Workshop-2

src/CourseRegistrationStarter/Main.java

@@ -1,14 +1,92 @@
 package CourseRegistrationStarter;
+import java.util.Scanner;
 
 public class Main {
     public static void main(String[] args) {
-        // TODO:
+
-        // 1. Create at least 3 courses
+        Course c1 = new Course("Advanced Programming", "AP1404", 2);
-        // 2. Create 1 student
+        Course c2 = new Course("Data Structures", "DS2201", 1);
-        // 3. Create a registration system
+        Course c3 = new Course("Database Systems", "DB3301", 3);
-        // 4. Add courses to the system
+        Course c4 = new Course("Basics of Programming", "BP4041", 0);
-        // 5. Register the student in some courses
+
-        // 6. Drop one course
+        RegistrationSystem system = new RegistrationSystem();
-        // 7. Print the final registered course list
+        system.addCourseToSystem(c1);
+        system.addCourseToSystem(c2);
+        system.addCourseToSystem(c3);
+        system.addCourseToSystem(c3);
+        system.addCourseToSystem(c4);
+
+
+
+        Student student = new Student("Soroush", "404222000");
+
+        Scanner scanner = new Scanner(System.in);
+
+        while (true) {
+            System.out.println("\n===== Course Registration Menu =====");
+            System.out.println("1. Show all courses");
+            System.out.println("2. Register course");
+            System.out.println("3. Drop course");
+            System.out.println("4. Show my courses");
+            System.out.println("5. Search course by name");
+            System.out.println("6. Exit");
+            System.out.print("Choose an option: ");
+
+            int choice = scanner.nextInt();
+            scanner.nextLine();
+
+            if (choice == 1) {
+                system.showAllCourses();
+            }
+            else if (choice == 2) {
+                System.out.print("Enter course code to register: ");
+                String code = scanner.nextLine();
+                Course course = system.findCourseByCode(code);
+                if (course == null) {
+                    System.out.print("Course not found.");
+                } else {
+                    student.addCourse(course);
+                }
+            }
+            else if (choice == 3) {
+                System.out.print("Enter course code to drop: ");
+                String code = scanner.nextLine();
+                Course course = system.findCourseByCode(code);
+                if (course == null) {
+                    System.out.print("Course not found.");
+                } else {
+                    student.dropCourse(course);
+                }
+            }
+            else if (choice == 4) {
+                student.showRegisteredCourses();
+            }
+            else if (choice == 5) {
+                System.out.print("Enter course name to search: ");
+                String name = scanner.nextLine();
+                Course course = system.findCourseByName(name);
+                if (course == null) {
+                    System.out.println("Course not found.");
+                } else {
+                    //boolean isRegistered = false;
+                    //for (int i = 0; i < student.registeredCourses.size(); i++) {
+                    //    if (student.registeredCourses.get(i).getCourseCode().equals(course.getCourseCode())) {
+                    //        isRegistered = true;
+                    //        break;
+                    //    }
+                    //}
+                    System.out.println("Course found: " + course.getCourseName() + " (" + course.getCourseCode() + ") - Remaining capacity: " + course.getCapacity());
+                    //System.out.println("Status: " + (isRegistered ? "Registered" : "Not Registered"));
+                }
+            }
+            else if (choice == 6) {
+                System.out.println("Exiting...");
+                break;
+            }
+            else {
+                System.out.println("Invalid choice.");
+            }
+        }
+        scanner.close();
     }
 }

src/CourseRegistrationStarter/RegistrationSystem.java

@@ -8,17 +8,45 @@ public class RegistrationSystem {
         courses = new ArrayList<>();
     }
 
+    // Adds the course to the system
     public void addCourseToSystem(Course c) {
-        // TODO: Add the course to the system
+        for (int i = 0; i < courses.size(); i++) {
+            if (courses.get(i).getCourseCode().equals(c.getCourseCode())) {
+                return;
+            }
+        }
+        courses.add(c);
     }
 
+    // Searches for a course by course code
     public Course findCourseByCode(String code) {
-        // TODO: Search for a course by course code
+        for (int i = 0; i < courses.size(); i++) {
-        // Return the matching course if found, otherwise return null
+            if (courses.get(i).getCourseCode().equals(code)) {
+                return courses.get(i);
+            }
+        }
         return null;
     }
 
+    // Searches for a course by course name
+    public Course findCourseByName(String name) {
+        for (int i = 0; i < courses.size(); i++) {
+            if (courses.get(i).getCourseName().equals(name)) {
+                return courses.get(i);
+            }
+        }
+        return null;
+    }
+
+    // Prints all courses in the system
     public void showAllCourses() {
-        // TODO: Print all courses in the system
+        if (courses.size() == 0) {
+            System.out.println("No courses found.");
+        } else {
+            for (int i = 0; i < courses.size(); i++) {
+                Course c = courses.get(i);
+                System.out.println(c.getCourseName() + " (" + c.getCourseCode() + ") - Remaining capacity: " + c.getCapacity());
+            }
+        }
     }
 }

src/CourseRegistrationStarter/Student.java

@@ -20,20 +20,51 @@ public class Student {
         return studentId;
     }
 
+    // Registers the student in the course if capacity allows
     public boolean addCourse(Course c) {
-        // TODO: Register the student in the course if capacity allows
+        if (registeredCourses.size() >= 2) {
-        // Return true if registration was successful, otherwise false
+            System.out.println("You've reached the maximum limit of 2 courses.");
+            return false;
+        }
+        for (int i = 0; i < registeredCourses.size(); i++) {
+            if (registeredCourses.get(i).getCourseCode().equals(c.getCourseCode())) {
+                System.out.println("You're already registered in this course.");
+                return false;
+            }
+        }
+        if (c.getCapacity() > 0) {
+            registeredCourses.add(c);
+            c.reduceCapacity();
+            System.out.println("Course registered successfully.");
+            return true;
+        }
+        System.out.println("Course capacity is full.");
         return false;
     }
 
+    // Removes the course from the student's list
     public boolean dropCourse(Course c) {
-        // TODO: Remove the course from the student's list
+        for (int i = 0; i < registeredCourses.size(); i++) {
-        // Restore the course capacity if removal was successful
+            if (registeredCourses.get(i).getCourseCode().equals(c.getCourseCode())) {
-        // Return true if the course was dropped, otherwise false
+                registeredCourses.remove(i);
+                c.increaseCapacity();
+                System.out.println("Course dropped successfully.");
+                return true;
+            }
+        }
+        System.out.println("You're already not registered in this course.");
         return false;
     }
 
+    // Prints all registered courses
     public void showRegisteredCourses() {
-        // TODO: Print all registered courses
+        if (registeredCourses.size() == 0) {
+            System.out.println("No courses registered yet.");
+        } else {
+            for (int i = 0; i < registeredCourses.size(); i++) {
+                Course c = registeredCourses.get(i);
+                System.out.println(c.getCourseName() + " (" + c.getCourseCode() + ") - Remaining capacity: " + c.getCapacity());
+            }
+        }
     }
 }