[CoLoCo] dice rolls in C

[Kenneth D. Weinert]

change Array.new(13)  to Array.new(21)

13 = 6 + 6 + 1 -- the one is because of the zero base.

On Fri, 2008-02-08 at 21:28 -0700, Jim Hutchinson wrote:
> On Feb 5, 2008 1:30 PM, Dale K. Hawkins <dkhawk at gmail.com> wrote:
> > The Ruby version FWIW:
> >
> > ============================8<================================
> >
> > # seed the random number generator
> > srand
> >
> > # create the output array initialized to zeros (too big because 0 and 1 are
> > invalid input; so sue me)
> >  totals = Array.new(13) { 0 }
> >
> > # run 100,000 times (this number can be much larger if you want; Ruby
> > supports automatically grow a number.  Speed does start to be an issue
> > however.
> > # The underscores help readability, but are unnecessary
> >  # the code inside the {}'s is repeatedly run
> > # rand(6) returns a result in the range 0..5 inclusive so we add 1
> > # (rand(6) + 1) is one die, we need two
> > 100_000.times { totals[(rand(6) + 1) + (rand(6) + 1) ] += 1 }
> >
> > # show some output....
> > totals.each_with_index { | t, i | puts "#{t}: #{i}" }
> >
> > ============================8<================================
> >
> > -Dale
> >
> 
> Thanks for sharing this. I finally had a chance to try it. Much easier
> to work with than the C program. No compiling or anything. However, it
> does seem a bit slower. 10 million rolls in the C program took about a
> second. I changed this to 10 million and it took about 15 seconds. 10
> billion rolls in the C program took about 15 mins. I'm assuming then
> that 10 billion in the ruby program would take around 15 times as
> long.
> 
> Also, if i wanted to roll 10 sided dice (number 0-9 for totals of
> 0-18) what would I change? I tried changing the 6s to 10s but got
> errors.
> 
> -- 
> Please avoid sending me Word or PowerPoint attachments.
> See http://www.gnu.org/philosophy/no-word-attachments.html
> 
-- 
Ken Weinert
http://quarter-flash.com

-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
Url : https://lists.ubuntu.com/archives/ubuntu-us-co/attachments/20080208/f6d5a54e/attachment-0001.pgp