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Path: ...!feed.opticnetworks.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: olcott <polcott333@gmail.com> Newsgroups: comp.theory Subject: Re: Simplified proof that DDD correctly simulated by HHH does not halt Date: Sun, 9 Jun 2024 13:23:04 -0500 Organization: A noiseless patient Spider Lines: 32 Message-ID: <v44ru8$3m841$3@dont-email.me> References: <v44dle$3i5jo$2@dont-email.me> <v44jvn$3jnc8$3@dont-email.me> <v44qin$3g17f$5@i2pn2.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Sun, 09 Jun 2024 20:23:05 +0200 (CEST) Injection-Info: dont-email.me; posting-host="f8e472f6a5ded880f3c8d2cedf42e75a"; logging-data="3874945"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX181IHZViXGMFkPU48cgF9au" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:WslM1fjaou5D5YNzqfqxaImOews= In-Reply-To: <v44qin$3g17f$5@i2pn2.org> Content-Language: en-US Bytes: 1997 On 6/9/2024 12:59 PM, joes wrote: > Am Sun, 09 Jun 2024 11:07:19 -0500 schrieb olcott: >> typedef void (*ptr)(); // pointer to void function >> 01 void HHH(ptr P, ptr I) >> 02 { >> 03 P(I); >> 04 return; >> 05 } >> 06 07 void DDD(int (*x)()) >> 08 { >> 09 HHH(x, x); >> 10 return; >> 11 } >> 12 13 int main() >> 14 { >> 15 HHH(DDD,DDD); >> 16 } >> 17 > >> In the above Neither DDD nor HHH ever reach their own return statement >> thus never halt. >> Most of my reviewers incorrectly believe that when HH(DD,DD) aborts its >> simulated input that this simulated input halts. You chopped out the mandatory prerequisite. Please go back and prove that you understand what infinite recursion is before proceeding. -- Copyright 2024 Olcott "Talent hits a target no one else can hit; Genius hits a target no one else can see." Arthur Schopenhauer