class Complex implements Comparable {

  private double real, imag;

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

  public double abs() {
    return Math.sqrt(this.real*this.real + imag*imag);
  }

  // Add the given complex number to self
  public void add(Complex c1) {
    this.real += c1.real;
    this.imag += c1.imag;
  }

  public static Complex subtract(Complex c1,
				 Complex c2) {
    return new Complex(c1.real-c2.real, c1.imag-c2.imag);
  }

  public void copyFrom(Complex c1) {
    real = c1.real;
    imag = c1.imag;
  }

  public void subtract(Complex c1) {
    Complex c3 = subtract(this, c1);
    copyFrom(c3);
    //this = c3;
  }

  int compareTo(Complex x) {
    double my_abs = abs();
    double x_abs = x.abs();
    if(my_abs < x_abs) { return -1; }
    else if(my_abs > x_abs) { return 1; }
    else { return 0; }
    // return abs() - x.abs();
  }

  public int compareTo(Object x) {
    System.out.println("Before cast");
    Complex x1 = (Complex)x;
    System.out.println("After cast");
    return compareTo(x1);
  }

  public static void main(String[] args) {
    Complex c1 = new Complex(0,0);
    Complex c2 = new Complex(0,3);
    Complex c3 = new Complex(2, 0);
    Complex[] A = {c1, c2, c3};
    GenericSort.sort(A);
    for(int i = 0; i < A.length; i++) {
      System.out.print("    "+A[i].abs()+",");
    }
    System.out.println();
    //String s1 = "abc";
    //System.out.println(c1.compareTo(s1));
  }

} // End class Complex