static void Main(string[] args)
{
double temp = Temp.FahrenheitToCelsius(200);
//create a car instance
Car datsun = new Car("Datsun 100A", "red", 1.0, true, 2);
Car porsche = new Car("Porsche 911 RS3", "silver", 3.2, false, 2);
Car toyota = new Car("Toyota Camry", "blue", 2.0, true, 4);
datsun.Speed = 100;
porsche.Speed = 280;
toyota.Speed = 160;
// display car data
datsun.PrintData();
porsche.PrintData();
toyota.PrintData();
Console.ReadLine();
// accelerate, change car's speed value
datsun.Accelerate();
// display car data again, notice changed speed value!
datsun.PrintData();
Console.ReadLine();
}