popen is really much simpler than what you think, just have a look at the manpage.

If you want to use system, keep in mind that it does not return the output of the program you want to run, but since the command is interpreted by the shell you can actually redirect stdout and/or stderr with something like:

system("command -options args > outfile");

and then read outfile

A third, much more exciting alternative, is to play with pipe, fork, dup, exec and do yourself what popen does. After this, you'll treat shell writers with much more respect :-)

-- TMTOWTDI

In reply to Re: Re: Re: Invoking a perl program via an executable c++ program... by trantor
in thread Invoking a perl program via an executable c++ program... by kiat

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.