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Top Forums Programming C++ class definition with a member of the same class Post 302430662 by pogdorica on Friday 18th of June 2010 09:08:21 AM
Old 06-18-2010
C++ class definition with a member of the same class

Hi, i have a question about C++. Is it possible to declare a class with a member ot the same class? For example, a linked list or i want to convert this C code to C++ class (Elemento)

Code:
typedef struct elemento
   {
      char name[40];
      char value[100];
      List<struct elemento> ltElementos;
   } s_elemento;

typedef List<s_elemento> ListElementos;

Convert to:
Code:
   public class Elemento
   {
       string name;
       string value;
       List<Elemento> ltElemento;
       
       ......
   
   }

If i compile that, the error is:
Code:
field `Elemento' has incomplete type

May someone help me?
 

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form_element(7rheolef)						    rheolef-6.1 					    form_element(7rheolef)

NAME
form_element - bilinear form on a single element SYNOPSYS
The form_element class defines functions that compute a bilinear form defined between two polynomial basis on a single geometrical element. This bilinear form is represented by a matrix. The bilinear form is designated by a string, e.g. "mass", "grad_grad", ... indicating the form. The form depends also of the geometrical element: triangle, square, tetrahedron (see geo_element(2)). IMPLEMENTATION NOTE
The form_element class is managed by (see smart_pointer(2)). This class uses a pointer on a pure virtual class form_element_rep while the effective code refers to the specific concrete derived classes: mass, grad_grad, etc. IMPLEMENTATION
template <class T, class M> class form_element : public smart_pointer<form_element_rep<T,M> > { public: // typedefs: typedef form_element_rep<T,M> rep; typedef smart_pointer<rep> base; typedef typename rep::size_type size_type; typedef typename rep::vertex_type vertex_type; typedef typename rep::space_type space_type; typedef typename rep::geo_type geo_type; typedef typename rep::coordinate_type coordinate_type; // constructors: form_element (); form_element ( std::string name, const space_type& X, const space_type& Y, const geo_type& omega, const quadrature_option_type& qopt); // accessors & modifier: void operator() (const geo_element& K, ublas::matrix<T>& m) const; virtual bool is_symmetric () const; // for scalar-weighted forms: void set_weight (const field_basic<T,M>& wh) const; bool is_weighted() const; const field_basic<T,M>& get_weight () const; // for banded level set method: bool is_on_band() const; const band_basic<T,M>& get_band() const; void set_band (const band_basic<T,M>& bh) const; }; SEE ALSO
geo_element(2), smart_pointer(2) rheolef-6.1 rheolef-6.1 form_element(7rheolef)
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