How do I call a C function from a Perl program? [duplicate]

Question

test.c:

int sum(int a, int b)
{
    return (a+b);
}

test.pl:

# how do I call sum here?

Answer 1

use Inline C => <<'__END_OF_C__';

    int sum(int a, int b)
    {
        return (a+b);
    }

__END_OF_C__

say sum($x,$y);