Path: ...!weretis.net!feeder9.news.weretis.net!news.quux.org!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: Mikko Newsgroups: comp.theory Subject: Re: Every sufficiently competent C programmer knows --- posthumous reviewers Date: Sun, 16 Mar 2025 12:48:32 +0200 Organization: - Lines: 59 Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Sun, 16 Mar 2025 11:48:33 +0100 (CET) Injection-Info: dont-email.me; posting-host="2e28bd486efac3f7270b2c3baf822b20"; logging-data="1727104"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+jmk5yWbH1pI3NHQTlnqWr" User-Agent: Unison/2.2 Cancel-Lock: sha1:+BhI+AWxJIHGRtp38vla+GUzR+k= Bytes: 3392 On 2025-03-15 21:54:31 +0000, olcott said: > On 3/15/2025 5:24 AM, Mikko wrote: >> On 2025-03-13 20:56:22 +0000, olcott said: >> >>> On 3/13/2025 4:22 AM, Mikko wrote: >>>> On 2025-03-13 00:36:04 +0000, olcott said: >>>> >>>>> >>>>> void DDD() >>>>> { >>>>>    HHH(DDD); >>>>>    return; >>>>> } >>>>> >>>>> int DD() >>>>> { >>>>>    int Halt_Status = HHH(DD); >>>>>    if (Halt_Status) >>>>>      HERE: goto HERE; >>>>>    return Halt_Status; >>>>> } >>>>> >>>>> When HHH correctly emulates N steps of the >>>>> above functions none of them can possibly reach >>>>> their own "return" instruction and terminate normally. >>>> >>>> Nevertheless, assuming HHH is a decider, Infinite_Loop and Infinite_Recursion >>>> specify a non-terminating behaviour, DDD specifies a terminating behaviour >>> >>> _DDD() >>> [00002172] 55         push ebp      ; housekeeping >>> [00002173] 8bec       mov  ebp,esp  ; housekeeping >>> [00002175] 6872210000 push 00002172 ; push DDD >>> [0000217a] e853f4ffff call 000015d2 ; call HHH(DDD) >>> [0000217f] 83c404     add  esp,+04 >>> [00002182] 5d         pop  ebp >>> [00002183] c3         ret >>> Size in bytes:(0018) [00002183] >>> >>> What is the sequence of machine language >>> instructions of DDD emulated by HHH such that DDD >>> reaches its machine address 00002183? >>> >>> Any failure to answer with the sequence of machine >>> addresses will be construed as >>> YOU KNOW THAT YOU ARE LYING OR DON'T UNDERSTAND THE QUESTON >> >> That a question is not answered is not a lie. > > It is when the claim that I am incorrect is repeated > many many times with many requests for supporting > reasoning showing how I am wrong are totally ignored. Not according to any dictionary I have seen. -- Mikko