Complete Student class (addCourse, dropCourse and showRegisteredCourses methods)

src/CourseRegistrationStarter/Student.java

@@ -23,6 +23,17 @@ 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(registeredCourses.contains(c)){
+            System.out.printf("%s is already registered for %s\n", c.getCourseName(), name);
+            return false;
+        }
+
+        if(c.reduceCapacity()){ // if enough capacity, reduction happens in this line
+            registeredCourses.add(c);
+            System.out.printf("%s registered successfully.\n", c.getCourseName());
+            return true;
+        }
         return false;
     }
 
@@ -30,10 +41,20 @@ public class Student {
         // 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.contains(c)){
+            registeredCourses.remove(c);
+            c.increaseCapacity();
+            System.out.printf("%s removed successfully.\n", c.getCourseName());
+            return true;
+        }
         return false;
     }
 
     public void showRegisteredCourses() {
         // TODO: Print all registered courses
+        for(Course thisCourse : registeredCourses){
+            System.out.printf("%s <%s>\n", thisCourse.getCourseName(), thisCourse.getCourseCode());
+        }
     }
 }