Enhanced ComplexNumber class C# Exercise - C# Programming Course

// Importing the System namespace to handle basic functionalities and console output
using System;

public class ComplexNumber
{
    // Real and imaginary parts of the complex number
    private double real;
    private double imaginary;

    // Constructor to set the real and imaginary parts
    public ComplexNumber(double real, double imaginary)
    {
        this.real = real;
        this.imaginary = imaginary;
    }

    // Getter for real part
    public double Real
    {
        get { return real; }
    }

    // Getter for imaginary part
    public double Imaginary
    {
        get { return imaginary; }
    }

    // Method to return a string representation of the complex number
    public string ToString()
    {
        return $"({real}, {imaginary})";
    }

    // Method to calculate the magnitude of the complex number (|a + bi| = sqrt(a^2 + b^2))
    public double GetMagnitude()
    {
        return Math.Sqrt(real * real + imaginary * imaginary);
    }

    // Overloading the + operator to add two complex numbers
    public static ComplexNumber operator +(ComplexNumber c1, ComplexNumber c2)
    {
        double realSum = c1.real + c2.real;
        double imaginarySum = c1.imaginary + c2.imaginary;
        return new ComplexNumber(realSum, imaginarySum);
    }

    // Overloading the - operator to subtract two complex numbers
    public static ComplexNumber operator -(ComplexNumber c1, ComplexNumber c2)
    {
        double realDifference = c1.real - c2.real;
        double imaginaryDifference = c1.imaginary - c2.imaginary;
        return new ComplexNumber(realDifference, imaginaryDifference);
    }
}

// Auxiliary class with the Main function to test the functionality of the ComplexNumber class
public class Program
{
    public static void Main()
    {
        // Create two ComplexNumber objects
        ComplexNumber complex1 = new ComplexNumber(3, 4);
        ComplexNumber complex2 = new ComplexNumber(1, 2);

        // Display the original complex numbers
        Console.WriteLine("Complex Number 1: " + complex1.ToString());
        Console.WriteLine("Complex Number 2: " + complex2.ToString());

        // Adding the two complex numbers using the overloaded + operator
        ComplexNumber sum = complex1 + complex2;
        Console.WriteLine("Sum: " + sum.ToString());

        // Subtracting the two complex numbers using the overloaded - operator
        ComplexNumber difference = complex1 - complex2;
        Console.WriteLine("Difference: " + difference.ToString());
        
        // Displaying the magnitude of the complex numbers
        Console.WriteLine($"Magnitude of Complex Number 1: {complex1.GetMagnitude()}");
        Console.WriteLine($"Magnitude of Complex Number 2: {complex2.GetMagnitude()}");
    }
}