Whats the particular problem against this: (MSVS.NET) I used to be able to do this normally, I''m guessing that the defines are somehow global and the classes contained in the headers are not??? /* file1.h */ #ifndef def1 #define def1 #include "file2.h" class ff1 { public: int something; ff2 *pff2; }; #endif /* file2.h */ #ifndef def2 #define def2 #include "file1.h" class ff2 { public: int something; ff1 *pff1; }; #endif ( file2.h(11) : error C2143: syntax error : missing '';'' before ''*'' file2.h(11) : error C2501: ''ff2::ff1'' : missing storage-class or type specifiers file2.h(11) : error C2501: ''ff2:ff1'' : missing storage-class or type specifiers )

Those files look correct: did you copy/paste them into your post, or did you retype? My guess is that in your real code you forgot to put a semi-colon at the closing bracket of class ff1 in file1.h. When you create a class, you MUST close it with a semi-colon, even though MSVC doesn''t warn you if you forget, but instead gives weird errors like the one you''re describing.

They are exact copies, this was just a simple test to proof that that was the problem and not a typo.

So it''s not a typo.

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This is entirely correct. In a file that uses file1.h, the #include file1.h expands to:

#ifndef def1#define def1//#include "file2.h" expands to:/* file2.h */#ifndef def2#define def2//#include "file1.h" expands to nothing, as def1 is already definedclass ff2{public:int something;ff1 *pff1;};#endifclass ff1{public:int something;ff2 *pff2;};#endif

To get it to work, put a forward declaration of ff2 in file1.h. like this:

#ifndef def1#define def1#include "file2.h"class ff2;class ff1{public:int something;ff2 *pff2;};#endif

and the other way around in file2.h

Ah I see now! Thanks!