Write a C# Program to Illustrate Array of Delegates

Write a C# Program to Illustrate Array of Delegates:

This C# Program Illustrates Array of Delegates. Here an array of delegate is created similar to that of normal declaration of the delegate.

Source code of the C# Program to Illustrate Array of Delegates. The C# program is successfully compiled and executed with Microsoft Visual Studio. The program output is also shown below.

ANS:

using System;
delegate double Measure(double R);
public class Circle
{
    const double PI = 3.14159;
    public double Diameter(double Radius)
    {
        return Radius * 2;
    }

    public double Circumference(double Radius)
    {
        return Diameter(Radius) * PI;
    }

    public double Area(double Radius)
    {
        return Radius * Radius * PI;
    }
}
public static class Program
{
    static int Main()
    {
        double R = 10;
        Circle circ = new Circle();
        Measure[] Calc = new Measure[3];
        Calc[0] = new Measure(circ.Diameter);
        double D = Calc[0](R);
        Calc[1] = new Measure(circ.Circumference);
        double C = Calc[1](R);
        Calc[2] = new Measure(circ.Area);
        double A = Calc[2](R);
        Console.WriteLine("Diameter:      {0}", D);
        Console.WriteLine("Circumference: {0}", C);
        Console.WriteLine("Area:          {0}\n", A);
        Console.ReadLine();
        return 0;
    }
}


Output:

Diameter              : 20
Circumference     : 62.8318
Area                     : 314.159