Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!rochester!udel!mmdf
From: talmage@lti.com (David Talmage)
Newsgroups: comp.sys.amiga
Subject: what's wrong with this picture?
Message-ID: <13919@louie.udel.EDU>
Date: 25 Apr 89 04:09:34 GMT
Sender: mmdf@udel.EDU
Lines: 33

>   Ok, I give up.  Why does the following (example code for a doubly-linked-
>   list) give the compiler warning "pointer/int conversion"?

>   struct aet {
>	   long x, y;
>	   float xIncr;
>	   struct aet *prev;
>	   struct aet *next;
>   };
>   struct aet *head, *last, *this;

>   head = (struct aet *) malloc(sizeof(struct aet));
>			       /* warning comes    ^ here */

I think I can answer this one.  It just bit me last week.

Try declaring malloc.  Probably like this:

	extern char *malloc();



Without the declaration, your compiler probably thinks malloc() returns an
integer.  With that (struct aet *) cast, the compiler thinks you're trying
to turn an integer into a pointer.


David Talmage

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