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From: Tim Rentsch <tr.17687@z991.linuxsc.com>
Newsgroups: comp.lang.c
Subject: Re: Programming exercise/challenge
Date: Sun, 13 Dec 2020 20:57:32 -0800
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luser droog <luser.droog@gmail.com> writes:

[...]

> So, here's my Version 5.  [...]
>
> //strpcom-v5.c:
> //$ make strpcom-v5 CFLAGS='-std=c99 -Wall -pedantic -Wextra -Wno-switch'
> //#define DEBUG(...) __VA_ARGS__
> #define DEBUG(...)
> [...]

I'd appreciate it if you would get rid of the DEBUG() macro
and find another way of enabling snippets of debugging
code that doesn't use the C preprocessor (except perhaps
for initializing a controlling variable, eg

    #ifndef DEBUG_LEVEL
    #define DEBUG_LEVEL 0
    #endif
    static const int debug = DEBUG_LEVEL;

and then test 'debug' later in the code using regular
language statements).

Also, try this test case

    (echo foo // blah ; echo bas) | your-executable

The output I expect has two lines.