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Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: olcott <polcott333@gmail.com> Newsgroups: comp.theory,comp.lang.c,comp.lang.c++ Subject: DDD simulated by HHH cannot possibly halt (Halting Problem) Followup-To: comp.theory Date: Thu, 3 Apr 2025 20:27:15 -0500 Organization: A noiseless patient Spider Lines: 33 Message-ID: <vsnchj$23nrb$2@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Fri, 04 Apr 2025 03:27:16 +0200 (CEST) Injection-Info: dont-email.me; posting-host="9d357f23128165b2da10d3d76512bb2d"; logging-data="2219883"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18KoBP1Nr5Lt52CeZAOGPMm" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:Fcyb1PNaw1wMZ1r0Gxq3ffHNty0= X-Antivirus: Norton (VPS 250403-8, 4/3/2025), Outbound message Content-Language: en-US X-Antivirus-Status: Clean Bytes: 1764 void DDD() { HHH(DDD); return; } Do you really think that anyone knowing the C programming language is too stupid to see that DDD simulated by HHH cannot possibly return? 01 int DD(int (*x)()) 02 { 03 int Halt_Status = HH(x, x); 04 if (Halt_Status) 05 HERE: goto HERE; 06 return Halt_Status; 07 } 08 09 int main() 10 { 11 Output("Input_Halts = ", HH(DD,DD)); 12 } DD simulated by HHH has the same behavior as DDD simulated by HHH. CAR T infusion tomorrow. (drastic cancer treatment) -- Copyright 2025 Olcott "Talent hits a target no one else can hit; Genius hits a target no one else can see." Arthur Schopenhauer