Question

I have test.h file and example.h file and I want to include each one in the other
I tried the following but didn’t work.

In file test.h:

 #ifndef "example.h"

 #define "example.h"`

...

 #endif

And in file example.h :

#include "test.h"

And later tried :

#ifndef "test.h"

 #define "test.h"

...

#endif

But nothing worked.

Answer 1

You need to come up with some unique identifiers for each include guard. For example:

#ifndef EXAMPLE_H
#define EXAMPLE_H
...
#endif

You can’t just use the filenames with #ifndef etc.