#!/usr/local/bin/perl
# deletepattern.pl
# open file.txt and
# delete rows between BEGIN_PATTERN and END_PATTERN
# and then print out to another .txt file



$BEGIN_PATTERN="first word or digit or else to delete";
$END_PATTERN="till need to delete ";

#just in case must type the file name from stdin, then use
# the "$ARGV[0]"
#ex: c:\script\deletepattern.pl file1.txt
#replace open(FH,"file1.txt") with open(FH,"$file")

#die "Usage: $0 filename\n" unless $ARGV[0];
#$file=$ARGV[0];

open(FH,"file1.txt") or die "Cannot open: file1.txt: $!\n";
while(<FH>) {
if(/$BEGIN_PATTERN/)  {
                        $is=1;
                      }
elsif(/$END_PATTERN/) {
                        $is=0;
                      }
next if $is;
print;

#print out to another file after parse and delete rows #from input file

open OUTPUT, ">>file2.txt" or die "Can't open output file: $!";
print OUTPUT;
close OUTPUT;

}
close FH;
print "\n";