From:	"Kim Seng" <Query AT singnet DOT com DOT sg>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Help in my codes.
Date:	Fri, 20 Sep 2002 08:47:04 +0800
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To:	djgpp AT delorie DOT com
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"Hans-Bernhard Broeker" <broeker AT physik DOT rwth-aachen DOT de> wrote in message
news:amck32$1ph$1 AT nets3 DOT rz DOT RWTH-Aachen DOT DE...
> Kim Seng <Query AT singnet DOT com DOT sg> wrote:
>
> > Any example on this "std::" coding?
>
> Before ANSI/ISO C++ Standard, all things in the standard library were
> accessible just by their name, i.e. to access the standard output
> stream you would write:
>
> #include <iostream.h>
>
> //...
> cout << "blabla" << nl;
>
> The Standard moved them all into a namespace called "std", so the
> actual name of cout is now std::cout.  It also changed the names of
> the standardized header files to not have a ".h" at the end:
>
> #include <iostream>
>
> //...
> std::cout << "blabla" << nl;
>
> "using namespace std;" tells the compiler that you want all things in
> the namespace "std" to become available in your program's space,
> without those std:: prefixes.
>
> The idea behind namespaces is to avoid conflicts of like-named things
> from indepentant sources (the language standard, some vendor's
> library, a third-party library, your own source code, ...).  Like the
> one between the function "count" provided by the C++ Standard Template
> Library (STL for short) and your original example's variables called
> "count", too.  Because of namespaces, you can keep calling your
> program's own variable "count", but still access the STL function as
> std::count.

Thanks a lot for the information. I had really learned alot from this
newsgroup. As a newbie, I really think that C++ is one of teh best language
that I ever learned. It's really a pity that I did not start it early. :p
Thanks to Hans for the advise. Thanks.
I will continue to learn more this language.

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