Church Numerals in haskell

I am trying to print church numerals in haskell using the definions:

0 := λfx.x
1 := λfx.f x

Haskell code:

c0 = \f x -> x
c1 = \f x -> f x

When I enter it in the haskell console I get an error which says

    test> c1

    <interactive>:1:0:
    No instance for (Show ((t -> t1) -> t -> t1))
      arising from a use of `print' at <interactive>:1:0-1
    Possible fix:
      add an instance declaration for (Show ((t -> t1) -> t -> t1))
    In a stmt of an interactive GHCi command: print it

I am not able to exactly figure out what error says.

Thank you!