Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!yale!cmcl2!adm!smoke!gwyn
From: gwyn@smoke.BRL.MIL (Doug Gwyn)
Newsgroups: comp.std.c
Subject: Re: Simple questions about array declarations
Message-ID: <12235@smoke.BRL.MIL>
Date: 26 Feb 90 19:17:59 GMT
References: <25E833AA.15362@paris.ics.uci.edu>
Reply-To: gwyn@brl.arpa (Doug Gwyn)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 46

In article <25E833AA.15362@paris.ics.uci.edu> rfg@paris.ics.uci.edu (Ronald Guilmette) writes:
-Does this mean that the following declaration is illegal?
-	int array1[3] = { 1,2,3 };	/* size is known! */

No, array1 has object type.

-How about the following pair of declarations?  Are these legal or illegal?
-	extern int array2[3];
-	int array2[] = { 1,2,3 };	/* size is known! */

array2 has object type.

-Now assuming that the above pair of declarations is legal, how about the
-following pairs?  Are these legal?
-	extern int array3[4];		/* size = 4 words */
-	int array3[] = { 1,2,3 };	/* size = 3 words! */

array3 has object type.  Because you omitted the fourth initializer,
array3[3] starts off containing a 0 value.

-	extern int array4[3];		/* size = 3 words */
-	extern array4[] = { 1,2,3,4 };	/* size = 4 words */

array 4 has object type.  You have specified too many initializers
and should get a diagnostic.

-	extern int array5[4];
-	int array5[3];

These types are not compatible; error.

-	extern int array6[3];
-	int array6[4];

Ditto.

-	static int array7[];
-	static int array7[3] = { 1,2,3 };
-	static int array8[3];
-	static int array8[3] = { 1,2,3 };
-	static int array9[3];
-	static int array9[] = { 1,2,3 };
-	static int array10[];
-	static int array10[] = { 1,2,3 };

All these are okay.