Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!utgpu!water!watnot!watmath!clyde!rutgers!ames!ucbcad!ucbvax!CORY.BERKELEY.EDU!dillon
From: dillon@CORY.BERKELEY.EDU.UUCP
Newsgroups: comp.sys.atari.st
Subject: sizeof("string")
Message-ID: <8704120143.AA11235@cory.Berkeley.EDU>
Date: Sat, 11-Apr-87 20:43:08 EST
Article-I.D.: cory.8704120143.AA11235
Posted: Sat Apr 11 20:43:08 1987
Date-Received: Sun, 12-Apr-87 06:07:33 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Lines: 29

>>In doing this I have found two (more!) bugs in Megamax:-
>>
>>  sizeof("anystring") returns 4 (the size of the pointer!!!!), not 10.
>
>Excuse me, but this doesn't sound like a bug...  If you take a look at
>K&R page 94, "In fact, any reference to an array is converted by the
>compiler to a pointer to the beginning of the array."  This means you're
>taking sizeof a pointer, which is in fact 4...(Remember, in C a string
>is no different from a null terminated array of characters.)


	Wrong, it should be 10.  Remember that sizeof() is special when it
comes to arrays.  sizeof() always returns the effective storage.

	char array[32];
	char *ptr;

	sizeof(array)		-result had better be 32

	The same goes for strings...

	sizeof("hello")		-result had better be 6 (it includes the \0)

	But pointers, on the other hand...

	sizeof(ptr)		-result is 4


			-Matt