From:	nil AT hem1 DOT passagen DOT se (Nicklas Lindgren)
Newsgroups:	comp.os.msdos.djgpp
Subject:	static members
Date:	Wed, 08 Jul 1998 20:29:07 GMT
Organization:	Algonet/Tninet
Lines:	48
Message-ID:	<35a3d453.7807828@news.algonet.se>
NNTP-Posting-Host:	du93-5.ppp.algonet.se
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

I have made a class with a static member. The code compiles alright
but i get linking errors saying that they are undefined references.

Maybe i missed something. Here's the code:

//----intrface.h
...
class Interface {
protected:
  GraphicsInterface *gi;
  DataFile *data;
  Config *config;
public:
  Interface();
  virtual Interface *Update();
  virtual void Render();
  void SetGraphicsInterface(GraphicsInterface *Gi);
  void SetDataFile(DataFile *Data);
  void SetConfig(Config *C);
  static Interface killer; // ****** here it is
};

//----intrface.cc
...
#include "intrface.h"
...
Interface *InterfaceText::Update() {
  if (!key[KEY_ESC]) {
    return (this);
  }
  else {
    return (&killer); // ****** link error
  }
}

//----ticker.cc
...
#include "interface.h"
...
void Engine(Interface *I) {
  Interface *interface = I;
  do {
    interface = interface -> Update();
    interface -> Render();
  } while (interface != &Interface::killer); // ****** link error
}

	Nicklas Lindgren

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