On Mon, May 13, 2013 at 02:08:26PM -0800, Christopher Howard wrote: > instance Integral a => Coord2 (CircAppr a) where > > coords2 (CircAppr divns ang rad) = > let dAng = 2 * pi / (fromIntegral divns) in > let angles = map (* dAng) [0..divns] in > undefined -- To be coded...
Your definition of "angles" forces "dAng" to be of type "a". Then in order to define "dAng" as the result of a "/" there must be a "Fractional" instance for "a". Hope that helps. Tom _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
