complete Cource class

src/CourseRegistrationStarter/Student.java

@@ -21,19 +21,29 @@ public class Student {
     }
 
     public boolean addCourse(Course c) {
-        // TODO: Register the student in the course if capacity allows
-        // Return true if registration was successful, otherwise false
+
+        if(c.getCapacity() > 0) {
+            registeredCourses.add(c);
+            c.reduceCapacity();
+            return true;
+        }
         return false;
     }
 
     public boolean dropCourse(Course c) {
-        // 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
+        if (registeredCourses.remove(c)) {
+            c.increaseCapacity();
+            return true;
+        }
         return false;
     }
 
     public void showRegisteredCourses() {
-        // TODO: Print all registered courses
+
+        for(int i=0 ; i < registeredCourses.size() ; i++) {
+            System.out.print(registeredCourses.get(i).getCourseName());
+            System.out.print("  ");
+            System.out.println(registeredCourses.get(i).getCourseCode());
+        }
     }
 }