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On 2024-05-23 13:09:01 +0000, olcott said:typedef int (*ptr)(); // ptr is pointer to int function in C
On 5/23/2024 3:23 AM, Mikko wrote:That is possible. What you said is scattered over so many messagesOn 2024-05-22 14:59:24 +0000, olcott said:>
>On 5/22/2024 3:50 AM, David Brown wrote:>On 21/05/2024 22:13, Keith Thompson wrote:>David Brown <david.brown@hesbynett.no> writes:>
[...]However, my point was that the common excuse of "I hate this crime so[...]
much I lashed out" is not a valid excuse.
>
And you could have made that point without accompanying it by a long
article about various kinds of child abuse in a newsgroup that's
supposed to be about C.
>
You didn't have to let yourself be trolled.
>
I don't consider James' post to be trolling. But of course that in itself does not mean it is appropriate to reply here. However, I replied to that post in the group (rather than email) because it seemed to me that a point I had made previously needed clarification.
>
As has been pointed out by others, topicality in this thread was doomed from the first post. I'd be happier if Olcott had never cross-posted here, but we can't change that.
>
*Someone could simply answer the question instead of*
*spending countless messages on dodging the question*
>
For every H/D pair matching the following template where
H is a pure function:
>
Does any D correctly simulated by H reach its own line 06 and
halt or does the fact that D remains stuck in recursive simulation
prevent that?
>
typedef int (*ptr)(); // ptr is pointer to int function in C
00 int H(ptr p, ptr i);
01 int D(ptr p)
02 {
03 int Halt_Status = H(p, p);
04 if (Halt_Status)
05 HERE: goto HERE;
06 return Halt_Status;
07 }
08
09 int main()
10 {
11 H(D,D);
12 return 0;
13 }
>
It is trivial to see that for every H/D pair of the infinite
set of H/D pairs that match the above template that
>
D correctly simulated by H cannot possibly reach its own final
state at line 06 and halt because D correctly simulated by
H remains stuck in recursive simulation.
>
This provides the basis for simulating termination analyzer H to
correctly determine that the halting problem's counter-example
input D cannot possibly halt.
Someone already pointed out that the question is ill-posed (undefined
and insonsistently used symbols). No reason to expect any other answer.
>
That assessment can only come from not carefully looking at what I said.
It is dead obvious that D correctly simulated by H remains stuck in
recursive simulation thus cannot possibly reach its own line 06 and
halt.
that nobody can be expedted to carefully look at all of them.
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