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Re: Newline characters |
Stephen Edwards (edwards@CS.VT.EDU)
Thu, 27 Sep 2001 20:37:23 -0400
Message-ID: <3BB3C643.CE3E4A63@cs.vt.edu> Date: Thu, 27 Sep 2001 20:37:23 -0400 From: Stephen Edwards <edwards@CS.VT.EDU> Subject: Re: Newline characters
> I know there are a couple ways to test for the end of line
The preferred method is to call the boolean function Eoln to
detect newlines and to use readln to read in/skip over them.
> for some reason
> I will read in a newline character one time and my program will
> say it is an invalid token and then the next
> time it will recongize it as an end of expression token.
Remember that on PCs, a "new line" in a text file is represented
by a two-character sequence: a carriage return character (CR)
followed by a line feed character (LF). If you are reading one
character at a time, it will take two reads to process this
CR-LF pair. My guess is that you are only recognizing one of
the two characters as an end-of-expression token (probably the
linefeed).
-- Steve
-- Stephen Edwards 604 McBryde Hall Dept. of Computer Science e-mail : edwards@cs.vt.edu U.S. mail: Virginia Tech (VPI&SU) office phone: (540)-231-5723 Blacksburg, VA 24061-0106 -------------------------------------------------------------------------------
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