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On 5/17/2024 2:25 AM, Fred. Zwarts wrote:Which, since I posted over two weeks ago how to do it in C, means that you don't have the needed knowledge of the C programming language, or about what truth actually is. THAT is now self-evidently true.Op 17.mei.2024 om 03:15 schreef olcott:It is self-evidently true to anyone having sufficient knowledgeThe following is self-evidently true on the basis of the>
semantics of the C programming language.
>
typedef int (*ptr)(); // ptr is pointer to int function
00 int H(ptr x, ptr x);
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 return 0;
13 }
>
In the above case a simulator is an x86 emulator that correctly
emulates at least one of the x86 instructions of D in the order
specified by the x86 instructions of D.
>
This may include correctly emulating the x86 instructions of H
in the order specified by the x86 instructions of H thus calling
H(D,D) in recursive simulation.
>
Any H/D pair matching the above template where
D(D) is simulated by the same H(D,D) that it calls
cannot possibly reach its own line 06 and halt.
>
*This is a simple software engineering verified fact*
>
Note that olcott defines 'verified fact' as 'proven fact', but he is unable to show the proof. So, it must be read as 'my belief'.
of the semantics of the C programming language.
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