class Mypoint{
      public:
      double x;
      double y;
      double z;      
      long int loadfromstr(string s);
      long int show();
      };
class Mypoints{
      public:
      long int count;
      Mypoint *p;
      long int mydel();
      long int show();
      };
      
class Mysquare{
      public:
      long int count;
      vector <long int> fff;
      vector <long int> fn;
      vector <long int> ft;
      long int mydel();
      long int loadfromstr(string s);
      long int show();
      };
class Myforma{
      public:
      long int count;
      Mysquare *ff;
      long int mydel();
      long int show();
      };
class Myobj{
      public:
            Mypoints v;
            Mypoints vn;
            Mypoints vt; 
            Myforma f;
            long int loadfromfile(string filename);
            long int loadfromstr(string str);
            long int mydel();
            long int show();
            long int in_obj(Mypoint mp,int xpp);
      };

Myobj obj;

Myobj *objs;
...
objs=new Myobj[n];

vector <Myobj> objs;