Lesson 23 - Namespaces in C++
In the previous lesson, Advanced Inheritance in C++, we were talking about advanced inheritance. In today's C++ tutorial, we're going to focus on namespaces, which serve mainly to group classes in large applications.
When we're creating a larger application, we'll necessarily reach the point where we have a large number of classes. Of course, having 100 classes in a single folder is very confusing. We don't see what the application consists of at first glance and we're tempted to write redundant code, because instead of modifying the existing one, we'll write new code since we don't even know there's already similar code somewhere. This, of course, makes the situation worse. Another problem is name collisions (for example, of our class and a class from a library) that we resolve by assigning long unique names to our classes or by confusing prefixes.
There are several ways to solve the problem of a large number of classes.
Fortunately, C++ supports namespaces, so it's definitely a good idea to use this
mechanism. Namespaces are, among other things, used by the standard library
itself. We're talking about the magic
using namespace std; at the
beginning of the file.
Simply put, namespace is a
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