorial function as
factorial n = n * factorial (n-1)
instead.
best,
Eugene
On 3 September 2012 22:08, Iwan Awaludin
Dear Sir/Madam I Installed Haskell Platform 2012.2.0.0 for Windows and try to load Stdm.lhs which is downloaded from http://www.dcs.gla.ac.uk/~jtod/discrete-mathematics/Stdm.lhs I have this error: stdm.lhs:1160:14: Parse error in pattern: n + 1 Failed, modules loaded: none.
Is there anything I should do to make it right? Thank you.
-- Iwan Awaludin
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