public abstract class figur_c
{
  public figur_c(
    int x,
    int y )
  {
    this.x_center = x;
    this.y_center = y;
  } // figur_c

  public abstract int max_x();
  public abstract int max_y();
  public abstract int area();
  public abstract int omkrets();

  protected int x_center, y_center;
} // class figur_c