package beugro_komplex;

class Komplex {

    protected double re;
    protected double im;

    public Komplex(double re) {
        this(re, 0.0);

    }

    public Komplex(double re, double im) {
        this.re = re;
        this.im = im;
        System.out.println("Uj komplex szam: " + this);
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("(").append(re);
        if (im >= 0) {
            sb.append("+" + im + "i)");
        } else {
            sb.append("-" + (-im) + "i)");
        }
        return sb.toString();
    }

    public  Komplex plusz(Valos v) {
        System.out.println("K+V: " + this + " + " + v);
        return new Komplex(this.re + v.re, this.im);

    }
}

class Valos extends Komplex {

    public Valos(double re) {
        super(re);
        System.out.println("Uj valos szam: "+this);
    }

    public Komplex plusz(Komplex v) {
        System.out.println("V+K:" + toString() + v);
        if (v.im == 0) {
            return new Valos(this.re + v.re);
        } else {
            return new Komplex(this.re + v.re, v.im);
        }
    }
    @Override
    public Valos plusz(Valos v) {
        System.out.println("V+V: " + toString() + v);
        return
                new Valos(this.re + v.re);

    }

    @Override
    public String toString() {
        return "(" + re + ")";
    }

}

public class Beugro_komplex {

    public static void main(String[] args) {

        Komplex kk=new Komplex(3.4,-5.6);
        Komplex kv=new Valos(2.6);
        Valos vv= new Valos(1.4);

        System.out.println("//1//");
        System.out.println(((Valos)kv).plusz(kk));

        System.out.println("//2//");
        System.out.println(((Valos)kv).plusz((Valos)kv));

         System.out.println("//3//");
        System.out.println(((Valos)kv).plusz(kv));

         System.out.println("//4//");
       // System.out.println(kv.plusz((Valos)kk)); Futási/ClassCastException

         System.out.println("//5//");
        System.out.println(kv.plusz((Valos)kv));


          System.out.println("//6//");
       // System.out.println(kv.plusz(kv); // forditási hiba

           System.out.println("//7//");
        //System.out.println(kk.plusz((Valos)kk)); Futási/ClassCastException
    }

}