#include problems

[vilmer]

Hi everyone, I've some problems including header files. I have 2 classes COne and CTwo, and COne implements CTwo objects, so I put an include CTwo statement in COne.h. Both classes must use some functions declared in a Myheader.h file. Including Myheader in both .cpp or .h files produces linking error, and the same does including Myheader.h in CTwo.h to exploit the inheritance of the include statement. The error is LNK1169: one or more multiply defined symbol founds. Any suggestion?

[Cedric Moonen]

Did you put these statements in all of your *.h files : #if !defined YOURFILENAME #define YOURFILENAME //Declaration of your class ... ... ... #endif Replace YOURFILENAME by something unique to every file.

[vilmer]

Those statements are set by default by Visual Studio in every class file. I tried also to create a dll file from Myheader, but even if i add that library to my project, the app doesn't recognize the functions of the library. Should I addd a .DEF file?

[Sreekanth Muralidharan]

Hello You should not include Myheader.h in both the files. You can include the Myheader.h in CTwo.h and include CTwo.h in COne.h I hope it would work... Bye, Sreekanth Muralidharan ;)

[vilmer]

I've already tried this way, but the result was the same. I solved the problem in another way. Thanks to everyone