explicit/implicit operator for Complex : Cast operator « Operator Overload « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Operator Overload
3. Cast operator

using System;

public struct Complex
{
    public Complex( double real, double imaginary ) {
        this.real = real;
        this.imaginary = imaginary;
    }

    // System.Object override
    public override string ToString() {
        return String.Format( "({0}, {1})", real, imaginary );
    }

    public double Magnitude {
        get {
            return Math.Sqrt( Math.Pow(this.real, 2) + Math.Pow(this.imaginary, 2) );
        }
    }

    public static implicit operator Complex( double d ) {
        return new Complex( d, 0 );
    }

    public static explicit operator double( Complex c ) {
        return c.Magnitude;
    }

    private double real;
    private double imaginary;
}

public class EntryPoint
{
    static void Main() {
        Complex cpx1 = new Complex( 1.0, 3.0 );
        Complex cpx2 = 2.0;         // Use implicit operator.

        double d = (double) cpx1;   // Use explicit operator.

        Console.WriteLine( "cpx1 = {0}", cpx1 );
        Console.WriteLine( "cpx2 = {0}", cpx2 );
        Console.WriteLine( "d = {0}", d );
    }
}

cpx1 = (1, 3)
cpx2 = (2, 0)
d = 3.16227766016838