oracle, stored procedure, cursor

CREATE OR REPLACE PROCEDURE kevin_proc(x varchar) ISa VARCHAR(20);b VARCHAR(20);CURSOR mycur(rn NUMBER) IS SELECT * FROM t_kevin_test WHERE ROWNUM<rn;BEGINOPEN mycur(10);LOOP FETCH mycur INTO a,b;EXIT WHEN mycur%NOTFOUND;Dbms_Output.put_line('a: '||a);Dbms_Output.put_line('b: '||b);END LOOP;CLOSE mycur;begin dbms_output.put_line (x);end;END;