If you are asking the order of the parent and derived class constructors, see Are parent class constructors called before initializing variables?.
In short, the base (or parent) class (looks like A
in your case) constructor will complete first.
Question
For example:
Class A
{
A();
}
Class B
{
A a;
B(A& m_a) : a(m_a)
}
Which constructor will apply first? the A() constructor of the B parent, or the A object inside class B?
La solution
If you are asking the order of the parent and derived class constructors, see Are parent class constructors called before initializing variables?.
In short, the base (or parent) class (looks like A
in your case) constructor will complete first.
Autres conseils
The parent constructor will execute first, then the subclass constructor will initialize the variable.