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From: owl <owl@rooftop.invalid>
Newsgroups: comp.os.linux.advocacy,sci.physics,alt.free.newsservers,news.software.readers
Subject: Re: Peter Kohlmann has brain damage, I think.
Date: Mon, 28 Mar 2016 23:32:47 +0000 (UTC)
Organization: O.W.L.
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In comp.os.linux.advocacy Jeff-Relf.Me <@.> wrote:
> You (PeterKöhlmann) wrote:
>> It is *never* a good idea to use unreferenced variables, 
>                                ^^^
> Again, an "unreferenced variable" ( warning C4101 ) 
> is a variable that's declared but NOT USED.
> 
> Declaring a variable, or even a bunch of variables,
> then not using them, perhaps because you've temporarily
> commented out some code, is NEVER a problem.
> 
> You've never made any sense Pete, not once,
> not in all your decades of posting here.
> Honestly, I think you have brain damage.

anon@lowtide:~/code$ gcc -Wall -o warn1 warn1.c
anon@lowtide:~/code$ gcc -Wall -o warn2 warn2.c
warn2.c: In function ‘blah’:
warn2.c:19:6: warning: unused variable ‘x’ [-Wunused-variable]
  int x=4;
      ^
anon@lowtide:~/code$ ./warn1
x: 0
y: 4
sum: 4
anon@lowtide:~/code$ ./warn2
x: 0
y: 0
sum: 0
anon@lowtide:~/code$ 

anon@lowtide:~/code$ diff -u warn1.c warn2.c
--- warn1.c	2016-03-28 19:25:07.362314096 -0400
+++ warn2.c	2016-03-28 19:25:29.474314499 -0400
@@ -17,6 +17,6 @@
 void blah(void)
 {
  int x=4;
- y=x;
+/* y=x; */
 }
 
anon@lowtide:~/code$