that also does not call a function from the c++ code from within the power.pl script

That's correct - sub expo is simply being passed values that come from the C code (subs foo and bar).

foo.pl runs and executes bla() from the c++ script and gets some return value from the bla() func

That's the tricky bit ... well, "impossible" rather than "tricky", one suspects. I don't know how foo.pl could run bla() directly.

I also don't know why foo.pl would *need* to run bla() directly, given that bla()'s return value could be passed to foo.pl as an argument (as per the power.pl example already supplied). If the need to have foo.pl call bla() is a non-negotiable requirement, then I can't help at all with that aspect.
UPDATE: I now think I *can* envisage circumstances where it would be nice if foo.pl could call bla() directly - but I still have no idea how that could be achieved.

Thanks for an interesting question, btw. (I learned something in trying to answer it.)

Cheers,
Rob

In reply to Re^5: perl c++ perlembed question by syphilis
in thread perl c++ perlembed question by eth0nic

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.