Error about “type signature with no binding”

Question

I have a problem with ASCII in Haskell.

fromEnum :: Char -> Int
toEnum :: Int -> Char

offset :: Int
offset = fromEnum \'A\' - fromEnum \'a\'

toUpper ::          


        

Answer 1

fromEnum and toEnum are standart functions

please try this:

offset :: Int
offset = fromEnum 'A' - fromEnum 'a'

toUpper :: Char -> Char
toUpper ch = toEnum (fromEnum ch + offset)