CLASS lcl_vehicle DEFINITION.
   PUBLIC SECTION.
     METHODS get_average_fuel
                     IMPORTING im_distance    TYPE s_distance
                                          im_fuel        TYPE s_capacity
       RETURNING value(re_fuel) TYPE s_consum.
ENDCLASS.

DATA : r_veh1 TYPE REF TO lcl_vehicle,
           r_veh2 TYPE REF TO lcl_vehicle,
         avg_fuel TYPE s_consum.
...
avg_fuel =
    r_veh1->get_average_fuel( im_distance = 500 im_fuel = '50.0')
 +  r_veh2->get_average_fuel( im_distance =600 im_fuel = '60.0')

위의 Functional Method구문관련해서..

CLASS에서 선언된 METHOD는 Instance Method이므로 PUBLIC이나 PRIVATE이나

둘다 쓰여도 상관없다고 합니다.

그리하여 Functional Method사용시에

avg_fuel =
    r_veh1->get_average_fuel( im_distance = 500 im_fuel = '50.0')
 +  r_veh2->get_average_fuel( im_distance =600 im_fuel = '60.0')

(result = ref -> func_method_name)

을 쓴다고 알고 있습니다..

 위구문의 전체적인 해석(ex) RETURNING이 왜 Functional Method에서 쓰이는지 등등)

관련해서 요청합니다....^^;;