Question: Haskell: Write a function char_to_int char that takes a character representing a number between zero and nine, and returns the corresponding integer. So char_to_int '1'

Haskell:

Write a function char_to_int char that takes a character representing a number between zero and nine, and returns the corresponding integer.

So char_to_int '1' should return the integer 1, and char_to_int '2' should return 2, and so on.

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