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From: ark@alice.UUCP (Andrew Koenig)
Newsgroups: comp.lang.c
Subject: Re: evaluation order
Keywords: which way
Message-ID: <9901@alice.UUCP>
Date: 14 Sep 89 12:47:43 GMT
References: <9361@attctc.Dallas.TX.US>
Distribution: na
Organization: AT&T Bell Laboratories, Liberty Corner NJ
Lines: 24

In article <9361@attctc.Dallas.TX.US>, bobc@attctc.Dallas.TX.US (Bob Calbridge) writes:

> if (write(handle, buf, len=strlen(buf)) != len) do_something();

> can I be assured that 'len' will be assigned the length of 'buf' before it
> is used on the right side of the comparison operator.

No you can't.

However, you can be assured if you write it this way:

	len = strlen(buf);
	if (write(handle, buf, len) != len) do_something();

Is this so terrible?

You can even write it this way:

	if (len = strlen(buf), write(handle, buf, len) != len) do_something();

but I far prefer the previous way.
-- 
				--Andrew Koenig
				  ark@europa.att.com