Is this constructor correct?

Question

I have two classes A and B, and in class A I have an member of type B:

class B {
    public:
        B(); //default constructor
};

class A {
    public:
        A(); //constructor
        B b;
};

This is the definition of class A's constructor:

A::A() : b()
{}

Here, I tried to initialize b using the initialization list. My question is, is this way to initialize b correct, or am I just creating another temporary object named b inside the constructor of A that has nothing to do with A::b?

Answer 1

This is correct. However, since b is of class type, the default constructor will be called automatically if b isn't mentioned in A::A's initialization list, so you don't need to mention it at all.