// Bob Myers
// class Complex -- for creating complex number objects
//
// in-class example for CIS 3931

class Complex
{
   private double real = 0;
   private double imaginary = 0;

   public Complex()
   {
   }

   public Complex(double r)
   {
      this(r,0);
   }

   public Complex(double r, double i)
   {
      real = r;
      imaginary = i;
   }

   public Complex add(Complex c)
   {
      return new Complex(real + c.real, imaginary + c.imaginary);
   }

   public Complex subtract(Complex c)
   {
      Complex result = new Complex();
      result.real = real - c.real;
      result.imaginary = imaginary - c.imaginary;
      return result;
   }

   public Complex multiply(Complex c)
   {
      Complex result = new Complex();
      result.real = (real * c.real - imaginary * c.imaginary);
      result.imaginary = (real * c.imaginary + imaginary * c.real);
      return result;
   }

   public String toString()
   {
      return (real + " + " + imaginary + "i");
   }

   public static void main(String[] args)
   {
	Complex c1 = new Complex();
	Complex c2 = new Complex(5);
	Complex c3 = new Complex(3, 4);
	Complex c4 = new Complex(10, 5);

	System.out.println("c1 = " + c1.toString());
	System.out.println("c2 = " + c2);
	System.out.println("c2 = " + c3);
	System.out.println("c2 = " + c4);

	System.out.println("c1.add(c2) = " + c1.add(c2));
	System.out.println("c3.add(c4) = " + c3.add(c4));
	System.out.println("c2.subtract(c1) = " + c2.subtract(c1));
	System.out.println("c4.subtract(c3) = " + c4.subtract(c3));
   }








}