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: ...

But, in fact, a is 1, x is 2 and b is 3. (Go ahead, test it yourself with a debugger.) Why? Because the initializer expressions happen in the order the variables are declared in the class -- not the ...