Circular including, help!!

[jalkadir]

Check this out... file foo.hpp includes bar.hpp, but bar.hpp includes
foo.hpp.
The compiler/linker is having a lot of problem resolving this problem.
Does anyone know if there is a way to solve this problem.

TIA

 

[AnonMail2005]

Post the code so we can help out.

 

[hamburger]

add macro in foo.hpp
#define FOO_HPP

 

[__PPS__]

You may use header duards (or whatever to call them) like these:

file foo.hpp:

#ifndef _FOO_HPP_
#define _FOO_HPP_
.... dontents of foo.hpp goes here
#endif /* _FOO_HPP_ */


file bar.hpp:

#ifndef _BAR_HPP_
#define _BAR_HPP_
.... dontents of bar.hpp goes here
#endif /* _BAR_HPP_ */


and now you may include any of them in any order any number of times,
but the code will be included only once

 

[__PPS__]

You may use header duards (or whatever to call them) like these:

guards I meant

you may see that inclusion of foo.hpp defines macro _FOO_HPP_, the next
time this header included once again _FOO_HPP_ will be defined and the
entire contents of it will be skiped, that's how it works. Same thing
happens with _BAR_HPP_ ...

 

[EventHelix.com]

You will need to use forward declarations to resolve the circular
includes.

The following article about header file including should help:
http://www.eventhelix.com/RealtimeMantra/HeaderFileIncludePatterns.htm

 

[Marcus Kwok]

You may use header duards (or whatever to call them) like these:

file foo.hpp:

#ifndef _FOO_HPP_
#define _FOO_HPP_
... dontents of foo.hpp goes here
#endif /* _FOO_HPP_ */


file bar.hpp:

#ifndef _BAR_HPP_
#define _BAR_HPP_
... dontents of bar.hpp goes here
#endif /* _BAR_HPP_ */

Yes, but names starting with an underscore followed by a capital letter
are reserved for the implementation (also, names starting with two
underscores). You should remove them, like FOO_HPP and BAR_HPP.