Let’s look at the C++ code used to test the timing to walk through inheritance and virtual functions. The parent is the class PinOutputAbstract. It represents an output pin on an Arduino: ...

In C++, a pure virtual function is a virtual function that you declare in a base class but don't define. A class containing a pure virtual function is called an abstract class, and you can't create ...

I have read in several books (including a book on using QT toolkit) warning about using C++'s virtual function because of performance penalty.But they are quite vague on why this is so. Can ...