Re: Calling external program in C++

jcoffin_at_taeus.com
Date: 12/15/04 

Date: 14 Dec 2004 16:26:01 -0800

> is there a C++ method of calling an external executable program?
> I know you can do it using C, but what about C++?

Here's one possibility you might find interesting (this was a quick
hack at overhauling some code I wrote _years_ ago that used an
ostrstream, so it might benefit from some cleanup):

#include <sstream>
#include <cstdlib>

using std::ostringstream;

ostringstream &execute(ostringstream &s)
{
std::system(s.str().c_str());
return s;
}

ostringstream &operator<<(ostringstream &s,
ostringstream &(*manip)(ostringstream &s))
{
return manip(s);
}

int main() {
ostringstream x;

x << "ls " << execute;

return 0;
}

If you want to see the original code, it's at:

http://groups-beta.google.com/group/comp.lang.c++/msg/a2940ddf50edf667

I have to admit that until I looked at the date on that post, I hadn't
quite realized how old this really was. :-) 

--
Later,
Jerry.
The universe is a figment of its own imagination.

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