Managed C++/CLI

//Declarations:
public __gc class __single_inheritance b;
public __gc class a;
//Definitions:
public __gc class a
{
public:
	a::a(){}
public:
	b* m_b;
	System::String* stringInClassA;
};

public __gc class b
{
public:
	b::b(){}
public:
	a* m_a;
	System::String* stringInClassB;
};

// This is the entry point for this application
int _tmain(void)
{
   a* A = new a();
   b* B = new b();
   A->stringInClassA = new String("This is string in class A");
   B->stringInClassB = new String("This is string in class B");
   A->m_b = B;
   B->m_a = A;
   Console::WriteLine(A->m_b->GetType()->ToString());
   Console::WriteLine(B->m_a->GetType()->ToString());
   Console::WriteLine("");
   Console::WriteLine("from class A:");
   Console::WriteLine(A->m_b->stringInClassB);
   Console::WriteLine("");
   Console::WriteLine("from class B:");
   Console::WriteLine(B->m_a->stringInClassA);
   int i = Console::Read ();

   return 0;
}