Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!seismo!columbia!rutgers!cbmvax!vu-vlsi!swatsun!rice
From: rice@swatsun (Dan Rice)
Newsgroups: comp.lang.c
Subject: Re: Writing readable code
Message-ID: <1213@carthage.swatsun.UUCP>
Date: Wed, 1-Jul-87 18:27:47 EDT
Article-I.D.: carthage.1213
Posted: Wed Jul  1 18:27:47 1987
Date-Received: Sat, 4-Jul-87 03:30:08 EDT
References: <8286@ut-sally.UUCP> <7001@alice.UUCP> <364@sol.ARPA> <1158@copper.TEK.COM>
Organization: Swarthmore College, Swarthmore PA
Lines: 28
Summary: Elementary C Question


	Here's a simple question for you.  Suppose I have defined structures
containing other structures, i.e., 

typedef struct {
	float x, y, z;	/* Coordinates of a vector in 3-space */
} vector;

typedef struct {
	vector o;	/* Center */
	float r;	/* Radius */
} sphere;

sphere s1, *s2;

Now, say I refer to s1.o.x and s2->o.y.  Does the compiler convert this into
a simple address reference at compile time, or is work performed at runtime?
Should I define

vector center;

center = s2->o;

if I plan to use s2->o several times?  Thanks for any help.
-- 
- Dan Rice, Swarthmore College, Swarthmore PA 19081
...!sun!liberty!swatsun!rice
 ...!seismo!bpa!swatsun!rice