import "Prelude"

distance (x1,y1) (x2,y2) = let dx = x1-x2
                               dy = y1-y2
                           in sqrt (dx*dx + dy*dy) print x1
--
5:31-5:35: Constrain Real ((a -> <Proc> ()) -> <e> b -> <d> c) contains free variables not mentioned in the type of the value.
5:58-5:60: Expected <a> got <b>.