Prolog Lab 3 University of Wales, Cardiff

This exercise is not assessed, but it is in your interest to practise this, because SOON there might be one that is.

It was mentioned in the lectures that Prolog can be used as a database, where relations could be analysed using queries combined with AND / OR operations.
A database containing information about students, lecturers, courses and individual lectures contains relations of the type :
course(CourseNo,Ctitle, Clecturer)
lecture(LectureNo, CourseNo, Ltitle)
attended(StudentName, CourseNo, LectureNo)

The database is as follows :

course(122, c_programming, dave_marshall).
course(233, operating_systems, jeremy_smith).
course(325, expert_systems, andrew_jones).
course(422, neural_networks, antonia_jones).
course(256, databases, alex_grey).

lecture(1, 122, introduction).
lecture(2, 122, basic_syntax).
lecture(3, 122, memory_management).
lecture(4, 122, pointers).
lecture(1, 233, introduction).
lecture(2, 233, kernel).
lecture(1, 325, introduction).
lecture(2, 325, trees).
lecture(3, 325, predicate_calculus).
lecture(1, 422, introduction).
lecture(2, 422, backpropagation).
lecture(3, 422, gamma_test).
lecture(1, 256, introduction).
lecture(2, 256, oracle).
lecture(3, 256, processing_queries).

attended(willaim_parsons, 422,1).
attended(william_parsons, 422,2).
attended(william_parsons, 325,1).
attended(william_parsons, 325,2).
attended(william_parsons, 325,3).
attended(james_smith, 122, 1).
attended(james_smith, 122, 2).
attended(james_smith, 122, 3).
attended(james_smith, 122, 4).
attended(james_smith, 233, 2).
attended(helen_randall, 256,1).
attended(helen_randall, 256,2).
attended(helen_randall, 256,3).
attended(helen_randall, 233,1).
attended(helen_randall, 422,1).

Note : The above data is available as a text file at
http://www.cs.cf.ac.uk/User/O.F.Rana/prolog/exercise3.txt or via
the course web page at :
http://www.cs.cf.ac.uk/User/O.F.Rana/prologpage.html

Write the following Prolog clauses :

1. taught_by(StudentName, LecturerName) - student StudentName was taught by lecturer LecturerName
2. was_at(StudentName, Coursetitle, Lecturetitle) - student StudentName was at lecture titled Lecturetitle on course titled Coursetitle
3. pursued_course(StudentName, CourseNo) - student named StudentName pursued course CourseNo
4. Add a simple user interface to the three clauses above. Can you combine the three into one dialog which uses check boxes or radio buttons. Write a clause to incorporate the user interface features.
5. Add another clause which suggests that the student was a poor course attender - i.e. he/she pursued a given course, but there is some lecture within that course he/she did not attend
   poor_attender(StudentName) - student named StudentName is a poor attender
6. Change your clauses to be able to add (append) and delete (retract) information dynamically from the database.
7. Amend the program so that each person (students and lecturers alike) is given a unique number, and a name_of clause associates the person's name and number

Omer Rana
February 1997.

 
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