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Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: Richard Heathfield <rjh@cpax.org.uk> Newsgroups: comp.lang.c Subject: Re: DD simulated by HHH cannot possibly halt (Halting Problem) Date: Sat, 5 Apr 2025 20:12:24 +0100 Organization: Fix this later Lines: 17 Message-ID: <vsrvao$2sut0$3@dont-email.me> References: <vsnchj$23nrb$2@dont-email.me> <vsngo6$26agq$1@dont-email.me> <vsnh44$26c94$3@dont-email.me> <vsnht7$26agq$2@dont-email.me> <vsnlvv$2h8pt$1@dont-email.me> <vsnnb5$2g4cd$2@dont-email.me> <vsnnug$2h8pt$2@dont-email.me> <vsnou2$2g4cd$5@dont-email.me> <vspqmt$o89d$1@dont-email.me> <vsq97g$19eo9$1@dont-email.me> <vsqhov$1hl94$1@dont-email.me> <vsqmth$1mglg$2@dont-email.me> <vsrk17$2le7u$1@dont-email.me> <vsrlh7$2n0kg$1@dont-email.me> <vsrrnl$2ssgf$3@dont-email.me> <vsrtp0$2sut0$2@dont-email.me> <vsrun6$2ssgf$5@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Sat, 05 Apr 2025 21:12:24 +0200 (CEST) Injection-Info: dont-email.me; posting-host="9ba5473c49a0346d8825952a0365662d"; logging-data="3046304"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/wVHZXRYXKMDQbWSxJrdCWBFh0uWuYO2VCkexgDIFNfA==" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:8vfEQpO5XbCGbxew7snAL13b638= In-Reply-To: <vsrun6$2ssgf$5@dont-email.me> Content-Language: en-GB Bytes: 2136 On 05/04/2025 20:01, olcott wrote: > As any C programmer can see DDD simulated by HHH would cause > any correct simulator to get stuck in recursive simulation As any C programmer can see, any C compiler is free to reject your code, which makes no attempt whatsoever to analyse the behaviour of the input program. That, of course, is not surprising. What /is/ surprising is that you have managed to drag this joke out for so long. -- Richard Heathfield Email: rjh at cpax dot org dot uk "Usenet is a strange place" - dmr 29 July 1999 Sig line 4 vacant - apply within