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From: tim@proton.amd.com (Tim Olson)
Newsgroups: comp.lang.c
Subject: Re: sizeof and multi-dimensional arrays
Message-ID: <1991Jan5.210031.28797@mozart.amd.com>
Date: 5 Jan 91 21:00:31 GMT
References: <1991Jan5.050613.22303@Neon.Stanford.EDU> <fred.663069060@prisma>
Sender: usenet@mozart.amd.com (Usenet News)
Reply-To: tim@amd.com (Tim Olson)
Organization: Advanced Micro Devices, Austin, TX
Lines: 25

In article <fred.663069060@prisma> fred@prisma.cv.ruu.nl (Fred Appelman) writes:
| In <1991Jan5.050613.22303@Neon.Stanford.EDU> dkeisen@Gang-of-Four.Stanford.EDU (Dave Eisen) writes:
| 
| >Is the following a compiler bug or am I just confused?
| >
| >char x[2][3];
| >
| >  sizeof (*x)          gives 6
| >  sizeof (x[0])        gives 3.
| >
| >What's the scoop?
| >
| 
| You are just confused. 
| 'x' is a two dimensional array of 2*3 elments of type char. Makes a total of
| 6. 'x[0]' and 'x[1]' are arrays with a length of 3 elements. So both arrays
| have a size of 3.

That is correct, but the first sizeof is '*x', not 'x'.  Thus, it
appears to be a compiler bug -- they both should result in '3'.

--
	-- Tim Olson
	Advanced Micro Devices
	(tim@amd.com)