Thanks for taking time to take look at my code. I think you misunderstand my issues. The issues is that I have two files and each files has the multiple sections, and each section contents the description of it. The problem I am want to do is to compare two files and only print out the sections and subsection within that are not in file1 and save to the third file. Your edited code is comparing all the lines but I want to compare the sections and ignore the lines within the section. For example, file2: (Section, eighteen, 3, 4, YELLOW HAIR 3, HIGH, 'this is a cattt 1) has 7 strings) and if the line (7 strings) does match with the line in file 1 then I want to print out the no match information ( ex: Section, eighteen 3, 4, YELLOW HAIR 3, HIGH, 'this is a cattt 1, cccccccccccccc kkkkkkkkkkkkkk... So far, my code print out just (Section, eighteen 3, 4, YELLOW HAIR 3, HIGH, 'this is a cattt 1, ) it does not print out the subsections that belongs to the section, like cccccccccccccc.... . Please help me figure out what is the issues with my code. Thanks so much in advance.

In reply to Re^2: compare two files and print the differences of file 2 in a third file by hopper
in thread compare two files and print the differences of file 2 in a third file by hopper

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.