On Sep 13, 2012, at 10:28 AM, Ashley Fowler wrote: > > > ________________________________________ > From: John Clements [cleme...@brinckerhoff.org] > Sent: Thursday, September 13, 2012 1:26 PM > To: Ashley Fowler > Cc: users@racket-lang.org > Subject: Re: [racket] Cube > > On Sep 13, 2012, at 10:22 AM, Ashley Fowler wrote: > >> I have to write a procedure (cube-two X Y) that takes two numeric arguments >> and returns a list of their cubes. >> >> So far I have... >> >> (define cube(lambda(x)(* x x x)))...which takes ONE numeric >> arguments...example below... >> >> (cube 3) ==> ( 27) >> >> >> How could I make it to take two numeric arguments? >> >> For instance... >> >> (cube-two 1 4) ==> (1 64) >> (cube-two 2 5) ==> (8 125) > > Well, it sounds like you've already done a big chunk of the work, by > implementing 'cube'. Your best bet here is to *use* cube in order to define > your cube-two function. > > Are you using the HtDP textbook? This would be a great time to write down a > purpose statement and header. > > John > > > No I don't have a textbook. I just need suggestions on how to start cube 2
You might want to check out How To Design Programs: it's a textbook written by the developers of Racket, and you can read it free online, at http://www.htdp.org/2003-09-26/Book/ It has a *lot* of help with the question: "Help! How do I get started?" John Clements
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