inheritance

[Former Member]

hi,

what is inheritancec, give an example of single level inheritance

[Former Member]

Hi,

Inheritence is nothing but Extracting features of base class in to derived class wihtout writing the code again..

Main purpose of this one is REUSABILITY of the code, once u write the code u can use any number of times..

REPORT .

CLASS counter DEFINITION.

PUBLIC SECTION.

METHODS: set IMPORTING value(set_value) TYPE i,

increment,

get EXPORTING value(get_value) TYPE i.

PROTECTED SECTION.

DATA count TYPE i.

ENDCLASS.

CLASS counter IMPLEMENTATION.

METHOD set.

count = set_value.

ENDMETHOD.

METHOD increment.

ADD 1 TO count.

ENDMETHOD.

METHOD get.

get_value = count.

ENDMETHOD.

ENDCLASS.

CLASS counter_ten DEFINITION INHERITING FROM counter.

PUBLIC SECTION.

METHODS increment REDEFINITION.

DATA count_ten(1) TYPE c.

ENDCLASS.

CLASS counter_ten IMPLEMENTATION.

METHOD increment.

DATA modulo TYPE i.

CALL METHOD super->increment.

WRITE / count.

modulo = count MOD 10.

IF modulo = 0.

count_ten = count_ten + 1.

WRITE count_ten.

ENDIF.

ENDMETHOD.

ENDCLASS.

DATA: count TYPE REF TO counter,

number TYPE i VALUE 5.

START-OF-SELECTION.

CREATE OBJECT count TYPE counter_ten.

CALL METHOD count->set EXPORTING set_value = number.

DO 20 TIMES.

CALL METHOD count->increment.

ENDDO.

Thanks and Regards,

Surya

[Former Member]

inheritence means one object gets the properties of another onject.