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Re: About Flibble

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From Keith Thompson <Keith.S.Thompson+u@gmail.com>
Newsgroups comp.lang.c++
Subject Re: About Flibble
Date Wed, 18 Jan 2023 15:30:56 -0800
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David Brown <david.brown@hesbynett.no> writes:
> On 18/01/2023 21:11, Chris M. Thomasson wrote:
>> On 1/18/2023 12:00 PM, Scott Lurndal wrote:
>
>>> Or using uninitialized variables, particularly in
>>> functions.   Could work for weeks, then the program
>>> takes a different path and the stack contains a
>>> value that causes a crash.
>> True. Well, so far, I don't think I have a problem. MSVC is pretty
>> good at flagging uninitialized variables, and I have a habit of
>> always initializing them.
>> int x = 0;
>> instead of:
>> int x;
>
> That's a /really/ bad idea (unless you actually /want/ x to be 0, of
> course).  It is bad precisely because it stops the compiler from
> warning you when you have forgotten to put a real value in the
> variable.
>
> Get in the habit of declaring local variables only when you have
> something useful to put in them, and initialising them at that point. 
> But if you must declare a variable before you have an initial value,
> do not artificially initialise it - you are just making it harder for
> the tools to find your bugs.

Or initialize it with some recognizably invalid value, if there is such
a value for the type.

Leaving it uninitialized helps the compiler diagnose errors.
Initializing it with recognizable garbage helps with run-time debugging.

-- 
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
Working, but not speaking, for XCOM Labs
void Void(void) { Void(); } /* The recursive call of the void */

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Thread

About Flibble Mr Flibble <flibble@reddwarf.jmc.corp> - 2023-01-02 01:22 +0000
  Re: About Flibble "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2023-01-02 18:39 +0100
    Re: About Flibble Mr Flibble <flibble@reddwarf.jmc.corp> - 2023-01-02 18:08 +0000
  Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-02 21:41 -0800
    Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-02 21:43 -0800
      Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-02 21:44 -0800
  Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-04 00:59 -0800
  Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-11 23:13 -0800
    Re: About Flibble Stuart Redmann <DerTopper@web.de> - 2023-01-13 07:19 +0100
      Re: About Flibble Muttley@dastardlyhq.com - 2023-01-13 10:15 +0000
      Re: About Flibble Manu Raju <MR@invalid.invalid> - 2023-01-13 14:29 +0000
      Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-13 13:43 -0800
        Re: About Flibble Muttley@dastardlyhq.com - 2023-01-14 09:52 +0000
          Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-14 14:44 -0800
            Re: About Flibble David Brown <david.brown@hesbynett.no> - 2023-01-16 11:37 +0100
              Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-16 11:45 -0800
                Re: About Flibble Mr Flibble <flibble@reddwarf.jmc.corp> - 2023-01-16 20:49 +0000
                Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-18 00:02 -0800
                Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-18 00:04 -0800
              Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-16 11:52 -0800
                Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-16 11:57 -0800
        Re: About Flibble David Brown <david.brown@hesbynett.no> - 2023-01-16 11:32 +0100
          Re: About Flibble Muttley@dastardlyhq.com - 2023-01-16 11:31 +0000
            Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-16 11:51 -0800
              Re: About Flibble Muttley@dastardlyhq.com - 2023-01-17 09:34 +0000
                Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-17 12:36 -0800
                Re: About Flibble Muttley@dastardlyhq.com - 2023-01-18 09:27 +0000
                Re: About Flibble Christian Gollwitzer <auriocus@gmx.de> - 2023-01-18 16:22 +0100
                Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-18 11:56 -0800
                Re: About Flibble scott@slp53.sl.home (Scott Lurndal) - 2023-01-18 20:00 +0000
                Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-18 12:11 -0800
                Re: About Flibble David Brown <david.brown@hesbynett.no> - 2023-01-18 21:17 +0100
                Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-18 12:35 -0800
                Re: About Flibble David Brown <david.brown@hesbynett.no> - 2023-01-19 08:55 +0100
                Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-23 20:11 -0800
                Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-23 20:12 -0800
                Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-18 12:37 -0800
                Re: About Flibble Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-01-18 15:30 -0800
                Re: About Flibble David Brown <david.brown@hesbynett.no> - 2023-01-19 08:55 +0100
                Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-19 12:16 -0800
                Re: About Flibble Muttley@dastardlyhq.com - 2023-01-19 09:33 +0000
                Re: About Flibble David Brown <david.brown@hesbynett.no> - 2023-01-19 15:28 +0100
                Re: About Flibble scott@slp53.sl.home (Scott Lurndal) - 2023-01-19 14:57 +0000
          Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-16 11:46 -0800
      Re: About Flibble Mr Flibble <flibble@reddwarf.jmc.corp> - 2023-01-14 19:24 +0000
    Re: About Flibble Mr Flibble <flibble@reddwarf.jmc.corp> - 2023-01-14 19:24 +0000
      Re: About Flibble "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-01-14 13:13 -0800

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