[RESOLVED] How do you declare a class within itself?

[kmkkra]

Hello and good day.

IDE: code::blocks
OS: Windows 7



I am a novice C++ programmer, and I am having trouble declaring a class withing itself or actually a vector of a class within itself.
I am not sure on how to go about doing it or what alternatives I have. Whenever I add the " std::vector<COrderPreferences>
orderPreferences; " to my CDomain class I get 1 very big error in stl_algobase.h - or I can comment out "std::vector<CDomain> domain;"
, and leave the COrderPreferences vector and everything works.




So below is a sample of my problem, could someone show me what is wrong, and give me some advice?

//-----------Domain.h
 
#ifndef CDOMAIN_H
#define CDOMAIN_H
#include <vector>
 
 
 
 
class CDomain
{
    public:
 
        std::vector<COrderPreferences> orderPreferences;
        std::vector<CDomain> domain;
        void create();

};
 
#endif // CDOMAIN_H

 
 

 
//---------CDomain.cpp
 
#include "CDomain.h"
 
void CDomain::create()
{
     domain.resize(3);

}

 
 


//EDITED in respect to post #6 VicotorN










//-------------COrderPreferences.h


#ifndef CORDERPREFERENCES_H
#define CORDERPREFERENCES_H

#include <vector>
#include <string>


class COrderPreferences
{
    public:

         struct ControlAttributes
        {
               DWORD exStyles;
               std::string types;
               std::string defaultCaption;
               DWORD styles;
               int XStart;
               int YStart;
               int XWidth;
               int YHeight;



               ControlAttributes& operator=(ControlAttributes& a)
               {

//                   if  (this != &a) // protect against invalid self-assignment
//                   {
                       exStyles       =    a.exStyles;
                       types          =    a.types;
                       defaultCaption =    a.defaultCaption;
                       styles         =    a.styles;
                       XStart         =    a.XStart;
                       YStart         =    a.YStart;
                       XWidth         =    a.XWidth;
                       YHeight        =    a.YHeight;


//                   }

                   return *this;
               }
        };
      
  

        ControlAttributes controlAttributes[15];
};


#endif // CORDERPREFERENCES_H

Thank you very much for your time and effort. Best of wishes to everyone in this forum!