static void Main()
{
Battery bat = new Battery("Li-Ion", 4, 2550);
Laptop first = new Laptop("Lenovo Yoga 2 Pro", 869.88, "Intel Core i5-4210U (2-core, 1.70 - 2.70 GHz, 3MB cache)", "Lenovo", 8, "Intel HD Graphics 4400", "128GB SSD", "13.3\" (33.78 cm) – 3200 x 1800 (QHD+), IPS sensor display", bat);
Laptop second = new Laptop("HP 250 G2", 699.00);
Console.WriteLine(first.ToString());
Console.WriteLine();
Console.WriteLine(second.ToString());
}
public Laptop(string model, double price, string cpu = null,
string oem = null, int ram = 0, string gpu = null,
string drive = null, string screen = null, Battery battery = null)
: this(model, price)
{
this.cpu = cpu;
this.oem = oem;
this.ram = ram;
this.gpu = gpu;
this.drive = drive;
this.screen = screen;
this.battery = battery;
}
