CLASS lcl_sum DEFINITION.
  PUBLIC SECTION.
    METHODS: SUM IMPORTING iv_1 TYPE i
                 RETURNING VALUE(rv_sum) TYPE i.
ENDCLASS.                    "lcl_sum DEFINITION
*
START-OF-SELECTION.
* Nothing here yet
*
*
CLASS lcl_sum IMPLEMENTATION.
  METHOD SUM.
    rv_sum = iv_1 * iv_1.
  ENDMETHOD.                    "sum
ENDCLASS.                    "lcl_sum IMPLEMENTATION