[Haskell-cafe] need help on exercise

[kasager]

Hi,
  I am working on exercise 12.5 from "Haskell, The Craft of Functional 
Programming, second edition" by Simon Thompson.  It asks to make Int an 
instance in the Visible class.  I have tried multiple ways of doing this 
however I keep receiving the same error messege when I compile my program, 
saying that my types do not match and i have given a (Num a, Visible a) => 
String, when it is supposed to be an Int -> String.  If anyone could help me 
with this issue it would be greatly appreciated.  Thanks, Kelly