public class Complex {
    public double x,y;
    public Complex (double x, double y) {
        this.x = x;
        this.y = y;
    }
    public Complex plus(Complex r) {
        return new Complex(x + r.x, y + r.y);
    }
    public String toString() {
        return "(" + x + "," + y + ")";
    }
    public static void main(String [] args) {
        Complex a = new Complex (5.5,9.2);
        Complex b = new Complex (2.3,-5.1);
        Complex c;
        c = a.plus(b);
        System.out.println("a = " + a);
        System.out.println("b = " + b);
        System.out.println("c = " + c);
    }
}