Mutually referential classes

[Colin JN Breame]

Say there are two classes:

class A {
B *b;
};

class B {
A *a;
};

How can this be defined and compiled?

Thanks

 

[Sumit Rajan]

Say there are two classes:

class B;

 

[The Flib]

Say there are two classes:

class A {
B *b;
};

class B {
A *a;
};

How can this be defined and compiled?

Thanks

Heya. What you need to do is stick a forward declaration of B before
you define A. The compiler is way smarter than we mere humans, so it
figures out what you mean when you say:

class B;

class A
{
B *b;
};

class B
{
A *a;
}

 

[David Harmon]

This issue is covered in Marshall Cline's C++ FAQ. See the topic
"[38.11] How can I create two classes that both know about each other?"
It is always good to check the FAQ before posting. You can get the FAQ
at:
http://www.parashift.com/c++-faq-lite/

 

[c++novice]

Say there are two classes:

class A {
B *b;
};

class B {
A *a;
};

How can this be defined and compiled?

Thanks

Do a forward declaration--

Class B; //declared

class A {
B *b;
};

class B { //defined
A *a;
};

 

[Colin JN Breame]

This issue is covered in Marshall Cline's C++ FAQ. See the topic "[38.11]
How can I create two classes that both know about each other?" It is
always good to check the FAQ before posting. You can get the FAQ at:
http://www.parashift.com/c++-faq-lite/

Oh yes, should have checked.

Thanks anyway!