Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!cornell!uw-beaver!uw-june!pardo
From: pardo@june.cs.washington.edu (David Keppel)
Newsgroups: comp.lang.c
Subject: Type sizes
Summary: Are these correct?  Got your own favorites?
Keywords: bits precision types sizes
Message-ID: <5575@june.cs.washington.edu>
Date: 28 Aug 88 05:49:38 GMT
Reply-To: pardo@cs.washington.edu (David Keppel)
Organization: U of Washington, Computer Science, Seattle
Lines: 27

I'd like to know if the numbers and the rationalle are correct.
If you have other personal favorites, be sure to send them to me :-).


type		pdp11	VAX	68000	Cray-2	Unisys 1100	80386

char		8	8	8	8	9		8
short		16	16	8/16	32/64	18		8/16
int		16	32	16/32	32/64	36		16/32
long		32	32	32	64/64	36		32
char*		16	32	32	64/64	72		16/32/48
int*		16	32	32	24/64	72		16/32/48
int(*)()	16	16	16/64	64	576		16/32/48

Some machines have more than one possible size for a given type.
This can depend both on the compiler and on various compile-time
flags.

The *size* of an object does not guarantee the *precision* of that
object.  In particular, the Cray-2 may use 64 bits to store an |int|,
but a |long| cast into an |int| and back to a |long| may be truncated
to 32 bits.

	;-D on  ( Clint "programmer" Eastwood:  "Port *this*! )  Pardo
-- 
		    pardo@cs.washington.edu
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