Mega Code Archive
Illustrates polymorphism
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/*
Mastering Visual C# .NET
by Jason Price, Mike Gunderloy
Publisher: Sybex;
ISBN: 0782129110
*/
/*
Example7_2.cs illustrates polymorphism
*/
using System;
// declare the MotorVehicle class
class MotorVehicle
{
// declare the fields
public string make;
public string model;
// define a constructor
public MotorVehicle(string make, string model)
{
this.make = make;
this.model = model;
}
// define the Accelerate() method (may be overridden in a
// derived class)
public virtual void Accelerate()
{
Console.WriteLine(model + " accelerating");
}
}
// declare the Car class (derived from MotorVehicle)
class Car : MotorVehicle
{
// define a constructor
public Car(string make, string model) :
base(make, model)
{
// do nothing
}
// override the base class Accelerate() method
public override void Accelerate()
{
Console.WriteLine("Pushing gas pedal of " + model);
base.Accelerate(); // calls the Accelerate() method in the base class
}
}
// declare the Motorcycle class (derived from MotorVehicle)
class Motorcycle : MotorVehicle
{
// define a constructor
public Motorcycle(string make, string model) :
base(make, model)
{
// do nothing
}
// override the base class Accelerate() method
public override void Accelerate()
{
Console.WriteLine("Twisting throttle of " + model);
base.Accelerate(); // calls the Accelerate() method in the base class
}
}
public class Example7_2
{
public static void Main()
{
// create a Car object and call the object's Accelerate() method
Car myCar = new Car("Toyota", "MR2");
myCar.Accelerate();
// create a Motorcycle object and call the object's Accelerate() method
Motorcycle myMotorcycle = new Motorcycle("Harley-Davidson", "V-Rod");
myMotorcycle.Accelerate();
}
}
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