Inheritance Problem, Forward Class Declaration Not Helping

[iam13013]

I'm trying to implement an FSM of sorts, and I'm getting this error,

cmainmenu.h( 18 ) : error C2504: 'cGameState' : base class undefined

with this code:

cGameState.h

Code: Select all

class cGameState
{
yada yada yada.....
};

cGameState.cpp

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#include "cGameState.h"

void cGameState::yada yada yada.....

cMainMenu.h

Code: Select all

#include "cGameState.h"

class cMainMenu : public cGameState
{
yada yada yada.....
};

cMainMenu.cpp

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#include "cMainMenu.h"

void cMainMenu::yada yada yada.....

I wrote it, it wasn't working, so I tried a Forward Class Declaration.
cMainMenu.h

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class cGameState;

class cMainMenu : public cGameState
{
............
};

and I still get the same error. I realize that it is probably just some silly
little something I'm missing, but I need help... PLEASE....

Thanks in advance

[CuteAlien]

Is that the line (line 18) where you get the error?

Code: Select all

class cMainMenu : public cGameState 

Then the error is rather self-explaining. The baseclass is not defined (forward declarations don't do that). So you need to include cGameState.h before that.

edit: ups - you do that. OK, then it doesn't include it for some reasons. Either you have no header guards (google for it) or a circular reference in the includes (cGameState.h includes cMainMenu.h).

[Murcho]

Vitek posted up some really good state machine/graph code for me a couple of days ago in this thread. I've used it to setup my project and it works really well. Just thought it might save you some time.

[iam13013]

...or a circular reference in the includes...

That was it...I guess...
For some reason I was including cGame.h (which included cMainMenu.h) in cGameState.h, so I took it out and....Problem Solved!

Thanks!