/* You have to use the following template to submit to Revel.
   Note: To test the code using the CheckExerciseTool, you will submit entire code.
   To submit your code to Revel, you must only submit the code enclosed between
     // BEGIN REVEL SUBMISSION

     // END REVEL SUBMISSION
*/ 
import java.util.Scanner;

public class Exercise13_17 {
  public static void main(String[] args) {
    Scanner input = new Scanner(System.in);
    System.out.print("Enter the first complex number: ");
    double a = input.nextDouble();
    double b = input.nextDouble();
    Complex c1 = new Complex(a, b);

    System.out.print("Enter the second complex number: ");
    double c = input.nextDouble();
    double d = input.nextDouble();
    Complex c2 = new Complex(c, d);

    System.out.println("(" + c1 + ")" + " + " + "(" + c2 + ")" + " = " + c1.add(c2));
    System.out.println("(" + c1 + ")" + " - " + "(" + c2 + ")" + " = " + c1.subtract(c2));
    System.out.println("(" + c1 + ")" + " * " + "(" + c2 + ")" + " = " + c1.multiply(c2));
    System.out.println("(" + c1 + ")" + " / " + "(" + c2 + ")" + " = " + c1.divide(c2));
    System.out.println("|" + c1 + "| = " + c1.abs());
    
    Complex c3 = (Complex)c1.clone();
    System.out.println(c1 == c3);
    System.out.println(c3.getRealPart());
    System.out.println(c3.getImaginaryPart());
    Complex c4 = new Complex(4, -0.5);
    Complex[] list = {c1, c2, c3, c4};
    java.util.Arrays.sort(list);
    System.out.println(java.util.Arrays.toString(list));
  }
}

// BEGIN REVEL SUBMISSION
class Complex implements Cloneable, Comparable<Complex> {
  private double a;
  private double b;

  // Write your code
}
// END REVEL SUBMISSION