c/c++ include conflict

EAD · 04-19-2006, 02:42 AM

Hii, I have two .h files one name x and one name y
I want to do in x
#include "y.h"

and in y I need to define an x type so I need
#include "x.h"
but then when compiling my make file I get an error ISO C++ forbids declaration of 'X' with no type
what can I do please?

Ellops · 04-19-2006, 04:21 AM

in x u include types from y and in y from x...

That's a problem... try to separete the things u declare in x which included in y in a different header z (or those of y in x) and include z instead..

or in a way that x won;t need y to define itsown types and vice versa

graemef · 04-19-2006, 07:38 AM

You can also add a forward declaration.

in X you might have:

class Y;
class X{... private: Y * myY, ...};
#include "y.h"

and in Y you might have:

class X;
class Y{... private: X * myX, ...};
#include "x.h"

EAD · 04-20-2006, 06:37 AM

Quote:

Originally Posted by graemef

You can also add a forward declaration.

in X you might have:

class Y;
class X{... private: Y * myY, ...};
#include "y.h"

and in Y you might have:

class X;
class Y{... private: X * myX, ...};
#include "x.h"

Tanx

that is waht I was looking too