Error on Constructor

[Former Member]

Why I'have the similar error with this code ?

START-OF-SELECTION.

*-------------Definizione Classe veicolo <-------------------

CLASS veicolo DEFINITION.

    PUBLIC SECTION.

     METHODS constructor IMPORTING w_marca   TYPE STRING

                                  w_modello TYPE STRING.

    PRIVATE SECTION.

      DATA: marca TYPE string,

            modello TYPE string.

ENDCLASS.

*--> Implementazione Marca

CLASS veicolo IMPLEMENTATION.

  METHOD constructor.

    marca = w_marca.

    modello = w_modello.

  ENDMETHOD.

ENDCLASS.

*--> Definizione riferimento ad oggetto

DATA ref_veicolo TYPE REF TO veicolo.

CREATE OBJECT ref_veicolo EXPORTING w_marca = 'FIAT'

                                    w_modello = 'MUltipla'.

ENDSELECTION.

thank

[SimoneMilesi]

You should put the definition BEFORE the event START-OF-SELECTION

 
 CLASS veicolo DEFINITION.
 
   PUBLIC SECTION.
 
     METHODS constructor IMPORTING w_marca   TYPE string
 
                                  w_modello TYPE string.

 
   PRIVATE SECTION.
 
     DATA: marca TYPE string,
 
           modello TYPE string.

 ENDCLASS.                    "veicolo DEFINITION
 
 
 *--> Implementazione Marca
 
 CLASS veicolo IMPLEMENTATION.
 
 
   METHOD constructor.
 
 
     marca = w_marca.
 
     modello = w_modello.

   ENDMETHOD.                    "constructor
 

 ENDCLASS.                    "veicolo IMPLEMENTATION
 
 
 
 START-OF-SELECTION.
 
 

 *--> Definizione riferimento ad oggetto
 
 DATA ref_veicolo TYPE REF TO veicolo.
 data: lv_marca TYPE string VALUE 'FIAT',
       lv_modello TYPE string VALUE 'UNO'.
 
 CREATE OBJECT ref_veicolo  EXPORTING w_marca = lv_marca
                                      w_modello = lv_modello .