static void Main(string[] args) { Person person = new Person(); Person student = new Student(); Person teacher = new Teacher(30); person.SayHello(); student.SetAge(21); student.SayHello(); student.ShowAge(); teacher.SayHello(); teacher.Explain(); }
static void Main(string[] args) { Person p = new Student(); p.SayHello(); Student s1 = new Student(); s1.SetAge(21); s1.SayHello(); s1.ShowAge(); Teacher t = new Teacher(); t.SetAge(30); t.SayHello(); t.Explain(); }