Description
Given the attached knowledge base “students_courses.pl” containing students’ grades in some courses and courses’ prerequisites, you are required to write a Prolog program that solves the tasks explained below.
Task 1:
Get the list of students (IDs & grades in nested lists) who have taken a specific course.
Examples:
?- studentsInCourse(‘Robotics’, Students).
Students = [[stud06, 62], [stud09, 29]]
?- studentsInCourse(‘Algorithms’, Students).
Students = []
Task 2:
Get the number of students who have taken a specific course.
Examples:
?- numStudents(‘Algorithms’, Num).
Num = 0
?- numStudents(‘Math 1’, Num).
Num = 4
Task 3:
Get the maximum grade that a specific student was able to obtain.
Examples:
?- maxStudentGrade(stud10, MaxGrade). MaxGrade = 97
?- maxStudentGrade(stud08, MaxGrade).
MaxGrade = 71
Task 4:
Show a student’s grade digits in a specific course as a list of words.
Examples:
?- gradeInWords(stud04, ‘Database’, DigitsWords).
DigitsWords = [five, nine]
?- gradeInWords(stud07, ‘Math 2’, DigitsWords).
DigitsWords = [eight]
?- gradeInWords(stud01, ‘Programming 1’, DigitsWords).
DigitsWords = [nine, zero]
Task 5:
Get a list containing the sequence of courses that a student needs to take in order to be able to take the target course. The query must only succeed if the student has already taken and successfully passed a course that can directly or indirectly lead to the target.
Examples:
?- remainingCourses(stud01, ‘Advanced Algorithms’, Courses).
Courses = [‘OOP’, ‘Data Structures’, ‘Algorithms’] ?- remainingCourses(stud07, ‘Electronics 2’, Courses). false.
?- remainingCourses(stud02, ‘Networks’, Courses).
Courses = []
?- remainingCourses(stud05, ‘Computer Architecture’, Courses).
Courses = [‘Electronics 2’]
?- remainingCourses(stud08, ‘Data Warehouses’, Courses). false
