Object-oriented programming I

2) Type "ezperl filename" on ella. Ezperl creates a perl file called filename.plx and executes it. If you should get error messages, they refer to the perl file and not the pseudo-code. That means line numbers may be incorrect. (Ask the instructor for help.)

3) Ezperl expects one command per line. If you want to extend a command over several lines add a backward slash (\) at the end of every line to be continued.

class Student
    properties
        $name
        @courses
    /properties

    method printDetails
        print "Name: Student.name\n"
        print "Courses: Student.courses\n"
    /method

    method enroll in $course
        push (Student.courses, $course)
    /method
/class
#########################################
main

    $student1 = new Student (name "Fred", courses "L548" "L505")

    print "Input the courses which $student1.name is enrolled in.\n"
    print "When finished, type X.\n"
    $newcourse = <STDIN>
    chomp $newcourse

    while ($newcourse ne "X" && $newcourse ne "x")
        $student1.enroll(in $newcourse)
        $newcourse = <STDIN>
        chomp $newcourse
    /while

    $student1.printDetails
/main                     

Exercises

Add further attributes to the student class (phone number, email address, degree, etc). Note: you need "\@" instead of "@" in the email address. (That's Perl's fault not Ezperl's!)

Create an array of students. Let users add new students to the array. Ask the user for the name of a student and then print his/her details.

Create a method creditHours that computes the number of credit hours for a student assuming that every class is a three credit class. (Note: Ezperl does not support special variables such as $#array. The length of an array can be obtained by using it in a scalar context - same as in Perl.)

Create a class Employee that contains information about names, ages and positions. What could be useful methods for the class?