Finish OOP assignment

src/CourseRegistrationStarter/Main.java

@@ -2,13 +2,24 @@ package CourseRegistrationStarter;
 
 public class Main {
     public static void main(String[] args) {
-        // 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
+        Course course1 = new Course( "Advanced Programming" , "AP1404" ,  2);
+        Course course2 = new Course( "Data Structures" , "DS2201" ,  1);
+        Course course3 = new Course( "Database Systems" , "DB3301" ,  3);
+
+        Student A = new Student( "Ali" , "402222001");
+
+        RegistrationSystem system = new RegistrationSystem();
+
+        system.addCourseToSystem(course1);
+        system.addCourseToSystem(course2);
+        system.addCourseToSystem(course3);
+
+        A.addCourse(course2);
+        A.addCourse(course3);
+
+        A.dropCourse(course2);
+
+        A.showRegisteredCourses();
+        system.showAllCourses();
     }
 }