/** Complex - implements a complex number
*/
public class Complex
{
    private double real,        // the real part
                   imag;        // the imaginary

    public Complex(double r, double i)
    {
        real = r;
        imag = i;
    }
    public Complex(Complex c)
    {
        real = c.getReal();
        imag = c.getImag();
    }
    public double getReal() { return real; }

    public double getImag() { return imag; }

    public void add(Complex c)
    {
        real += c.getReal();
        imag += c.getImag();
    }
    public void multiply(Complex c)
    {
        double temp = real * c.getReal() - imag * c.getImag();

        imag = real * c.getImag() + imag * c.getReal();
        real = temp;
    }
    public double sizeSquared()
    {
        return real*real + imag*imag;
    }
}