Design Patterns in C++: Behavioral - Observer to Visitor

Developers and architects need to be able to recognize and correctly apply design patterns. Part of a multi-series course about C++ patterns Design Patterns in C++ - Behavioral - Observer to Visitors, this course continues to introduce viewers to Behavioral design patterns. This course covers the Observer and State patterns. It also shows how these patterns can be used in modern C++ (C++11 and beyond). Software needed: A C++ IDE (e.g. Visual Studio, CLion), or a text editor, (e.g. VIM, EMACS), along with a C++ compiler.