perl 打开和关闭文件

#!/usr/bin/perl -w
use strict;

#print "please input a string
";
#my $line = <STDIN>;
#print $line;

#wirte a file
open(FH, ">aa.txt") or die $!;

print FH "hello
";#向文件写入内容
print FH "OK
";

close(FH);

#open a file
open(FH, "aa.txt") or die $!;
my @f = <FH>;#将文件内容读出
print @f;

close(FH);