use Inline CPP => Config => ENABLE => 'STD_IOSTREAM';
use Inline CPP;

print "g = ", g(12), "\n";

my ($a, $b, $c) = (1, 2, 3);
my ($x, $y, $z);
my $error = f($a, $b, $c, $x, $y, $z);
print " --> $x, $y, $z (e=$error)\n";

__END__
__CPP__

#include <iostream>
using namespace std;

int f(double a, double b, double c, double& x, double& y, double& z) {
    int error = -2;
    x = a +42;
    y = b +42;
    z = c +42;
    return error;
}

int g(int b) {
   return 42;
}
[download]

g = 42
Use of inherited AUTOLOAD for non-method main::f() is deprecated at ./
+z line 12.
Can't locate auto/main/f.al in @INC (@INC contains: ...)
[download]