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From: sven@cs.widener.edu (Sven Heinicke)
Newsgroups: comp.lang.c
Subject: Re: When do you use "if ( a = b )"? (was Re: Funny mistake)
Message-ID: <1991Mar17.161137.5081@cs.widener.edu>
Date: 17 Mar 91 16:11:37 GMT
References: <15481@smoke.brl.mil> <775@camco.Celestial.COM> <65837@eerie.acsu.Buffalo.EDU>
Organization: Widener CS Dept
Lines: 33
Nntp-Posting-Host: shirley.cs.widener.edu

In <65837@eerie.acsu.Buffalo.EDU>, chu@acsu.buffalo.edu writes:
>In article <775@camco.Celestial.COM> bill@camco.Celestial.COM (Bill Campbell) writes:
>[concerning "if ( a = b )"
>
>It's been my mistake everytime I've done it!! I realize that it is a
>legal construction and I know what it does, but I was wondering...
>Is there a good use for this?
>

I went through some of the programs that I wrote and here is probely
the best example of a good use for it that was kind of easy to
understand (if finds the greatest common demonator of a and b).  You
can write the program without in in the while statment but it was the
easest place I could find to put it.

int gcd(a,b)
     int a,b;
{ 
  int r,q;

  while(r = a%b)
    {
       q = a/b;
       a = b;
       b = r;
    }
  return(b);
}

-- 
sven@cs.widener.edu                                  Widener CS system manager
Sven Mike Heinicke                                          and Student
(pssmheinicke@cyber.widener.edu (if you must))