How to use namespaces in C++ applications?

Typically you want to follow these good practice guidelines when developing a software application:

• no more than 10-20 classes per package
• no more than 1000 to 2000 lines of code per class
• don't assign more than one responsibility to each class

If you go over one of these numbers then consider refactoring your application by creating a new package or a new class.

Note: The namespace in C++ is used as the package is used in java.