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Include terror

Started by Structural Sep 9, 2003 at 5:03 AM 6 replies 550+ views

Original Post

Sep 9, 2003 at 5:03 AM

I have this class: CGame, that has two objects CCLient. These CClients are member objects of the Game and are thus placed in the CGame header file. Now, I don''t want to include CClient.h in the CGame.h, but only in the .cpp file. How do I pull this off? How do I make the CClient class known in the CGame header file? It keeps complaining about "undefined classes". Do I HAVE to include CCLient.h in the CGame header file? This might result in circular inclusion when the project grows (as I''ve encouneterd before, and isn''t particulary pretty) TY

Qw3r7yU10p!

Sep 9, 2003 at 5:16 AM

If you just need a pointer to the object then use a forward declaration of the class before CGame. Otherwise you''ll have to include the header.

class CClient;

class CGame {
CClient* client_;
};

what does the C stand for in your class? (c:

civguy

Sep 9, 2003 at 5:21 AM

CYou cmust cinclude cthe cclient.h, cor cthe ccompiler cwon''t cknow chow clarge cthe cclass cgame cis (csince cthe cclients care cdirectly ccontained cwithing cgame).

UfoZ

Sep 9, 2003 at 5:44 AM

quote:
Original post by civguy
CYou cmust cinclude cthe cclient.h, cor cthe ccompiler cwon''t cknow chow clarge cthe cclass cgame cis (csince cthe cclients care cdirectly ccontained cwithing cgame).

Structural

Sep 9, 2003 at 8:06 AM

heh heh :D
I put the C infront of the class name so I don''t get constructions like "Game game;" which is just harder to read.

Anyway, so a pointer would do the trick without having to define the class. But an entire class as member would require the entire definition.

Qw3r7yU10p!

Sep 9, 2003 at 8:26 AM

quote:
Original post by Structural
Anyway, so a pointer would do the trick without having to define the class. But an entire class as member would require the entire definition.

correct

rypyr

Sep 9, 2003 at 10:17 AM

Yes, the reason for this is the compiler needs to know how big each class object will be. If it doesn''t know how big a CClient is, then it can''t determine how big a CGame is. However, pointers are a fixed size (on any particular platform).

Regards,
Jeff

civguy: nice one!

Structural

Sep 9, 2003 at 10:45 AM

aha. Learned something new again today

Thank you...

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