Why does C++ code missing a formal argument name in a function definition compile without warnings?

Question

While getting started with some VS2005-generated MFC code, I noticed it overrode a method with something like this:

void OnDraw(CDC* /*pDC*/)
{
    ...
    /         


        

Answer 1

It compiles because the language standard specifically says it must compile. There's no other answer. This is one of the bits that make C++ different from C. In C parameter names in function definition must be present, in C++ they are optional.

I actually wonder why you ask your "why" question. Do you see anything unnatural, unusual or illogical in this behavior?