set serveroutput on

DECLARE
  c1 cerc;
  c2 cerc;
BEGIN
  dbms_output.enable;
  --folosire constructor implicit
  c1 := cerc(10,314.15926535897931);
  dbms_output.put_line(to_char(c1.arie,'9999.999'));
  -- folosire constructor explicit
  c2 := cerc(10);
  dbms_output.put_line(to_char(c2.arie,'9999.999'));
END;