C++ 中类之间通过指针访问

#include <vector>
using namespace std ;
class CVX_Obj
{
public:
	CVX_Obj(){};
	~CVX_Obj(){};
	void printobj()
	{
	cout<<"进入Obj"<<endl ;
	}
};
class CVX_Environment
{
public:
	CVX_Environment(){};
	~CVX_Environment(){};
	void printEnvironment()
	{
	cout<<"进入Env"<<endl ;
	}
	CVX_Obj*pObj;//初始化指针
};
class CVX_FEA
{
	public:
	CVX_FEA()
	{
		pEnv->printEnvironment();
	}
	~CVX_FEA(){};
         CVX_Environment* pEnv;//初始化指针
};
class VoxCad
{
	public:
		VoxCad()
		{
			MainFEA.pEnv=&MainEnvironment;
			MainEnvironment.pObj=&MainObj;
		}
		~VoxCad(){};
		CVX_FEA MainFEA;
		CVX_Obj MainObj;
		CVX_Environment MainEnvironment;
		void printt()
		{
		cout<<"进入VoxCad"<<endl ;
		MainFEA.pEnv->pObj->printobj();
		MainFEA.PRT();
		}
};




int main()
{
VoxCad voxcad;
voxcad.printt();
system("pause");

}