Opening different cursor under same name?

Question

I have a problem that depending on a if statement I want to open two different cursors. The cursors have the same format for their ROWTYPE. Like:
CURSOR a_cur IS SELECT a,b FROM c WHERE d=e;
CURSOR b_cur IS SELECT a,b, FROM c WHERE d<>e;
Then I want to run the same logic in the fetch loop no mater if I opened a_cur or b_cur. At the moment the logic is replicated in the code, but I would like to avoid this. Is it possible to open either one of them as a alias and then run the fetch loop on the alias. Some thing like this:
DECLARE
g_val a_cur%ROWTYPE;
BEGIN
IF f=1 THEN
OPEN a_cur as opened_cursor;
ELSE
OPEN b_cur as opened_cursor;
FOR g_val IN opened_cursor LOOP
<lots of logic>
END LOOP;

Answer 1

Here is an example of using a REF CURSOR:
create table t
(x int)
insert into t
select rownum
  from all_objects
where rownum <=10
declare
   rc sys_refcursor;
   rec t%rowtype;
   condition varchar2(1) := 'E';
begin
   if condition = 'E' -- Even Numbers only
   then
      open rc for select *
                    from t
                   where Mod (x, 2) = 0
   elsif condition = 'O' -- Odd Numbers
   then
      open rc for select *
                    from t
                   where Mod (x, 2) = 1
   end if;
   loop
      fetch rc into rec;
      exit when rc%notfound;
      Dbms_Output.Put_Line (rec.x);
   end loop;
end;