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// Constant for maximum speed.

public const int MaxSpeed = 100;

// Internal state data.

private int currSpeed;

private string petName;

// Is the car still operational?

private bool carIsDead;

// A car has-a radio.

private Radio theMusicBox = new Radio();

// Constructors.

public Car() {}

public Car(string name, int currSp)

{

currSpeed = currSp;

petName = name;

}

public void CrankTunes(bool state)

{

// Delegate request to inner object.

theMusicBox.TurnOn(state);

}

// See if Car has overheated.

public void Accelerate(int delta)

{

if (carIsDead)

Console.WriteLine("{0} is out of order...", petName);

else

{

currSpeed += delta;

if (currSpeed > MaxSpeed)

{

Console.WriteLine("{0} has overheated!", petName);

currSpeed = 0;

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carIsDead = true;

}

else

Console.WriteLine("=> CurrSpeed = {0}", currSpeed);

}

}

}

Now, if we were to implement a Main() method that forces a Car object to exceed the prede-

fined maximum speed as shown here:

static void Main(string[] args)

{

Console.WriteLine("***** Simple Exception Example *****");

Console.WriteLine("=> Creating a car and stepping on it!");

Car myCar = new Car("Zippy", 20);

myCar.CrankTunes(true);

for (int i = 0; i < 10; i++)

myCar.Accelerate(10);

Console.ReadLine();

}

we would see the output displayed in Figure 7-1.

Figure 7-1.

The Car in action