topic Re: Why no defining variable? in Application Development and Automation Discussions

Why no defining variable?

Former Member — Wed, 28 Nov 2007 08:50:26 GMT

Hi abapers,

In next code of example:

1) Why no defining var variable?

2) Is not necesary?

2) What contain var variable ( is a type c ?)

thanks for your attention.

***********************************************

Class Definition

----

CLASS main DEFINITION

----

CLASS main DEFINITION.

PUBLIC SECTION.

METHODS add_data IMPORTING i_data TYPE i.

METHODS get_data EXPORTING e_data TYPE char20.

PRIVATE SECTION.

DATA atribute TYPE char01.

ENDCLASS.

Class Implementation

----

CLASS main IMPLEMENTATION

----

CLASS main IMPLEMENTATION.

METHOD add_data.

ADD i_data TO atribute.

ENDMETHOD.

METHOD get_data.

CONCATENATE 'Atribute value' atribute

INTO r_data SEPARATED BY space.

ENDMETHOD.

ENDCLASS.

Creation Object

DATA: object_reference TYPE REF TO main.

Instance Creation

CREATE OBJECT object_reference.

Calling Methods

CALL METHOD object_reference->add_data( i_data = 3 ).

var = object_reference->get_data( ).

WRITE var.

The atribute value is printed

" Atribute value 3 "

********************************************************

Cordial greetings

Re: Why no defining variable?

matt — Wed, 28 Nov 2007 09:40:35 GMT

What you have here is pseudocode that looks like ABAP. It isn't ABAP, more a hint to how your program should look.

I've corrected the wiki with syntactically correct code, and definition of VAr.

m@t

Added reference to wiki

Message was edited by:

Matthew Billingham

Re: Why no defining variable?

Former Member — Wed, 28 Nov 2007 09:55:30 GMT

Hi here you have to declare VAR. Otherwise it should be a global variable. Otherwise the program dont work.

Here is the code..

*Class Definition

----

CLASS main DEFINITION

----

CLASS main DEFINITION.

PUBLIC SECTION.

METHODS add_data IMPORTING i_data TYPE i.

METHODS get_data returning value(e_data) TYPE char20.

PRIVATE SECTION.

DATA atribute TYPE char01.

ENDCLASS.

*Class Implementation

----

CLASS main IMPLEMENTATION

----

CLASS main IMPLEMENTATION.

METHOD add_data.

ADD i_data TO atribute.

ENDMETHOD.

METHOD get_data.

CONCATENATE 'Atribute value' atribute

INTO e_data SEPARATED BY space.

ENDMETHOD.

ENDCLASS.

*Creation Object

DATA: var type char20.

DATA: object_reference TYPE REF TO main.

start-of-selection.

*Instance Creation

CREATE OBJECT object_reference.

*Calling Methods

CALL METHOD object_reference->add_data( i_data = 3 ).

var = object_reference->get_data( ).

WRITE var.

Re: Why no defining variable?

marcelo_ramos1 — Wed, 28 Nov 2007 14:45:34 GMT

Hi Lopes,

I created this program and i forgot to copy and past the variable definition. But i have just fixed this problem on Wiki page <a href="https://wiki.sdn.sap.com/wiki/display/Snippets/ABAPObjects-CreatingyourFirstLocalClass-DefiningComponents">ABAP Objects - Creating your First Local Class - Defining Components</a>.

You and ALL ABAPers can correct any problem with my examples and/or comments on wiki page <a href="https://wiki.sdn.sap.com/wiki/display/ABAP/ABAP+Objects">ABAP Objects</a>.

My intention is to encourage all ABAP developers to use more the concept of the Abject oriented in ABAP Guidance, and wiki is the best tool in SDN to do it because anyone can contribute.

You can also comment on comment tab in wiki page.

Best Regards and thank you all for helping us with your comments.

Marcelo Ramos