Templates ........

I want to know about the templates. In books I have found that they are not portable. So, how to make it portable?:(

Maybe that book is really old? Templates are part of the C++ standard.

How do I use X questions are really too general. Searching google typically works nicely.

Actually, many compilers choke on templates, depending on the limits that are push, and in fact, MS compilers are usually the least supportive of advanced templates. If you keep it simple, you should be fine, though. Compilers usually implement a template compiler that runs beforehand, and it sometimes just resorts to a form of macro expansion for the templates, generating all possible copies textually, and to greater and lesser degrees of efficiency/redundancy.