Mega Code Archive
The minimum implementation of a delegate
<![CDATA[
/*
C# Programming Tips & Techniques
by Charles Wright, Kris Jamsa
Publisher: Osborne/McGraw-Hill (December 28, 2001)
ISBN: 0072193794
*/
// Delegate.cs - Demonstrates the minimum implementation of a delegate
// Compile this program with the following command line:
// C:>csc Delegate.cs
//
namespace nsDelegate
{
using System;
public class Delegate21
{
// Declare the delegate type
public delegate double MathHandler (double val);
// Declare the variable that will hold the delegate
public MathHandler DoMath;
static public void Main ()
{
double val = 31.2;
double result;
Delegate21 main = new Delegate21();
// Create the first delegate
main.DoMath = new Delegate21.MathHandler (main.Square);
// Call the function through the delegate
result = main.DoMath (val);
Console.WriteLine ("The square of {0,0:F1} is {1,0:F3}",
val, result);
// Create the second delegate
main.DoMath = new Delegate21.MathHandler (main.SquareRoot);
// Call the function through the delegate
result = main.DoMath (val);
Console.WriteLine ("The square root of {0,0:F1} is {1,0:F3}",
val, result);
}
public double Square (double val)
{
return (val * val);
}
public double SquareRoot (double val)
{
return (Math.Sqrt (val));
}
}
}
]]>