sub routines

[Former Member]

hi ...

can any one help me in understanding subroutines using all ( tables, raising, using , changing ) parameters in both call by refrence and call by value method... with sample code....

thank u

Ginni

[Former Member]

hi ...

can any one help me in understanding subroutines using all ( tables, raising, using , changing ) parameters in both call by refrence and call by value method... with sample code....

thank u

Ginni

[Former Member]

Hi,

To help you understand better, just check this simple subroutine which uses using and changing parameters.

REPORT z_aris_test_12.

DATA: gv_export1(20) TYPE c VALUE 'Apple',

gv_export2(20) TYPE c VALUE 'Banana',

gv_flag TYPE flag VALUE 'X'.

START-OF-SELECTION.

PERFORM check_values USING gv_export1 gv_export2

CHANGING gv_flag.

&----

---

*& Form check_values

&----

---

• text

----

---

• -->%IMPORT1 text

• -->%IMPORT2 text

• -->%FLAG text

----

---

FORM check_values USING %import1 %import2

CHANGING %flag.

IF %import1 <> 'Apple'.

MOVE space TO %flag.

ENDIF.

IF %import2 <> 'Banana'.

MOVE space TO %flag.

ENDIF.

ENDFORM. "check_values

END-OF-SELECTION.

IF gv_flag = 'X'.

WRITE: 'Success!'.

ELSE.

WRITE: 'Fail!'.

ENDIF.

Hope it helps...

P.S. Please award points if it helps...

[Former Member]

Hi

Subroutines are mainly used for reusability of code.

PERFORM <name> USING < fields>

Tables it_VBAK

Changing v_kunnr.

form <name> USING < fields>

Tables t_VBAK type VBAK

Changing p_kunnr.

......code...

endform...

Fields are passed by Value and Internal Tables are always passed by reference.

Three ways of calling subroutines:

call by value ..

call by reference

call by value and reference.

See the SAP documentation.

Reward points if useful

Regards

Anji