error: expected class-name before ‘{’ token

Question

I know there are a couple of similar questions(circular include) out stackoverflow and other websites. But I still can\'t figure it out and no solutions pop out. So I would

Answer 1

Replace

#include "Landing.h"

with

class Landing;

If you still get errors, also post Item.h, Flight.h and common.h

EDIT: In response to comment.

You will need to e.g. #include "Landing.h" from Event.cpp in order to actually use the class. You just cannot include it from Event.h