#! /usr/bin/perluse strict;use utf8;binmode(STDIN,":encoding(utf8)");binmode(STDERR,":encoding(utf8)");binmode(STDOUT,":encoding(utf8)");&extend("/home/hqh/桌面/2",1,",","/home/hqh/桌面/1",1,",","/home/hqh/桌面/result");sub extend{    my($infile1,$col1,$sep1,$infile2,$col2,$sep2,$outfile)=@_;
　　#infile1和infile2为比较的两个文件,infile1第$col1列和infile2的第$col2列进行比较，输出到outfile中    open HD1,$infile1;    binmode(HD1,"encoding(utf8)");    my @data1=<HD1>;    close HD1;    open HD2,$infile2;    binmode(HD2,"encoding(utf8)");    my @data2=<HD2>;    close HD2;    open FD,">$outfile";    binmode(FD,":encoding(utf8)");    my %h;    foreach(@data1){        chomp($_);        my @temp=split($sep1,$_);        $h{$temp[$col1]}=1    }    foreach(@data2){        chomp($_);        my @temp=split($sep2,$_);        if(!exists($h{$temp[$col2]})){            print FD $temp[$col2],"\n";        }    }    close FD;    }