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linked list in c problem

Started by PrettySneaky Jun 9, 2004 at 7:36 AM 13 replies 950+ views

Original Post

Jun 9, 2004 at 7:36 AM

I have just copy pasted this piece of code from one project to another.


typedef struct _BoundingVolume
{
	ExpandedVolume encloseVolume;
	
	Geometry *geom;
    
	_BoundingVolume	*leftChild;
	
	_BoundingVolume	*rightChild;

	Vec3f	h;

} BoundingVolume;

But VS .NET doesn't whant to compile it? I can't understand why because I have wrote and used this data type on a different program. I get this error message: error C2061: syntax error : identifier '_BoundingVolume' [edited by - SiCrane on June 9, 2004 5:34:11 PM]

evolutional

Mod

395

evolutional

Jun 9, 2004 at 7:45 AM

Have the other types you used been declared?

P.S. Generally ''bad'' language isn''t considered appropriate in the forums outside of the L*unge.

snk_kid

132

snk_kid

Jun 9, 2004 at 8:00 AM

Nothing wrong with that make sure your including the declartion of the types before _BoundingVolume.

PrettySneaky

Author

PrettySneaky

Jun 9, 2004 at 8:05 AM

Sorry about the bad language. This #¤%&#¤%& code just drives me insane.

I have defined the other datatypes above _BoundingVolume in my header.

AND, the code have worked on other projekt.. :[

Bah!

PrettySneaky

Author

PrettySneaky

Jun 9, 2004 at 8:30 AM

Ok!

I tried to an extremely simple linked list



typedef struct _ll
{
   _ll *next;
   int i;
} LL;

Still the same error message.. THIS SHOULD work. What the hell is wrong with my compiler. It do work if i start a new project and just define this single datatype och and declare it in the main func.. ??!?!

Namethatnobodyelsetook

118

Namethatnobodyelsetook

Jun 9, 2004 at 8:33 AM

Perhaps the thing immediately before it is missing a semicolon, or missing a closing brace. Usually errors that make no sense are because of a problem immediately above.

Another unlikely possibility is that you''ve #defined typedef or struct.

PrettySneaky

Author

PrettySneaky

Jun 9, 2004 at 8:41 AM

Doesn''t seem to be that. I defined the struct in several different files and compiled... Same error

And I have not define struct of typedef..

Ahh..

pTymN

Jun 9, 2004 at 8:41 AM

try this:

typedef struct STRUCTNAME_BLAH {
float x, y;
};

STRUCTNAME_BLAH myInstance;

I think that if you are using typedef, that you don''t want to have the variable declared in the same statement. I don''t remember exactly, but i''ve had the same problem before and did something similar to what i stated to fix it.

Paradigm Shifter

145

Paradigm Shifter

Jun 9, 2004 at 8:41 AM



typedef struct _ll
{
   struct _ll *next;
   int i;
} LL;

You need to use the non-typedef''d struct name if you want to have a pointer to its own type, with the word struct before it too.

"Most people think, great God will come from the sky, take away everything, and make everybody feel high" - Bob Marley

PrettySneaky

Author

PrettySneaky

Jun 9, 2004 at 8:46 AM

Yes!! Thanx!

I guess the reason that my code didn''t work was because that it is a pure c program. My old program that i ripped the code from whas a c++ program without OO.

Paradigm Shifter

145

Paradigm Shifter

Jun 9, 2004 at 8:53 AM

No problemo. Now wash your mouth out with soap!

"Most people think, great God will come from the sky, take away everything, and make everybody feel high" - Bob Marley

OOCCO

Jun 9, 2004 at 9:01 AM

Surely it should be



typedef struct _ll
{
   LL *next;
   int i;
} LL;

quorn

Jun 9, 2004 at 9:05 AM

You can change the title of your message by editing the original post. Maybe call it something like "C - problem declaring struct with pointers of own type as members". It does away with the expletive and is also a far better description of the problem.

Paradigm Shifter

145

Paradigm Shifter

Jun 9, 2004 at 10:19 AM

quote:
Original post by OOCCO
Surely it should be

typedef struct _ll
{
LL *next;
int i;
} LL;

That doesn''t work in ANSI C. The typedef name hasn''t been parsed by the time it sees the LL* declaration.

"Most people think, great God will come from the sky, take away everything, and make everybody feel high" - Bob Marley

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