static void Main(string[] args)
{
// ==== Inheritance - Tính Kế Thừa ====
// is-a relationship
Samsung S8 = new Samsung();
S8.Name = "Samsung Galaxy S8";
// S8.OS = "Android";
S8.Call();
System.Console.WriteLine(S8.OS);
IPhone iphone7 = new IPhone();
iphone7.Siri();
System.Console.WriteLine(iphone7.OS);
// ==== Polymorphism - Tính Đa Hình ====
S8.Text();
iphone7.Text();
// handle data
Smartphone phone1 = new Samsung();
phone1.Call();
Smartphone phone2 = new IPhone();
phone2.Call();
Smartphone[] dataArray = new Smartphone[] { phone1, phone2 };
// ==== Abstract Class ====
Cat kitty = new Cat();
kitty.MakeSound();
}
static void Main(string[] args)
{
// Shape shape = new Shape();
// var area = shape.Area();
// var perimeter = shape.Perimeter();
// Console.WriteLine($"{area} and {perimeter}");
Rectangle rectangle = new Rectangle(10, 5);
var areaOfRectangle = rectangle.Area();
var perimeterOfRectangle = rectangle.Perimeter();
Console.WriteLine($"{areaOfRectangle} and {perimeterOfRectangle}");
Triangle triangle = new Triangle(3, 4, 5);
var areaOfTriangle = triangle.Area();
var perimeterOfTriangle = triangle.Perimeter();
Console.WriteLine($"{areaOfTriangle} and {perimeterOfTriangle}");
Shape[] arrayOfShapes = new Shape[3];
arrayOfShapes[0] = new Rectangle(4, 5);
arrayOfShapes[1] = new Triangle(12, 14, 15);
arrayOfShapes[2] = new Rectangle(10, 10);
foreach (Shape sh in arrayOfShapes)
{
Console.WriteLine(sh.GetType());
Console.WriteLine($"{sh.Area()} and {sh.Perimeter()}");
}
Animal c = new Cat();
c.MakeSound();
Animal d = new Dog();
d.MakeSound();
}