Exercise created by Arkadiusz W. in https://www.udemy.com/video-course-c-from-beginner-to-expert/
Meant to be used with bash on Linux.
CMake and relevant GCC compiler is required to build and run the files! sudo apt install cmake

Open a terminal in the main directory.
To read or edit the contents of the project files, cd src, then open a file by your favorite text editor.
To run a specific example, edit the CMakeLists.txt file, line 3 to change "#" to the exercise number:

set(SOURCE src\oop_books_step_#.cpp)

Save the file, then cd build, cmake .., and make. Run the executable by .\oop_books.

Note: As the differences in exercise 5 have already been covered in the previous parts, it is skipped.