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Path: news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: Richard Heathfield <rjh@cpax.org.uk> Newsgroups: comp.theory Subject: Re: Overcoming the proof of undecidability of the Halting Problem by a simple example in C Date: Sat, 17 May 2025 05:09:42 +0100 Organization: Fix this later Lines: 29 Message-ID: <1009266$1bg1$4@dont-email.me> References: <1005jsk$3akrk$1@dont-email.me> <bc6f0f045212bdfb7f7d883426873a09e37789ea@i2pn2.org> <1005u6v$3cpt2$1@dont-email.me> <1005v0p$3b07v$1@dont-email.me> <10063u0$3dmiv$1@dont-email.me> <1006on8$3l9t7$1@dont-email.me> <1007kgq$3qb7l$9@dont-email.me> <1007mp8$3r37u$1@dont-email.me> <1008jgl$j63$3@dont-email.me> <1008o88$1bg1$1@dont-email.me> <1008s18$5uqc$1@dont-email.me> <1008t5g$1bg1$2@dont-email.me> <1008tr4$66kl$2@dont-email.me> <100901g$1bg1$3@dont-email.me> <10090vl$6mor$2@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Sat, 17 May 2025 06:09:42 +0200 (CEST) Injection-Info: dont-email.me; posting-host="445299cc285a28acbbdaee421187330b"; logging-data="44545"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+PBeu+Zc6fm8NdbqvPmiLUpd9CFikxb/dTi9NNWvllfg==" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:KQAlyh5NrBDGVCTBHDWVekkQW9s= In-Reply-To: <10090vl$6mor$2@dont-email.me> Content-Language: en-GB On 17/05/2025 04:49, olcott wrote: <snip> > It is possible to create a C function that > simulates the source-code of other C functions. > The essential idea of this is a C interpreter. No. You clearly have no idea what an interpreter is. A C interpreter translates C, just as a C compiler translates C, the difference being that the compiler writes down the translation (like a book translator in a publishing house) while the interpreter says it out loud, so to speak (like an interpreter at a United Nations meeting). In each case, the input is C, not machine code. > The actual HHH uses x86 emulation that is way > over most peoples heads. Clearly not a C interpreter, then. -- 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