LACS08_Complex.java

//Complex.java      Mrg 2012.0620
public class Complex
{
    private double re;
    private double im;

    public Complex(double re, double im)
    {
        this.re=re;
        this.im=im;
    }

    public String toString()
    {
        return "" + re + " + " + im + "i";
    }

    public double getRe()
    {
        return re;
    }

    public double getIm()
    {
        return im;
    }

    public Complex sum(Complex z)
    {
        double tempRe = this.re + z.getRe();
        double tempIm = this.im + z.getIm();
        return new Complex(tempRe, tempIm);
    }

    public Complex prod(Complex z)
    {
        double tempRe = this.re*z.getRe()-this.im*z.getIm();
        double tempIm = this.re*z.getIm()+this.im*z.getRe();
        return new Complex(tempRe,tempIm);
    }

    public double abs()
    {
        return Math.sqrt(re*re+im*im);
    }
}