src/CourseRegistrationStarter/Main.java

@@ -20,16 +20,5 @@ public class Main {
         shayan.dropCourse(M);
 
         shayan.showRegisteredCourses();
-
-
-
-        // TODO:
-        // 1. Create at least 3 courses
-        // 2. Create 1 student
-        // 3. Create a registration system
-        // 4. Add courses to the system
-        // 5. Register the student in some courses
-        // 6. Drop one course
-        // 7. Print the final registered course list
     }
 }

src/CourseRegistrationStarter/RegistrationSystem.java

@@ -10,20 +10,20 @@ public class RegistrationSystem {
 
     public void addCourseToSystem(Course c) {
         courses.add(c);
-        // TODO: Add the course to the system
     }
 
     public Course findCourseByCode(String code) {
-        for(int i = 0; i < courses.size(); i++){
+        for (int i = 0; i < courses.size(); i++)
             if (courses.get(i).getCourseCode().equals(code))
                 return courses.get(i);
-        }
-        // TODO: Search for a course by course code
-        // Return the matching course if found, otherwise return null
         return null;
     }
 
     public void showAllCourses() {
-        // TODO: Print all courses in the system
+        for (Course course : this.courses) {
+            System.out.println("----------------------------------------------");
+            System.out.printf("Course Name: %s| Course ID: %s | Capacity %d\n", course.getCourseName(), course.getCourseCode(), course.getCapacity());
+            System.out.println("----------------------------------------------");
+        }
     }
 }

src/CourseRegistrationStarter/Student.java

@@ -28,22 +28,17 @@ public class Student {
             c.reduceCapacity();
             return true;
         }
-        // TODO: Register the student in the course if capacity allows
-        // Return true if registration was successful, otherwise false
         return false;
     }
 
     public boolean dropCourse(Course c) {
         for(int i = 0; i < this.registeredCourses.size(); i++){
-            if (this.registeredCourses.get(i) == c){
-                this.registeredCourses.remove(c);
+            if (this.registeredCourses.get(i).getCourseCode().equals(c.getCourseCode())){
+                this.registeredCourses.remove(i);
                 c.increaseCapacity();
                 return true;
             }
         }
-        // TODO: Remove the course from the student's list
-        // Restore the course capacity if removal was successful
-        // Return true if the course was dropped, otherwise false
         return false;
     }
 
@@ -51,6 +46,5 @@ public class Student {
         for(int i = 0; i < registeredCourses.size(); i++){
             System.out.println(this.registeredCourses.get(i).getCourseName() + ", code: " + this.registeredCourses.get(i).getCourseCode());
         }
-        // TODO: Print all registered courses
     }
 }