You want to explicitly read from STDIN, not the magical ARGV, which only reads from STDIN if no argument are given (or to be precise, if @ARGV is empty). Replace your <> with <STDIN>.

And as a general advice: avoid write tools that ask the user questions: arguments are more flexible, as it makes piping and scripting easier. Imagine that each time you would run perl from the command line, it starts with: 

$ perl
Do you want to enable warnings? [y/N] n
Do you want to loop over the input? [y/N] y
   You want to loop over the input. Print $_ each time? [y/N]
... 40 questions later ...
Please type your one-liner, ending with a newline

[download]

In reply to Re: First time using Args by JavaFan
in thread First time using Args by mmusser

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.