Mega Code Archive
Illustrates the use of a multicast delegate
<![CDATA[
/*
Mastering Visual C# .NET
by Jason Price, Mike Gunderloy
Publisher: Sybex;
ISBN: 0782129110
*/
/*
Example12_2.cs illustrates the use of a multicast delegate
*/
using System;
// declare the DelegateCalculation delegate class
public delegate void DelegateCalculation(
double acceleration, double time
);
// declare the MotionCalculations class
class MotionCalculations
{
// FinalSpeed() calculates the final speed
public static void FinalSpeed(
double acceleration, double time
)
{
double finalSpeed = acceleration * time;
Console.WriteLine("finalSpeed = " + finalSpeed +
" meters per second");
}
// Distance() calculates the distance traveled
public static void Distance(
double acceleration, double time
)
{
double distance = acceleration * Math.Pow(time, 2) / 2;
Console.WriteLine("distance = " + distance + " meters");
}
}
public class Example12_2
{
public static void Main()
{
// declare and initialize the acceleration and time
double acceleration = 10; // meters per second per second
double time = 5; // seconds
Console.WriteLine("acceleration = " + acceleration +
" meters per second per second");
Console.WriteLine("time = " + time + " seconds");
// create delegate object that call the
// MotionCalculations.FinalSpeed() and
// MotionCalculations.Distance() methods
DelegateCalculation myDelegateCalculation1 =
new DelegateCalculation(MotionCalculations.FinalSpeed);
DelegateCalculation myDelegateCalculation2 =
new DelegateCalculation(MotionCalculations.Distance);
// create a multicast delegate object from
// myDelegateCalculation1 and
// myDelegateCalculation2
DelegateCalculation myDelegateCalculations =
myDelegateCalculation1 + myDelegateCalculation2;
// calculate and display the final speed and distance
// using myDelegateCalculations
myDelegateCalculations(acceleration, time);
}
}
]]>