哪里错啦呢

declare  cursor cemp is select ename,sal from emp;  pname emp.ename%type;  psal emp.sal%type;  begin    open cemp;    while cemp%found loop      fetch cemp into pname,psal;      dbms_output.put_line(pname||'的薪水是'||psal);      end loop;     close cemp;      end; 哪里错啦？