Re: A simple problem with an abstract class...

I'm working an a large legacy app that is built with Makefiles using
the Microsoft Visual Studio 8/VC/BIN/cl.EXE compiler. I have a crazy
problem that I'm hoping someone has seen before. I've included a
simplified version of the problem that runs fine in a VC++ console
test project. The project crashes if I instantiate an object of class
B without commenting out the call to the pure virtual function x() in
A::doIt(); Naturally, B deals with objects derived from A.

Thanks for taking a look.

class A

{

public:

     void doIt() { x(); }

     virtual void x() = 0;

     virtual ~A() {}

};

class B

{

public:

     B() {}

     void push(A* pA) { ... }

     A* pop() { A* pA = ...; return pA; }

     void tryIt() { A* pA = pop(); pA->doIt(); }

};