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Re: srand(0)

From Keith Thompson <Keith.S.Thompson+u@gmail.com>
Newsgroups comp.lang.c, sci.math.num-analysis
Subject Re: srand(0)
Date 2026-02-19 14:39 -0800
Organization None to speak of
Message-ID <87ikbsgxy2.fsf@example.invalid> (permalink)
References (10 earlier) <864inyj6ug.fsf@linuxsc.com> <20260203163708.0000459e@yahoo.com> <86y0kqfq85.fsf@linuxsc.com> <10n47bi$2io53$3@dont-email.me> <10n6jgg$3bj7e$1@dont-email.me>

Cross-posted to 2 groups.

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David Brown <david.brown@hesbynett.no> writes:
[...]
> As a deterministic function, a PRNG will obviously follow the pattern
> of its generating function.  But the aim is to have no /discernible/
> pattern.  The sequence 3, 4, 2, 1, 1, 7, 0, 6, 7 has no pattern that
> could be identified without knowledge of where they came from - and
> thus no way to predict the next number, 9, in the sequence.  But there
> is a pattern there - it's the 90th - 100th digits of the decimal
> expansion of pi.
[...]

A Google search for 342117067 gives numerous hits referring to the
digits of pi.

-- 
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
void Void(void) { Void(); } /* The recursive call of the void */

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Re: srand(0) Tim Rentsch <tr.17687@z991.linuxsc.com> - 2026-01-07 08:41 -0800
  Re: srand(0) Michael S <already5chosen@yahoo.com> - 2026-01-08 01:06 +0200
    Re: srand(0) Tim Rentsch <tr.17687@z991.linuxsc.com> - 2026-02-03 05:26 -0800
      Re: srand(0) Michael S <already5chosen@yahoo.com> - 2026-02-03 16:37 +0200
        Re: srand(0) Tim Rentsch <tr.17687@z991.linuxsc.com> - 2026-02-17 23:47 -0800
          Re: srand(0) Tristan Wibberley <tristan.wibberley+netnews2@alumni.manchester.ac.uk> - 2026-02-18 11:21 +0000
            Re: srand(0) David Brown <david.brown@hesbynett.no> - 2026-02-19 10:01 +0100
              Re: srand(0) James Kuyper <jameskuyper@alumni.caltech.edu> - 2026-02-19 14:33 -0500
                Re: srand(0) David Brown <david.brown@hesbynett.no> - 2026-02-19 20:47 +0100
                Re: srand(0) James Kuyper <jameskuyper@alumni.caltech.edu> - 2026-02-20 16:01 -0500
                Re: srand(0) David Brown <david.brown@hesbynett.no> - 2026-02-21 11:09 +0100
              Re: srand(0) Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-02-19 14:39 -0800
                Re: srand(0) David Brown <david.brown@hesbynett.no> - 2026-02-20 09:16 +0100
                Re: srand(0) Paul <nospam@needed.invalid> - 2026-02-23 08:32 -0500
                Re: srand(0) David Brown <david.brown@hesbynett.no> - 2026-02-23 16:05 +0100
                Re: srand(0) Michael S <already5chosen@yahoo.com> - 2026-02-23 19:59 +0200
                Re: srand(0) David Brown <david.brown@hesbynett.no> - 2026-02-23 20:06 +0100
                Re: srand(0) Paul <nospam@needed.invalid> - 2026-02-23 15:24 -0500
                Re: srand(0) Axel Reichert <mail@axel-reichert.de> - 2026-02-24 07:08 +0100
                Re: srand(0) David Brown <david.brown@hesbynett.no> - 2026-02-24 10:24 +0100
                Re: srand(0) Axel Reichert <mail@axel-reichert.de> - 2026-02-26 19:13 +0100

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