> I'd really appreciate it if someone could give me a (hopefully) quick
> answer to this little conundrum:

> I've got a class

> class A
> {
> public:

> A(A* pA);
> A();
> virtual ~A();
> }

> A::A()
> {

> }

> A::A(A* pA)
> {
> if(pA)
> {
> file://variable copying here

> }
> }

> And another class

> class B : public A
> {
> public:

> B(B* pB);
> B();
> virtual ~B();
> }

> B::B()
> {

> }

> B::B(B* pB)
> {
> if(pB)
> {
> file://variable copying here

> file://but I also want to copy all of the base class
> variables, so
> A((A*)pB);  <--- PROBLEM

> }
> }

> So if I want to make a copy of my class B

> B* pX=new B();
> B* pB=new B(pX);

> All the variables in B are copied OK, but the base class variables
> aren't. It seems to make a new class of type A and then delete it
> immediately.

> Question - What syntax do I need to succesfully copy B with all the
> base class variables in A?

> Regards,

> Si

>B::B(B* pB) :
>    A(pB)    // invoke super-class
>{
>    if (pB)
>    {
>        // copy here
>    }
>}