Constructors in Inheritance.

[Former Member]

Hi,

REPORT  Z_INHERITANCE_CONSTRUCTOR.
CLASS demo DEFINITION.
  PUBLIC SECTION.
  CLASS-METHODS main.
  ENDCLASS.
CLASS vessel DEFINITION.
  PUBLIC SECTION.
  METHODS : constructor IMPORTING i1 TYPE string
                                                            i2  TYPE string,
                     show_output.
  PROTECTED SECTION.
  DATA name TYPE string.
  DATA sex TYPE string.
  ENDCLASS.
CLASS ship DEFINITION INHERITING FROM vessel.
  ENDCLASS.
CLASS motorship DEFINITION INHERITING FROM ship.
  PUBLIC SECTION.
  METHODS : constructor IMPORTING i_name TYPE string
                                                            i_fuel_amount TYPE i.
  PRIVATE SECTION.
  DATA fuel_amount TYPE i.
  ENDCLASS.

CLASS vessel IMPLEMENTATION.
  METHOD constructor .
    name = i1.
    sex =  i2.
  ENDMETHOD. "constructor
  METHOD show_output . 
     DATA : name TYPE string,
                 sex TYPE string,
                 output type string.
                name = me->name.
                sex = me->sex.
     CONCATENATE 'The Name is : ' name '& The sex is :' sex  into output.
     MESSAGE output TYPE 'I'.
  ENDMETHOD. "show_output
  ENDCLASS.
CLASS motorship IMPLEMENTATION.
  METHOD constructor .
  super->constructor( i1 = 'Abhinab' i2 = 'M' ).
  fuel_amount = i_fuel_amount.
  ENDMETHOD. "constructor
  ENDCLASS.
CLASS demo IMPLEMENTATION.
  METHOD main .
 DATA : o_vessel TYPE REF TO vessel,
        o_ship TYPE REF TO ship,
        o_motorship TYPE REF TO motorship.
 CREATE OBJECT : o_vessel EXPORTING i1 = 'Vivien'
                                                                    i2 = 'M',
                                o_ship EXPORTING i1 = 'Sia'
                                                                i2 = 'F',
                                o_motorship EXPORTING i_fuel_amount = '1200'
                                                                          i_name = 'Eules'.
  ENDMETHOD. "main
  ENDCLASS.

  START-OF-SELECTION.
  demo=>main( ).

In my code the method show_output doesn't get implemented,but when i place the same code of show_output in the constructor method the code is getting executed.

I am not able to figure out the reason behind this.

can anybody please help me understand why is this happening??

Regards,

Abhinab Mishra

[Former Member]

The show_output method was never been called.

o_vessel->show_output is required in the main method of demo.

Silly Mistake.

Regards,

Abhinab Mishra