inner class and initialization list

[Scott]

Hi All,

I have two classes like so:

class A
{
// ...stuff
};

class B
{
public:
B() {}

private:
A a;
};

How can I specify that B should initialize a with A's default constructor
in its own initialization list. For example, do I write:

class B
{
public:
B() : a(a()) {}
// ..etc

or just,

B() : a() {}

or is there some other way?

Thanks for any assistance!

Best,
Scott

[mlimber]

Scott wrote:

Hi All,

I have two classes like so:

class A
{
// ...stuff
};

class B
{
public:
B() {}

private:
A a;
};

How can I specify that B should initialize a with A's default constructor
in its own initialization list. For example, do I write:

class B
{
public:
B() : a(a()) {}
// ..etc

or just,

B() : a() {}

or is there some other way?

a(A()) would work (note the change in case), a() is preferable, and
leaving out altogether will accomplish the same thing.

Cheers! --M

[Specktowsky Specktowsky]

Scott,
it is not necesary specify in the initialization list the default
constructor of member classes (a). The 'run-time' call default
constructors of all member classes before the constructor of the main
class.
Take care.