Hi all<P>I'm writing a library in C++ and I would like to use namespaces, as it is suggested. But I'm having some problems.<P>First, I've created all my header and source files without any namespace.

Namespaces: They are used to group related variables, functions, or classes, preventing naming conflicts. They allow you to use the same name in different parts of your program without any issues.

which defines the standard (std) version for c++. (I'm not a proficient c++ programmer, so please correct me, if this is wrong!!) When setting this line to ...