[n1gel]

Hi

I'm writing an MFC application and I’ve come up against a problem.

I have 2 header files:
Datagram.h
InterfaceDlg.h

Now In Datagram.h I create a struct:

typedef struct _DATAGRAM {
unsigned Summary :1;
unsigned Depth :1;
unsigned Image :1;
unsigned Position :1;
unsigned Attitude :1;
unsigned Clock :1;
unsigned Runtime :1;
unsigned Selection :2;
DepthDGRAM DEP;
PosDGRAM POS;
} DATAGRAM;

And in InterfaceDlg.h I create a vector off variable of this type:

std::vector<DATAGRAM> VDG;

Now I have tried using the include statement (#include "Datagrams.h") this works for every other class where I use a DATAGRAM object but not in the InterfaceDlg.h. I get error messages

error C2065: 'DATAGRAM' : undeclared identifier

Is this because it is a header file? Or because InterfaceDlg.h is for a dialog window?

The only way I have got around this is by replacing the include statement with the whole code from the other header file. This is obviously not what I want to do because I have to keep updating both declarations of the DATAGRAM object if I want to change it and I now have two DATAGRAM classes, which is just sloppy.

Hope this all makes sense and if anyone could help that would be really good

Thanks

Nige

[dquigley]

Are you declaring an iterator for the vector in a for() loop and then trying to use the iterator outside the scope of the loop?.

   for (std::vector<DATAGRAM>::iterator i = v.begin() ; i != v.end(); ++i)
   ;
   --i;   // C2065

Another reason could be that you are not instructing the compiler to recognize the std namespace in InterfaceDlg.h.

using namespace std;

[n1gel]

Hi, Thanks for the reply.

I don't think the problem is with the array as i can't even declare a DATAGRAM variable without the error (error C2501: 'DATAGRAM' : missing storage-class or type specifiers)e.g.

DATAGRAM Dg;

I have already tried the

using namespace std;

but i still won't work.

Thanks for the help if you have any other ideas that would be great

[dquigley]

I know this is silly - but I just noticed that you say there are 2 header files:

Datagram.h
InterfaceDlg.h

Later you refer to this:

(#include "Datagrams.h")

could the 's' on the end be the issue?

[n1gel]

Yea i wasn't quite that simple but it was pretty simple.

It was baecause the files weren't stored in the same directory i had to change the include statment to

#include"..\Datagrams.h"

It annoyed me because i would have noticed if the error message was can't find include file weird.

Thanks for your Input though