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From: "Thomas Tutone" <Thomas8675309 AT yahoo DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Fwd: Help! "cout" compile error
Date: 4 May 2005 05:44:04 -0700
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Reply-To: djgpp AT delorie DOT com

DoObi DOT  DOT  DOT  AT aol DOT com wrote:
> Sorry to be sending this message again. I don't know if I sent it
wrong the
> first time or not.  I did get one response but I didn't  understand
it, it
> didn't really explain anything.  If Anyone can help me, I  have
forwarded my
> question again, or If someone could let me know if I am  posting this
wrong. My
> intent is to send it to the newsgroup. Any and all help  is
appreciated. Thanks
> again

> [ Attached Message ]
> From: DoObi DOT  DOT  DOT  AT aol DOT com
> To: d DOT  DOT  DOT  AT delorie DOT com
>Date: Fri, 29 Apr 2005 00:01:47 EDT
> Local: Fri,Apr 29 2005 12:01 am
> Subject: Help! "cout" compile error


> Help!! I read the FAQ blah Blah Blah and tried all that jazz I'm
sposed to
> do.  That being my disclaimer/shirking-off-of-any­-further
>
responsibility-of-reading-or-f­urther-and-likely-extensive-re­search:
When I try  > to compile "hello
> world" this is the compile error message I get:


> C:\djgpp>gpp hello.cpp -o hello.exe
> hello.cpp: In function 'int main(  )':
> hello.cpp:6: error:'cout' undeclared (first use this  function)
> hello.cpp:6: error:(Each undeclared identifier is reported only  once
for
> each function it appears in.)

You don't provide a listing of the program you tried to compile, which
makes it slightly difficult to tell you for sure, but my crystal ball
is working fairly well today.  The answer is that your program is not a
valid C++ program.  Here is a valid C++ "Hello World" program:

#include <iostream>
int main()
{
    std::cout << "Hello World!" << std::endl;
}

My guess is that you omitted the "std::" before "cout."  If you want to
know _why_ you need a "std::" there, please get a C++ book written
after 1997 - that's when they changed the C++ standard to use the std
namespace.  And if your program compiles fine as is on other compilers,
that's because those other compilers are old and don't comply with the
C++ standard.

Best regards,

Tom