| four_crosses :- | |
| prompt("What are the two items to cross?",_Two_items), | |
| cross,cross,cross, | |
| prompt("What is their cross?",_Cross11). | |
| cross :- | |
| prompt("What is their cross?",_Cross11), | |
| prompt("What is at the same level as this?",_Cross12). | |
| prompt(Prompt,String) :- | |
| writeln(Prompt), | |
| read_string(user_input, "\n", "\r", _End, String). |