/**
 * Author: Josiah Yoder et al.
 * Class: SE1011-011
 * Date: 10/21/13 1:20 AM
 * Lesson: Week 7, Day 1
 */
public class Complex {
    private double real;
    private double imaginary;

    public Complex() {
        real = 0;
        imaginary = 0;
    }

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

    public Complex add(Complex other) {
        Complex result = new Complex();

        result.real = this.real + other.real;
        result.imaginary = this.imaginary + other.imaginary;
        return result;
    }

    /*
     * Arithmetic inverse (aka -c)
     */
    public Complex inverse() {
        Complex result = new Complex();

        result.real = -this.real;
        result.imaginary = -this.imaginary;
        return result;
    }

    /*
     * Subtract the other from this
     * this - other
     */
    public Complex subtract(Complex other) {
        Complex result = new Complex();

        return this.add(other.inverse());
//        return add(other.inverse()); // alternative.  Not as clear in this case.
    }

    /*
     * Add an imaginary number to the complex number
     *
     * imagineN -- "b" in the expression b*i that represents the imaginary number
     */
    public void addImaginary(double imagineN) {
        // need a & b
        // What do we have?
        // this.real;
        // this.imaginary;
        imaginary = imagineN + imaginary;
    }
}