学步园

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

         my$f=           $[;my
       $ch=0;sub       l{length}
     sub r{join"",   reverse split
    ("",$_[$[])}sub ss{substr($_[0]
    ,$_[1],$_[2])}sub be{$_=$_[0];p
     (ss($_,$f,1));$f+=l()/2;$f%=l 
      ();$f++if$ch%2;$ch++}my$q=r
       ("\ntfgpfdfal,thg?bngbj".    
        "naxfcixz");$_=$q; $q=~
          tr/f[a-z]/ [l-za-k]
            /;my@ever=1..&l
              ;my$mine=$q
                ;sub p{
                 print
                  @_;
                   }

           be $mine for @ever

perl -MO=Deparse heart_raw.pl > heart_deparse.pl

BEGIN { $^W = 1; }
use strict 'refs';
my $f = $[;
my $ch = 0;
sub l {
length $_;
}
sub r {
join '', reverse(split(//, $_[0], 0));
}
sub ss {
substr $_[0], $_[1], $_[2];
}
sub be {
$_ = $_[0];
p(ss($_, $f, 1));
$f += l() / 2;
$f %= l();
++$f if $ch % 2;
$ch++;
}
my $q = r("\ntfgpfdfal,thg?bngbjnaxfcixz");
$_ = $q;
$q =~ tr/[]a-z/[]l-p r-za-k/;
my(@ever) = 1 .. &l;
my $mine = $q;
sub p {
print @_;
}
be $mine foreach (@ever);

#打开警告开关
BEGIN { $^W = 1; }

#符号引用检查
use strict 'refs';

#数组中第一个元素的索引号
my $f = $[;
my $ch = 0;

#注意字符串中有个换行符
my $q = r("\ntfgpfdfal,thg?bngbjnaxfcixz");
$_ = $q;
$q =~ tr/[]a-z/[]l-p r-za-k/;

my (@ever) = 1 .. &l;
my $mine = $q;

be($mine) foreach (@ever);

#获取字符串的长度
sub l {
length $_;
}

#反转字符串
#join, 0均为凑数用，可以省略
sub r {
join '', reverse( split( //, $_[0], 0 ) );
}

#提取字符串中的子串
sub ss {
substr $_[0], $_[1], $_[2];
}

#输出
sub p {
print @_;
}

#从字符串的前半段和后半段交替提取一个字符并输出
sub be {
$_ = $_[0];
p( ss( $_, $f, 1 ) );
$f += l() / 2;
$f %= l();
++$f if $ch % 2;
$ch++;
}

#!/usr/bin/env perl

use strict;
use warnings;
use utf8;

my $pointer = 0;
my $character = 0;
my $string = reverse("\ntfgpfdfal,thg?bngbjnaxfcixz");
$string =~ tr/a-z/l-p r-za-k/;
foreach ( 1 .. length($string) ) {
print substr( $string, $pointer, 1 );
$pointer += length($string) / 2;
$pointer %= length($string);
++$pointer if $character % 2;
$character++;
}

kristen, will you marry me?