function error declaration in vhdl

yes that really helped thank you .. actually i used these libraries because i needed them .. the declaration of the function was a small part of my project .. and it kept telling me that there was a problem in the declaration .. but now it doesn't ..

so thanks alot :)

package Average is

function avg (value1,value2 : std_logic_vector) return std_logic_vector ;

end;

package body Average is

function avg (value1,value2 : std_logic_vector) return std_logic_vector is

variable result : std_logic_vector (31 downto 0);

variable res: integer;

begin

res:= (CONV_INTEGER(value1)+CONV_INTEGER(value2))/2;

result:=CONV_STD_LOGIC_VECTOR(res,32);

return result;

end package body ;