改写代码

    #!/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,ce?bngbjn".   
        "axfvxf"); $_=$q; $q=~
          tr/f[a-z]/ [l-za-k]
            /;my@ever=1..&l
              ;my$mine=$q
                ;sub p{
                 print
                  @_;
                   }

           be $mine for @ever

代码输出