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The Icon Bar: Programming: C++ help!
 
  C++ help!
  (13:01 18/4/2001)
  johnstlr (13:06 18/4/2001)
    Phlamethrower (17:14 18/4/2001)
 
Phlamethrower Message #4759, posted at 13:01, 18/4/2001
Unregistered user I've stumbled across the following problem in some code I've been writing for Coder's Cauldron.

There's a class (Called ae) which uses rglApp pointers as a parameter in almost every function call. An rglApp is a struct, which contains numerous ae pointers.

That's where the problem lies - how can I define the ae and rglApp, without causing an error from not having the other one defined already? I'd rather not replace any of the pointers with voids, since the pointers get used so often in the code.

Would it be possible to, say, define the rglApp once using voids, then redefine it using ae's?

Any help would be greatly appreciated.

  ^[ Log in to reply ]
 
johnstlr Message #4760, posted at 13:06, 18/4/2001, in reply to message #4759
Unregistered user You can do a forward declaration of the class. I can't remember the exact syntax but it's something like

class ae;

struct rglApp
{
ae *pAe;
...
}

class ae
{
...
}

I'm a little curious as to how you got into this situation though. What is the relationship between rglApp and ae?

  ^[ Log in to reply ]
 
Phlamethrower Message #4761, posted at 17:14, 18/4/2001, in reply to message #4760
Unregistered user Thanks.

I'm a little curious as to how you got into this situation though. What is the relationship between rglApp and ae?

The ae's are the active edge list entries, and quite often they need to check whether they are the first item in the list (E.g. when the list is sorted). The pointer to the first item is kept in the rglApp, so in order for this to be correct the ae must know which rglApp to use.

  ^[ Log in to reply ]
 

The Icon Bar: Programming: C++ help!