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From: gwyn@smoke.brl.mil (Doug Gwyn)
Newsgroups: comp.lang.c
Subject: Re: Passing pointers to structures
Keywords: pointer struct
Message-ID: <14903@smoke.brl.mil>
Date: 20 Jan 91 08:25:15 GMT
References: <1991Jan19.055923.19423@unicorn.cc.wwu.edu>
Organization: U.S. Army Ballistic Research Laboratory, APG, MD.
Lines: 27

In article <1991Jan19.055923.19423@unicorn.cc.wwu.edu> n8743196@unicorn.cc.wwu.edu (Jeff Wandling) writes:
-	struct node {
-		int key;
-		};
-	foo(h_ptr)
-	struct node *h_ptr;              /*   ?? */
-	{
-		h_ptr->key=10;		/* anything */
-        }	
-	main() 
-	{ 
-	      struct node *head;
-	      foo(head);  OR  foo(&head);   /* ?? K&R 1, p91 says use '&head'
-					       but this isn't the same. Or is
-			                       it?  */
-	}

What you probably wanted to do was:
	main()
	{
		struct node head;	/* NOTE: not just a pointer */
		foo(&head);		/* definitely not the same as
					   foo(head); which would pass
					   the entire structure rather
					   than just a pointer to it */
		return 0;		/* please return exit status */
	}