What are the rules for calling the superclass constructor?

Question

What are the C++ rules for calling the superclass constructor from a subclass one?

For example, I know in Java, you must do it as the first line of the subclass cons

Answer 1

CDerived::CDerived()
: CBase(...), iCount(0)  //this is the initialisation list. You can initialise member variables here too. (e.g. iCount := 0)
    {
    //construct body
    }