C/C++ very simple question.

[uman]

My question is this: let's say I have a file called "foobar.h" and another file called "quux.h", and they both rely on each other. If I #include foobar.h in quux.h and #include "quux.h" in foobar.h, there is obviously an infinite loop. How can I get around this?

[paulbiz]

encapsulate your entire foobar.h file in an #ifndef foobar_h and then define something like #define foobar_h

this way if foobar_h is defined, it means it's already been loaded and you skip it's contents.

[uman]

thanks for the help.

[vdboor]

Can you pre-declare certain symbols?

like:

Code: Select all

class Foo;

class Quux
{
  private:
    Foo * foo;
}

And only include "foo.h" in "quux.cpp". It's also compiles the project much faster.