C structs NxN intersection

Question

I have a script

a.h    
#include b.h    

typedef struct b B;
typedef struct a A;
struct a{
   a   val1;
   b   val2;
}

---

b.h    
#include a.h    

typedef struct b B;
typedef struct a A;
struct b{
   a   val1;
   b   val2;
}

how can I make this work?
I can create val1 and give him val1.val2=xx but val1.val2.val1=xx or val2.val1=xx it isn't working.

Answer 1

You're trying to create a struct that contains a copy of itself. That can't work. What you can do is create a pointer to itself:

typedef struct b B;
typedef struct a A;
struct b{
   A   *val1;
   B   *val2;
};