Aufgabe 2

package Aufgaben;
public class Program{
    public static void main(String[] args) {
        Complex c1 = new Complex();
        Complex c2 = new Complex();
        c1.init(2, 2);
        c2.init(4, 3);
        c1.print(); // 2+2i
        c2.print(); // 4+3i

        c1.add(c2);
        c2.mul(c1);
        c2.print();
        c2.sub(c1);

        c1.print(); // 6+5i
        c2.print(); // 3+33i
        }
}

public class Complex{
  public int real;
  public int imaginary;

  public void init(int r, int i){
    this.real = r;
    this.imaginary = i;
  }

  public void print(){
    System.out.print(this.real + "+" + this.imaginary + "i \n");
   }

  public void add(Complex c){
    this.real += c.real;
    this.imaginary += c.imaginary;
  }

  public void mul(Complex c){
    int oldreal = this.real;
    this.real = this.real * c.real - this.imaginary * c.imaginary;
    this.imaginary = oldreal * c.imaginary + this.imaginary * c.real;
  }

  public void sub(Complex c){
    this.real -= c.real;
    this.imaginary =this.imaginary- c.imaginary;
  }
}