How to match n number of newline character(\n) in lex and yacc Post: 302257858

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Match newline character "\n" in lex

Hi everyone! This is my very first post, sorry if I'm not posting in the right category. I'm trying to match a newline "/n" using lex/yacc. For example, print(9,'\n',8) should print 9 8 now do I write a regular expression to match exactly " '\n' " Thanks!

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How to remove newline character if it is the only character in the entire file.?

I have a file which comes every day and the file data look's as below. Vi abc.txt a|b|c|d\n a|g|h|j\n Some times we receive the file with only a new line character in the file like vi abc.txt \n

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yacc

YACC(1) 							   User Commands							   YACC(1)

NAME

       yacc - GNU Project parser generator

SYNOPSIS

       yacc [OPTION]... FILE

DESCRIPTION

       Yacc (Yet Another Compiler Compiler) is a parser generator.  This version is a simple wrapper around bison(1).  It passes option -y, --yacc
       to activate the upward compatibility mode.  See bison(1) for more information.

AUTHOR

       Written by Paul Eggert.

REPORTING BUGS

       Report bugs to <bug-bison@gnu.org>.

COPYRIGHT

       Copyright (C) 2008 Free Software Foundation, Inc.
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

SEE ALSO

       lex(1), flex(1), bison(1).

       The  full  documentation  for bison is maintained as a Texinfo manual.  If the info and bison programs are properly installed at your site,
       the command

	      info bison

       should give you access to the complete manual.

GNU Bison 2.4.1 						   November 2007							   YACC(1)

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