Re: How to get the return value from gprolog in C?

Sean Charles <[email protected]> Sun, 24 Nov 2013 10:12:59 +0000

Newsgroups	gmane.comp.gnu.prolog.general
Message-ID	<[email protected]>

Forgot to add… the code should probably be something like this (not tested) if you wanted to ask “anc(bob,john)”…

      Pl_Query_Begin(PL_TRUE);
      arg[0] = Pl_Mk_String(“bob");
      arg[1] = Pl_Mk_String(“john");
      res = Pl_Query_Call(func, 2, arg);

and then res will be NULL or NOT-NULL I guess to indicate true / false.