Объявление в классе объекта другого класса

// Test1.h: interface for the CTest1 class.
//
//////////////////////////////////////////////////////////////////////
 
#if !defined(AFX_TEST1_H__D0C0B304_C969_40BE_BADA_F4A2F836F8B0__INCLUDED_)
#define AFX_TEST1_H__D0C0B304_C969_40BE_BADA_F4A2F836F8B0__INCLUDED_
 
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
 
#include "test2.h"
 
class CTest1  
{
public:
    CTest1();
    virtual ~CTest1();
 
};
 
#endif // !defined(AFX_TEST1_H__D0C0B304_C969_40BE_BADA_F4A2F836F8B0__INCLUDED_)

// Test2.h: interface for the CTest2 class.
//
//////////////////////////////////////////////////////////////////////
 
#if !defined(AFX_TEST2_H__92D40EE2_B73E_48F8_BFC4_ED9FC587ED38__INCLUDED_)
#define AFX_TEST2_H__92D40EE2_B73E_48F8_BFC4_ED9FC587ED38__INCLUDED_
 
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
 
#include "test1.h"
 
//class CTest1;
class CTest2  
{
public:
    CTest2();
    virtual ~CTest2();
 
    CTest1 test;
};
 
#endif // !defined(AFX_TEST2_H__92D40EE2_B73E_48F8_BFC4_ED9FC587ED38__INCLUDED_)

class CTest1
{
public:
    CTest2 test;
};
 
class CTest2
{
public:
    CTest1 test;
};