my_avg list = (accum list) / (length list) ================================
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"?
(/) expects two equally typed arguments and (length list) yields the type 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
Try to check the type of 5 and xx using ":t" at the hugs prompt.
Possibly, I don't know something important, or Hugs is not quite mature?
Haskell does at least allow literal numbers to fit several types.
HTH Christian
P.S. fromIntegral can be used for conversions
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