CITS-3005-labs-knowledge-re.../lab1-logic-programming.pl
2023-08-06 17:51:54 +08:00

34 lines
809 B
Prolog

% Lab 1 - logic programming
% LABSHEET:
% https://teaching.csse.uwa.edu.au/units/CITS3005/labs/lab01-logic-programming.pdf
student(jane).
student(tim).
student(cris).
unit(cits3005).
unit(cits2211).
prerequisite(cits2211,cits3005).
mark(cits3005,jane,Result) :- Result is 50.
mark(cits2211,jane,Result) :- Result is 57.
mark(cits2211,tim,Result) :- Result is 30.
mark(cits2211,cris,Result) :- Result is 60.
eligible(Student,Unit) :-
student(Student),
unit(Unit),
(
% CASE 1: Unit has no prerequisites
\+ prerequisite(_, Unit),
!;
% CASE 2: Unit has prerequisites AND Student's mark in the prerequisite unit >= 50
prerequisite(PreUnit,Unit),
mark(PreUnit,Student,Result),
Result >= 50
).