Below is the question I need help on what I have is a program that reads the file prints what is read but I need a way to change what was read and then save it to the file that I opened. The exact wording of the problem is below. I also posted my attempt and work so far I am pretty stuck at the moment.

"write a Perl program that will allow the user to read some data from a file, and then give the user the option of modifying the price of an item, and then store the information back to a file that can be read again later. "

open(FH, "gp1data.txt") || die("Cannot open the file.");
print "$_";
while (<FH>){
    print "$_";
}
my %menu;
while (my $line2 = <$prices>) {
    chomp $line2;
    my @row = split(/-/, $line2);
    $menu{$row[0]} = $row[1];
}

[download]

The text file says Hamburger - 1.79 Cheeseburger - 2.00 Fries - 1.50

I need to be able to add or change the number of items and prices but I need to store them into a hash after reading the file.

In reply to Hashes and Associative Arrays by phizymonk

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.