This feels like a C++ tutorial from mid-90s. C++ code written today looks nothing like what's presented in this article. Besides, some poor sample code choices jump out at me, like throwing an int and using C library. I realize they are there to illustrate a point, but this reinforces bad habits.

In fact, if you are learning C++, you better start it as a new language, rather than a tumor grown on the side of C. These languages are too idiomatically different.