NumComplejo.java

/**
 * Write a description of class NumComplejo here.
 *
 * @author (your name)
 * @version (a version number or a date)
 */
public class NumComplejo
{
    private double real;
    private double img;

    public NumComplejo() {
        this(0.0,0.0);
    }

    public NumComplejo(double r) {
        this(r,0.0);
    }

    public NumComplejo(double r, double i) {
        real = r;
        img = i;
    }

    public double obtReal() {
        return real;
    }

    public double obtImg() {
        return img;
    }

    public boolean sonIguales(NumComplejo otro) {
        return real == otro.real && img == otro.img;
    }

    public NumComplejo sumar(NumComplejo operDer) {
        return new NumComplejo(real + operDer.real, img + operDer.img);
    }

    public NumComplejo escalar(double r) {
        return new NumComplejo(real * r, img * r);
    }

    public NumComplejo multiplicar(NumComplejo operDer) {

        double real = this.real * operDer.real - this.img * operDer.img;
        double img = this.real * operDer.img + this.img * operDer.real;

        return new NumComplejo(real, img);
    }

    public NumComplejo restar(NumComplejo operDer) {
        return new NumComplejo(real - operDer.real, img - operDer.img);
    }

    public NumComplejo dividir(NumComplejo operDer) {
        final double DOS = 2.0;
        double dem = Math.pow(operDer.real, DOS)
                   + Math.pow(operDer.img, DOS);
        double real = (this.real * operDer.real + this.img * operDer.img);
        real /= dem;
        double img = (this.img * operDer.real - this.real * operDer.img);
        img /= dem;
        return new NumComplejo(real, img);
    }
}