如何在PL/SQL块中打印游标？

DECLARE
  CURSOR c_emp IS
    SELECT employee_id, first_name, last_name
    FROM employees;
  v_emp_id employees.employee_id%TYPE;
  v_first_name employees.first_name%TYPE;
  v_last_name employees.last_name%TYPE;
BEGIN
  OPEN c_emp;
  LOOP
    FETCH c_emp INTO v_emp_id, v_first_name, v_last_name;
    EXIT WHEN c_emp%NOTFOUND;
    DBMS_OUTPUT.PUT_LINE('Employee ID: ' || v_emp_id);
    DBMS_OUTPUT.PUT_LINE('First Name: ' || v_first_name);
    DBMS_OUTPUT.PUT_LINE('Last Name: ' || v_last_name);
    DBMS_OUTPUT.PUT_LINE('----------------------');
  END LOOP;
  CLOSE c_emp;
END;
/

SET SERVEROUTPUT ON;