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Top Forums Programming To display unique lines in a Program Post 302536146 by Teju88 on Monday 4th of July 2011 08:08:49 AM
Old 07-04-2011
To display unique lines in a Program

I am new to C programming. I have been trying to display unique lines in a file from past two days. The problem is here,

I have a file whose contents are,
Code:
ras.beamtele.net
ras.beamtele.net
ras.beamtele.net
ras.beamtele.net
ras.beamtele.net
ras.beamtele.net
ras.beamtele.net
ras.beamtele.net
ras.beamtele.net
crawl-66-249-72-97.googlebot.com
27.61.242.247
27.61.242.247
27.61.242.247
27.61.242.247
27.61.242.247
1.23.209.154
27.61.242.247
1.23.209.154
1.23.209.154
1.23.209.154

and i need to display all unique lines. And the output should be,
Code:
ras.beamtele.net
crawl-66-249-72-97.googlebot.com
27.61.242.247
1.23.209.154.

Please help me how to do it using C language.
Thanks in advance.

Last edited by Franklin52; 07-04-2011 at 09:23 AM.. Reason: Please use code tags for code and data samples, thank you
 

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COMM(1) 							   User Commands							   COMM(1)

NAME
comm - compare two sorted files line by line SYNOPSIS
comm [OPTION]... FILE1 FILE2 DESCRIPTION
Compare sorted files FILE1 and FILE2 line by line. With no options, produce three-column output. Column one contains lines unique to FILE1, column two contains lines unique to FILE2, and column three contains lines common to both files. -1 suppress lines unique to FILE1 -2 suppress lines unique to FILE2 -3 suppress lines that appear in both files --check-order check that the input is correctly sorted, even if all input lines are pairable --nocheck-order do not check that the input is correctly sorted --output-delimiter=STR separate columns with STR --help display this help and exit --version output version information and exit AUTHOR
Written by Richard M. Stallman and David MacKenzie. REPORTING BUGS
Report comm bugs to bug-coreutils@gnu.org GNU coreutils home page: <http://www.gnu.org/software/coreutils/> General help using GNU software: <http://www.gnu.org/gethelp/> COPYRIGHT
Copyright (C) 2009 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
The full documentation for comm is maintained as a Texinfo manual. If the info and comm programs are properly installed at your site, the command info coreutils 'comm invocation' should give you access to the complete manual. GNU coreutils 7.1 July 2010 COMM(1)
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