[Haskell-beginners] making function problem (chapter 6 of Programming in Haskell)

[Roelof Wobben]

----------------------------------------
> To: beginners at haskell.org
> From: es at ertes.de
> Date: Mon, 8 Aug 2011 17:28:08 +0200
> Subject: Re: [Haskell-beginners] making function problem (chapter 6 of Programming in Haskell)
>
> Roelof Wobben <rwobben at hotmail.com> wrote:
>
> > Im not guessing.
> >
> > Im trying to understand what you mean by exponation rules.
> >
> > As far as I can imagaging it cannot be done the same way as you
> > described the sum problem.
>
> Try with multiplication first. If you can do multiplication, then
> exponentiation should be clear.
>
>
> Greets,
> Ertugrul
>
>
> --
> nightmare = unsafePerformIO (getWrongWife >>= sex)
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>
>
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Oke, 

 

Just to be sure.

I only have to use suc and pred ?

 

I think you want something like this :

 

x + 0 = x
x + y = succ x + pred y

 

Roelof