// Copyright (c) 2001

package Imaginary;

/**
 * Imaginary.Complex
 * 

 * @author Michael A. Elms
 * Complex Numbers are written in the form a+bi
 */
public class Complex {

  int a;
  int b;

  /**
   * Constructor
   */
  public Complex(int a) {
    this.a = a;
    this.b = 0;
  }

  public Complex(int a, int b) {
    this.a = a;
    this.b = b;
  }

  public void printComplex(Complex c) {
    System.out.println("printComplex(Complex c)");

    if (c.a != 0)
    {
      if (c.b > 0) System.out.println(c.a + " + " + c.b + "i");
      else if (c.b == 0) System.out.println(c.a);
      else System.out.println(c.a + " + (" + c.b + "i)");
    }
    else System.out.println(c.b + "i");
  }

  public void printComplex() {
    System.out.println("printComplex()");

    if (this.a != 0)
    {
      if (this.b > 0) System.out.println(this.a + " + " + this.b + "i");
      else if (this.b == 0) System.out.println(this.a);
      else System.out.println(this.a + " + (" + this.b + "i)");
    }
    else System.out.println(this.b + "i");
  }

  public String toString() {
    String temp;
    Complex c = this;

    if (c.a != 0)
    {
      if (c.b > 0) temp = c.a + " + " + c.b + "i";
      else if (c.b == 0) temp = c.a + "";
      else temp = c.a + " + (" + c.b + "i)";
    }
    else temp = c.b + "i";

    temp = "(" + temp + ")";

    return temp;
  }

  public Complex addComplex(Complex num1, Complex num2) {
    System.out.println("addComplex");
    Complex result = new Complex(0, 0);

    System.out.println("I want to add " + num1.toString() + " to " + num2.toString());
    result.a = num1.a + num2.a;
    result.b = num1.b + num2.b;

    System.out.println("The result is " + result.toString());
    
    return result;
  }

  public Complex add(Complex num1) {
    System.out.println("add");
    Complex result = new Complex(0, 0);

    System.out.println("I want to add " + this.toString() + " to " + num1.toString());
    result.a = this.a + num1.a;
    result.b = this.b + num1.b;

    System.out.println("The result is " + result.toString());
    
    return result;
  }


  /**
   * main
   * @param args
   */
  public static void main(String[] args) {
    System.out.println("Main");
    Complex complex = new Complex(1, 2);
    complex.printComplex(complex);

    Complex c1 = new Complex(1, 2);
    Complex c2 = new Complex(4, 0);
    Complex c3 = new Complex(1,-2);

    Complex c4 = new Complex(10);
    Complex c5 = new Complex(0, -10);

    c1.printComplex(c1);
    c2.printComplex(c2);
    c3.printComplex(c3);

    c1.printComplex();
    c2.printComplex();
    c3.printComplex();

    c4.printComplex(c4);
    c5.printComplex(c5);

    complex.addComplex(c1, c2);
    complex.addComplex(c1, c3);

    c1.add(c2);
    c1.add(c3);

    Complex result;
    result = c1.add(c3);
    System.out.println("The Result is " + result.toString());

    result = c1.add(c2);
    System.out.println("The Result is " + result.toString());
  }
}


Results:
Main
printComplex(Complex c)
1 + 2i
printComplex(Complex c)
1 + 2i
printComplex(Complex c)
4
printComplex(Complex c)
1 + (-2i)
printComplex()
1 + 2i
printComplex()
4
printComplex()
1 + (-2i)
printComplex(Complex c)
10
printComplex(Complex c)
-10i
addComplex
I want to add (1 + 2i) to (4)
The result is (5 + 2i)
addComplex
I want to add (1 + 2i) to (1 + (-2i))
The result is (2)
add
I want to add (1 + 2i) to (4)
The result is (5 + 2i)
add
I want to add (1 + 2i) to (1 + (-2i))
The result is (2)
add
I want to add (1 + 2i) to (1 + (-2i))
The result is (2)
The Result is (2)
add
I want to add (1 + 2i) to (4)
The result is (5 + 2i)
The Result is (5 + 2i)