int do_ask(ai::PL::KnowledgeBase &kb, int interactive, char *buf, std::istream &in, std::ostream &out, const char *prompt)
{
ai::PL::Symbol::State rval;
ai::PL::KnowledgeBase question;
char *q = 0;
unsigned int len = strlen(prompt);
if(strlen(buf) > len)
{
q = &buf[len];
}
else
{
if(interactive)
{
out << prompt << "> " << std::flush;
}
in.getline(buf, BUF_SIZE);
q = buf;
}
question.AddSentence(q);
if(!interactive)
{
out << prompt << " " << *(question.GetSentences()[0]) << std::endl;
}
if(strcmp(prompt, "dpll") == 0)
{
rval = kb.DPLL_Entails(question);
}
else if(strcmp(prompt, "ask2") == 0)
{
rval = kb.TT_Entails_Pruned(question);
}
else if(strcmp(prompt, "ask") == 0)
{
rval = kb.TT_Entails(question);
}
else
{
out << "Unknown ask mode: " << prompt << std::endl;
rval = ai::PL::Symbol::UNKNOWN;
}
if(rval == ai::PL::Symbol::KNOWN_TRUE)
{
out << "YES, " << q << " is entailed." << std::endl;
}
else
{
out << "NO, " << q << " is not entailed." << std::endl;
}
out << kb.GetCount() << " evaluations." << std::endl;
return 0;
}
void tt_entails_test_aux(ai::PL::KnowledgeBase &kb,
ai::PL::KnowledgeBase &alpha)
{
ai::PL::Symbol::State rval;
rval = kb.TT_Entails(alpha);
std::cout << "KB" << std::endl << kb
<< "alpha" << std::endl << alpha
<< "result: " << rval
<< std::endl
<< std::endl;
}