I have been trying Hugs98 This is the average of floats list calculation program: ================================ accum :: [Float] -> Float accum list = foldr (+) 0 list my_avg list = (accum list) / (length list) ================================ While loading it I got the compiler message: ERROR "U:\slav\FP\Avg.hs":11 - Type error in application *** Expression : accum list / length list *** Term : accum list *** Type : Float *** Does not match : Int Why "accum list" should match to "Int"? When I try to replace (length list) with number - it works. ================================ my_avg list = (accum list) / 5 --works fine ================================ xx = 5 my_avg list = (accum list) / xx --doesn't work -- same message as above ================================ Possibly, I don't know something important, or Hugs is not quite mature? Thank you. Slav.
