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From: abed@saturn.wustl.edu (Abed M. Hammoud)
Newsgroups: comp.lang.c
Subject: Help with casts
Message-ID: <1991Feb21.040145.8678@cec1.wustl.edu>
Date: 21 Feb 91 04:01:45 GMT
Organization: Washington University, St. Louis MO
Lines: 34


	Hello, 

	This is probably not a smart question...so please forgive me..
	I am new to C, and I have been a couple of times encountering
	the term lvalue...I looked it up in K&R C book but I still don't
	get it...could some body please help me with a small description.

	I also have another small question, please take a look at
	the two loops below and tell me if there is any difference
	in speed.

		for (i=0; i < 100; i++)
		  x += i; 

		As compared to...

		for (i=0; i < 100; i++)
		  x += (float)i; 

	i.e my question is when I precede a variable by a cast does
	that add to the amount of work done during run-time ?.

	a fortran convert....

	thanks

	--------------------------------------------------------------
	| Abed  M. Hammoud			abed@saturn.wustl.edu|
	| Washington University.	        office:(314)726-7547 |
	| Electronic Systems & Signals Research Laboratory.          |
	| Dept. of Electrical/Biomedical Engineering.		     |
	| St.Louis Mo U.S.A                                          |
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