static void Main(string[] args)
{
Rectangle rect1;
rect1.length = 4;
rect1.width = 5;
Console.WriteLine($"Area of the rect1 : {rect1.area()}");
Rectangle rect2 = new Rectangle(4, 5);
Console.WriteLine($"Area of the rect2 : {rect2.area()}");
rect1.length = 3;
rect2 = rect1;
Console.WriteLine($"Area of the rect2 : {rect2.area()}");
Animal fox = new Animal()
{
name = "Red",
sound = "Raaawww"
};
fox.info();
Animal cow = new Animal()
{
name = "Kinali",
sound = "Mööö"
};
cow.info();
Console.WriteLine($"Number of Animals : {Animal.getNumberOfAnimals()}");
Console.WriteLine($"Area of Rectangle is: {ShapeMath.GetArea("Rectangle",5,6)}");
Console.WriteLine($"Area of Circle is: {ShapeMath.GetArea("Circle", 5, 5)}");
}
static void Main(string[] args)
{
// Create a Rectangle
Rectangle rect1;
// Add values to it and run the Area method
rect1.length = 200;
rect1.width = 50;
Console.WriteLine("Area of rect1 : {0}",
rect1.Area());
// Use a constructor to create a Rectangle
Rectangle rect2 = new Rectangle(100, 40);
// If you assign one Rectangle to another
// you are setting the values and not
// creating a reference
rect2 = rect1;
rect1.length = 33;
Console.WriteLine("rect2.length : {0}",
rect2.length);
// ----- OBJECT ORIENTED PROGRAMMING -----
// A class models real world objects by
// defining their attributes (fields) and
// capabilities (methods)
// Then unlike with structs you can
// inherit from a class and create more
// specific subclass types
// Add a class Project -> Add Class
// Create an Animal object
// You could also assign values like
// fox.name = "Red"
Animal fox = new Animal()
{
name = "Red",
sound = "Raaaw"
};
// Call the static method
Console.WriteLine("Number of Animals {0}",
Animal.GetNumAnimals());
// You can also create static utility
// classes Project -> Add Class
Console.WriteLine("Area of Rectangle : {0}",
ShapeMath.GetArea("rectangle", 5, 6));
// ----- NULLABLE TYPES -----
// Data types by default cannot have a
// value of null. Often null is needed
// when you are working with databases
// and you can create a null type by
// adding a ? to the definition
int?randNum = null;
// Check for null
if (randNum == null)
{
Console.WriteLine("randNum is null");
}
// Another check for null
if (!randNum.HasValue)
{
Console.WriteLine("randNum is null");
}
Console.ReadLine();
}
