state pattern C++ It just will not work

[Zeh Mau]

Hi there,

I have tried to implement the state pattern
but the linker raises the error: can't resolve symbols.

For me it is very frustrating, because I tried several hours to solve
this problem.

Is anybody willing to analyze my code what is going wrong.

It seems I have the chicken egg problem: Who was first the chicken or
the egg.

This seems to be the problem, but from my point of view,
this is very common when designing a problem.

I appreciate your comments.

Zeh Mau

 

[Gert-Jan de Vos]

Hi there,

I have tried to implement the state pattern
but the linker raises the error: can't resolve symbols.

I suggest you have a look at the wikipedia entry for "State pattern".
It has a quite nice example in C++ that should cover your needs.