static void Main(string[] args)
{
Book classOfAvengers = new Book();
Student spiderman = new Student("Peter", "Parker", new Subject("Math", 80.3f));
Student ironman = new Student("Tony", "Stark", new Subject("Math", 78f));
Student hulk = new Student("Bruce", "Banner", new Subject("Math", 92.7f));
classOfAvengers.AddStudent(spiderman);
classOfAvengers.AddStudent(ironman);
classOfAvengers.AddStudent(hulk);
Book.PrintStudents(classOfAvengers);
}
