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From: dbush <dbush.mobile@gmail.com>
Newsgroups: comp.theory,comp.lang.c,comp.lang.c++
Subject: Re: Everyone makes sure to avoid addressing this exact point
Date: Tue, 11 Mar 2025 18:31:57 -0400
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On 3/11/2025 6:15 PM, olcott wrote:
> typedef void (*ptr)();
> int HHH(ptr P);
> 
> void Infinite_Loop()
> {
>    HERE: goto HERE;
>    return;
> }
> 
> void Infinite_Recursion()
> {
>    Infinite_Recursion();
>    return;
> }
> 
> void DDD()
> {
>    HHH(DDD);
>    return;
> }
> 
> int DD()
> {
>    int Halt_Status = HHH(DD);
>    if (Halt_Status)
>      HERE: goto HERE;
>    return Halt_Status;
> }
> 
> When HHH correctly emulates N steps of the above
> functions none of them can possibly reach their own
> "return" instruction and terminate normally.
> 

Changing the input is not allowed.