public GSM(string model, string manufacturer)
{
this.model = model;
this.manufacturer = manufacturer;
this.batteryCharacteristics = new Battery();
this.displayCharacteristics = new Display();
}
public GSM(string model, string manufacturer, double price, string owner, Battery battery, Display display)
{
this.model = model;
this.manufacturer = manufacturer;
this.price = price;
this.owner = owner;
this.batteryCharacteristics = battery;
this.displayCharacteristics = display;
}
public GSM(string model, string manufacturer, double price, string owner)
{
this.model = model;
this.manufacturer = manufacturer;
this.price = price;
this.owner = owner;
this.batteryCharacteristics = new Battery();
this.displayCharacteristics = new Display();
}