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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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XrmUniqueQuark(3X11)						     MIT X11R4						      XrmUniqueQuark(3X11)

Name
       XrmUniqueQuark, XrmStringToQuark, XrmQuarkToString, XrmStringToQuarkList, XrmStringToBindingQuarkList - manipulate resource quarks

Syntax
       XrmQuark XrmUniqueQuark()

       #define XrmStringToName(string) XrmStringToQuark(string) #define XrmStringToClass(string) XrmStringToQuark(string) #define XrmStringToRep-
       resentation(string) XrmStringToQuark(string)

       XrmQuark XrmStringToQuark(string)
	  char *string;

       #define XrmNameToString(name) XrmQuarkToString(name) #define XrmClassToString(class) XrmQuarkToString(class) #define XrmRepresentation-
       ToString(type) XrmQuarkToString(type)

       char *XrmQuarkToString(quark)
	  XrmQuark quark;

       #define XrmStringToNameList(str, name) XrmStringToQuarkList((str), (name)) #define XrmStringToClassList(str,class) XrmStringToQuark-
       List((str), (class))

       void XrmStringToQuarkList(string, quarks_return)
	  char *string;
	  XrmQuarkList quarks_return;

       XrmStringToBindingQuarkList(string, bindings_return, quarks_return)
	  char *string;
	  XrmBindingList bindings_return;
	  XrmQuarkList quarks_return;

Arguments
       bindings_return
		 Returns the binding list.

       quark	 Specifies the quark for which the equivalent string is desired.

       quarks_return
		 Returns the list of quarks.

       string	 Specifies the string for which a quark is to be allocated.

Description
       The function allocates a quark that is guaranteed not to represent any string that is known to the resource manager.

       These functions can be used to convert to and from quark representations.  The string pointed to by the return value must not be modified
       or freed.  If no string exists for that quark, returns NULL.

       The function converts the specified resource quark representation back to a string.

       The function converts the null-terminated string (generally a fully qualified name) to a list of quarks.  Note that the string must be in
       the valid ResourceName format.  The components of the string are separated by a period or asterisk character.

       A binding list is a list of type and indicates if components of name or class lists are bound tightly or loosely (that is, if wildcarding
       of intermediate components is specified).

       typedef enum {XrmBindTightly, XrmBindLoosely} XrmBinding,
	    *XrmBindingList;

       indicates that a period separates the components, and indicates that an asterisk separates the components.

       The function converts the specified string to a binding list and a quark list.  Component names in the list are separated by a period or an
       asterisk character.  If the string does not start with period or asterisk, a period is assumed.	For example, ``*a.b*c'' becomes:

       quarks a       b      c
       bindings       loose  tightloose

See Also
       XrmGetResource(3X11), XrmInitialize(3X11), XrmMergeDatabases(3X11), XrmPutResource(3X11)
       X Window System: The Complete Reference, Second Edition, Robert W. Scheifler and James Gettys

															      XrmUniqueQuark(3X11)
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