class Complex {

    private float real, imag;




    //////////////
    // Konstruktor

    Complex () {
        real = 0;
        imag = 0;
    }

    Complex(float re, float im) {
        real = re;
        imag = im;
    }




    ///////////
    // Methoden

    public void setRe(float re) {
        real = re;
    }

    public void setIm(float im) {
        imag = im;
    }

    public float getRe() {
        return real;
    }

    public float getIm() {
        return imag;
    }

    public String toString() {
	return "Complex: (" + real + " + j" + imag +")";
    }

    public static Complex xadd(Complex A, Complex B) {
		return new Complex(
			A.real + B.real,
			A.imag + B.imag
		);
    }

    public void add(Complex z) {
        real = real + z.real;
        imag = imag + z.imag;
    }

    public void sub(Complex z) {
        real = real - z.real;
	imag = imag - z.imag;
    }

    public void mul(Complex z) {
    	float a, b;
            a = real * z.real - imag * z.imag;
            b = imag * z.real + real * z.imag;

            real = a;
	    imag = b;
    }

    public void div(Complex z) {
    	float a, b;
            a = (real * z.real + imag * z.imag) /
                (z.real * z.real + z.imag * z.imag);
            b = (imag * z.real - real * z.imag) /
                (z.real * z.real + z.imag * z.imag);

            real = a;
            imag = b;
    }
}