fileをopenします。
open(my $in, "<", "test.dat") or die("could not open file.");
while(<$in>){
print $_;
}
close($in);
vagrant@vagrant-ubuntu-trusty-64:~/app$ cat test.dat
abc
def
ghi
123
456
789vagrant@vagrant-ubuntu-trusty-64:~/app$ perl hello.pl
abc
def
ghi
123
456
789
open(my $in, "<", "test.dat") or die("could not open file.");
open(my $out, ">", "test.out") or die("could not open file.");
while(<$in>){
print $out $_;
}
close($in);
close($out);
vagrant@vagrant-ubuntu-trusty-64:~/app$ perl hello.pl
vagrant@vagrant-ubuntu-trusty-64:~/app$ cat test.out
abc
def
ghi
123
456
789
書き込みですな。