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Date: Mon, 8 Aug 2011 19:18:55 +0100 From: dbeacham@dbeacham.co.uk To: beginners@haskell.org Subject: Re: [Haskell-beginners] making function problem (chapter 6 of Programming in Haskell)
On 08/08/11 16:17, Ertugrul Soeylemez wrote:
Maybe this :
x ^ 0 = 1 x ^ y = x * (y-1) Hi Roelof,
I don't think you're far away - it could just be a typo/lack of care in writing it down. Have you tried putting some actual values into these rules? - that should help you understand what is wrong with what you've written down/get you closer to the correct solution.
For example: (x=2, y=4) 2^4 = 16 != 6 = 2 * 3
David.
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Oke, what Im trying to say it this : 2 ^ 4 = 2 * 2 ^ 3 = 2 * 2 * 2 ^ 2 = 2 * 2 * 2 * 2 ^ 1 = 2 * 2 * 2 * 2 * 2 ^ 0 So the y is on each number one less on each run. So maybe it's x ^ y = x * x ^ y Roelof