Bjarne Stroustrup “Programming Principles and Practice Using C++”
Chapter 9 Exercise 10 + 11 + 12
Using std_lib_facilities.h by Bjarne Stroustrup.
Using Chrono.h and Chrono.cpp by Bjarne Stroustrup,
including the Chrono.h header file and the Chrono.cpp source file. Chrono is an extensive date class used in this exercise.
Exercise 10, 11 and 12 unfortunately were already by Bjarne Stroustrup himself, since the changes to be made are already implemented in the Chrono.h and Chrono.cpp file I linked above. I hope I’m not mistaken on this and I did not just cheekily skip 3 exercises of the book. (Tell me if I did!)