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Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Tim Rentsch <tr.17687@z991.linuxsc.com> Newsgroups: comp.lang.c Subject: Re: question about nullptr Date: Tue, 09 Jul 2024 04:32:50 -0700 Organization: A noiseless patient Spider Lines: 40 Message-ID: <86cynmajh9.fsf@linuxsc.com> References: <v6bavg$3pu5i$1@dont-email.me> <20240706054641.175@kylheku.com> <v6bfi1$3qn4u$1@dont-email.me> <l9ciO.7$cr5e.2@fx05.iad> <877cdyuq0f.fsf@bsb.me.uk> <2ckiO.19403$7Ej.4487@fx46.iad> <87plrpt4du.fsf@bsb.me.uk> <9bCiO.7108$sXW9.3805@fx41.iad> <877cdwu9s1.fsf@nosuchdomain.example.com> <20240708222804.00001654@yahoo.com> <v6hotk$11nib$2@dont-email.me> <20240709104848.00005732@yahoo.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Injection-Date: Tue, 09 Jul 2024 13:32:52 +0200 (CEST) Injection-Info: dont-email.me; posting-host="4404f50b61bba69374b6468dfb9554fc"; logging-data="1449839"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19MYFkbm1wtEIM6cze6xzQ9hAn2Y/s/kTg=" User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.4 (gnu/linux) Cancel-Lock: sha1:4R/mQNIe3cDfyB45uAha+Qk0XGM= sha1:i3/xxCPhcJoCWKTsMypEDu6ErCU= Bytes: 2531 Michael S <already5chosen@yahoo.com> writes: > On Mon, 8 Jul 2024 15:23:47 -0700 > "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> wrote: > >> On 7/8/2024 12:28 PM, Michael S wrote: >> >>> On Sun, 07 Jul 2024 15:17:34 -0700 >>> Keith Thompson <Keith.S.Thompson+u@gmail.com> wrote: >>> >>>> I just about always use NULL, not 0, when I want a null pointer >>>> constant. Similarly, I use '\0', not 0, when I want a null >>>> character, 0.0 when I want a floating-point zero, and false when I >>>> want a Boolean zero. I just like being explicit. >>> >>> Pointer: I very rarely use NULL. >>> Character: I never use '\0'. >> >> Not even something like: >> >> #define CLINE 128 >> >> char x[CLINE] = { '\0' }; >> >> ? >> >> ;^) > > I see nothing special about your case. {0} is the most appropriate. Any use of '\0' almost always strikes me as an affectation. It's like people want to somehow pretend that it's not the same as just 0. > And, BTW, I never use #define for integer constants. What do you do if you need to define a compile-time constant whose value is outside the range of signed int? With the understanding that the context is C as it is now, and not C++ or some imagined other language.