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  • Re: Why I need to cross-post to comp.lang.c

    From Mikko@21:1/5 to olcott on Fri May 9 10:01:47 2025
    On 2025-05-09 03:01:40 +0000, olcott said:

    On 5/8/2025 9:23 PM, Keith Thompson wrote:
    Richard Damon <[email protected]> writes:
    On 5/8/25 7:53 PM, olcott wrote:
    [...]
    void DDD()
    {
    � HHH(DDD);
    � return;
    }
    We don't need to look at any of my code for me
    to totally prove my point. For example when
    the above DDD is correctly simulated by HHH
    this simulated DDD cannot possibly reach its own
    "return" instruction.

    And thus not correctly simulatd.

    Sorry, there is no "OS Exemption" to correct simulaiton;.

    Perhaps I've missed something. I don't see anything in the above that
    implies that HHH does not correctly simulate DDD. Richard, you've read
    far more of olcott's posts than I have, so perhaps you can clarify.

    If we assume that HHH correctly simulates DDD, then the above code is
    equivalent to:

    void DDD()
    {
    DDD();
    return;
    }

    which is a trivial case of infinite recursion. As far as I can tell,
    assuming that DDD() is actually called at some point, neither the
    outer execution of DDD nor the nested (simulated) execution of DDD
    can reach the return statement. Infinite recursion might either
    cause a stack overflow and a probable program crash, or an unending
    loop if the compiler implements tail call optimization.

    I see no contradiction, just an uninteresting case of infinite
    recursion, something that's well understood by anyone with a
    reasonable level of programming experience. (And it has nothing to
    do with the halting problem as far as I can tell, though of course
    olcott has discussed the halting problem elsewhere.)

    Richard, what am I missing?

    *****
    Now you are seeing what I was talking about.
    Now you are seeing why I needed to cross post
    to comp.lang.c

    What were you told in comp.lang.c that you were not told in comp.theory?

    --
    Mikko

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  • From Mikko@21:1/5 to Keith Thompson on Sat May 10 10:11:04 2025
    On 2025-05-09 09:43:16 +0000, Keith Thompson said:

    Mikko <[email protected]> writes:
    On 2025-05-09 03:01:40 +0000, olcott said:
    [SNIP]
    What were you told in comp.lang.c that you were not told in comp.theory?

    Mikko, olcott posted in comp.lang.c, but he set followups to
    comp.theory.

    You ignored the followup and effectively reposted his entire article to comp.lang.c again.

    Don't do that.

    You are right, I didn't see the followups to header. My news reader
    program doesn't show it and apparently does not use, either.

    --
    Mikko

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