Subj : Re: cards
To   : comp.programming
From : Willem
Date : Tue Oct 04 2005 10:44 pm

bob@coolgroups.com wrote:
) Roger Willcocks wrote:
)> <bob@coolgroups.com> wrote in message
)> news:1128448274.935279.78050@g47g2000cwa.googlegroups.com...
)> > Let's say you want to iterate through all of the possible combinations
)> > that occur when you choose 7 cards from a fifty two card deck.  Anyone
)> > know the best way to do this?
)>
)> Are the same cards, but in a different order, a different combination?
)
) I'm trying to analyze the Texas Holdem probabilities.

So order doesn't matter, I guess ?

Well then it's real easy:

  for (c1 = 0;    c1 < 52-6; c1++)
   for (c2 = c1+1; c2 < 52-5; c2++)
    for (c3 = c2+1; c3 < 52-4; c3++)
     for (c4 = c3+1; c4 < 52-3; c4++)
      for (c5 = c4+1; c5 < 52-2; c5++)
       for (c6 = c5+1; c6 < 52-1; c6++)
        for (c7 = c6+1; c7 < 52-0; c7++)
         do_something(c1,c2,c3,c4,c5,c6,c7);

If you want a more general routine that can handle different numbers of
cards, that's not much more complex, but quite a bit harder to think of.


SaSW, Willem
-- 
Disclaimer: I am in no way responsible for any of the statements
            made in the above text. For all I know I might be
            drugged or something..
            No I'm not paranoid. You all think I'm paranoid, don't you !
#EOT

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