public Laptop(string model, decimal price, string manufacturer = null,
string processor = null, int? ram = null, string graphicsCard = null,
string hdd = null, Battery battery = null, string screen = null)
: this(model, price)
{
this.Manufacturer = manufacturer;
this.Processor = processor;
this.Ram = ram;
this.GraphicsCard = graphicsCard;
this.Hdd = hdd;
this.screen = screen;
this.Battery = battery;
}
static void Main()
{
Battery liLon = new Battery("Li-Ion, 4-cells, 2550 mAh", 5.0f);
Battery niCd = new Battery("Ni-Cd", 4.5f);
Laptop lenovo = new Laptop("Lenovo Yoga 2 Pro", (decimal)2259.00, "Lenovo",
"Intel Core i5-4210U (2-core, 1.70 - 2.70 GHz, 3MB cache)", 8,
"128GB SSD", "Intel HD Graphics 4400", liLon, "13.3\" (33.78 cm) – 3200 x 1800 (QHD+), IPS sensor display");
Laptop hp = new Laptop("HP 250 G2", (decimal)699.00);
Console.WriteLine(lenovo);
Console.WriteLine(hp);
}