Re: Every D(D) simulated by H presents non-halting behavior to H ###

On 5/12/2024 11:54 PM, immibis wrote:

On 10/05/24 19:55, Alan Mackenzie wrote:

[ Followup-To: set ]
>
In comp.theory olcott <polcott333@gmail.com> wrote:
>
[ .... ]
>
I've tried out your much spammed code on GCC (see below).  It is clear
you have never built or run this code, which ironically can't reach Line
06.  It can't even reach line 00.
>

Richard tried to get away with D never simulated by H as an example
of D simulated by H:

>

Message-ID: <v0ummt$2qov3$2@i2pn2.org>
On 5/1/2024 7:28 PM, Richard Damon wrote:

>

*That people say they know I am wrong yet will not show the detailed*
*steps of how I am wrong indicates that they are probably liars*

>
You have said, or at least implied that your code fragment is runnable.
I think you are the liar, here.
>

00 int H(ptr x, ptr x)  // ptr is pointer to int function
01 int D(ptr x)
02 {
03   int Halt_Status = H(x, x);
04   if (Halt_Status)
05     HERE: goto HERE;
06   return Halt_Status;
07 }
08
09 int main()
10 {
11   H(D,D);
12 }

>
>
.  These are the diagnostics generated by GCC:
>

And the halting problem is about Turing machines, anyway.

 It is sufficiently isomorphic to the Linz machines.