Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!elroy.jpl.nasa.gov!lll-winken!unixhub!ditka!comeau
From: comeau@ditka.Chicago.COM (Greg Comeau)
Newsgroups: comp.lang.c++
Subject: Re: bug in istrstream example?
Message-ID: <38767@ditka.Chicago.COM>
Date: 13 May 91 18:46:02 GMT
References: <1991May11.015836.1556@neon.Stanford.EDU>
Sender: comeau@ditka.Chicago.COM (Greg Comeau)
Reply-To: comeau@csanta.attmail.com (Greg Comeau)
Organization: Comeau Computing
Lines: 19

In article <1991May11.015836.1556@neon.Stanford.EDU> philip@pescadero.stanford.edu (Philip Machanick) writes:
>  char s[] = "400"
>  istrstream iss (s,sizeof(s));
>appear. Presumably, sizeof is a bug (since this will always return the size of
>a pointer when applied to an array), and what is really required is strlen(s) -
>or should it be strlen(s)+1 to allow for the null char at the end?

No.  The array -> ptr conversion DO NOT occur when an array names
is used as the operand of sizeof.  The sizeof will return the total number
of bytes in s.

If s was : char s[] = "12345";, sizeof would return 6.

- Greg
-- 
	 Comeau Computing, 91-34 120th Street, Richmond Hill, NY, 11418
                          Producers of Comeau C++ 2.1
          Here:attmail.com!csanta!comeau / BIX:comeau / CIS:72331,3421
                     Voice:718-945-0009 / Fax:718-441-2310