Question

I have created a piece of code this:

intToDigit :: Char -> Int
ord :: Char -> Int
intToDigit c = ord c - ord 'a'

However, when I run it I get this error message:

ChangeVowels.hs:2:1:
The type signature for `ord’ lacks an accompanying binding

ChangeVowels.hs:4:16: Not in scope: `ord’

ChangeVowels.hs:4:24: Not in scope: `ord’

I tried it with Import data.char but that doesnt work either.

Answer 1

You need to provide an implementation for the function ord. Here, you have given a signature for ord, but no implementation.

Or you can use Haskell’s own ord function, that is Char.ord.