std::

I've reading some posts in this forum, and always found this funny looking code: "std::" . What is it? I've read nothing about it in my C++ tutorial book (published 2003). I mean, wat does it do (it looks pointless to me...)? Where do i put it? etc. etc.:confused:

Read up on C++ namespaces.

Your C++ book author probably was careless, or drafted the book too early.

i guess i was wrong, I just found something 'bout namspaces in the later secions. I was just wondering since none of the sample programs (I've seen sofar) used std::

std is the standard template library and :: is the scope resolution operator so basicly std::function() means the function is part of the std namespace.

The sample programs so far probably had
using namespace std;
at the top.

Correction

Quote:

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std is the standard template library

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STL is the Stadard Template Library.

std is the namespace where all c++ identifiers are defined. Namespaces are used to reduce name clashes among different libraries.