From: "bowman" <bowman AT montana DOT com>
Newsgroups: comp.os.msdos.djgpp
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Subject: Re: Problem compiling c++
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Date: Sat, 25 Aug 2001 10:53:59 -0600
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To: djgpp AT delorie DOT com
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"Sahab Yazdani" <sahaby AT operamail DOT com> wrote in message
news:3B7F0AB9 DOT 5080903 AT operamail DOT com...
>
> > using namespace std;
> ^^^^^^^^^^^^^^^^^^^^^^
> what does this do?? I have a bunch of books on C++, but i've never run
> across this line b4.

you might want to update your C++ references. Try Stroustrup's 3rd Edition.
A current C++ compiler will reject :

        cout << "Hello World" << endl;

and require you to qualify the references to the std namespace as:

       std::cout << "Hello World" << std::endl;

the 'using namespace std;' tells the compiler that you are, indeed, pulling
in functions from the std package and you will not have to qualify each
usage. While this is handy, it negates the attempt to reduce namespace
pollution, and should be applied sparingly. For instance, if you had two
packages providing the function 'do_it()', qualifying them as pkg1::do_it()
and pkg2::do_it() avoids the compiler errors and also removes ambiguity for
the human reader.