Is there a BAPI function module which reverses the sign of an integer

Question

Hi Friends,
                 Could u plz tell me  a BAPI function module which can reverse the
sign of an integer ?
For example:       
if i get the integer value in work area as <number> <sign> , i need to change it to <sign><number>. 
i.e if i get the integer value in work area as    "248-" ("-" indicates minus sign) to " -248 ".
i.e if i get the sign after the value , my requirement is to get the sign before the value.
The actual ABAP query is:
data: QTY_1 TYPE CHAR10,
        QTY_2  TYPE CHAR10,
        WA_DISTK_PORTLET-QUANTITY TYPE INT4.
QTY_1 = WA_DISTK_PORTLET-QUANTITY.
                SEARCH QTY_1 FOR '-'.
        IF SY-SUBRC = 0 AND SY-FDPOS <> 0.
          SPLIT  QTY_1 AT '-' INTO  QTY_1 QTY_2.
          CONDENSE  QTY_1.
          CONCATENATE '-'  QTY_1  INTO QTY_1.
          CONDENSE  QTY_1.
        ELSE.
          CONDENSE  QTY_1.
        ENDIF.
        CLEAR: WA_DISTK_PORTLET-QUANTITY.
     MOVE : QTY_1 TO  WA_DISTK_PORTLET-QUANTITY.
when i move this QTY_1 to work area  quantity field The sign is coming after the numeric value.
Note: There is no possibility to change the datatype of quantity field.
I have tried my level best with 'CLOI_PUT_SIGN_IN_FRONT' function module.
I will assign full points to the correct function module.

Answer 1

Hi Ram,
try this ang look into fields.
data: fields type table of SVAL with header line.
fields-tabname = 'MARA'. fields-fieldname = 'MATNR'. append fields.
fields-tabname = 'BKPF'. fields-fieldname = 'BUDAT'. append fields.
CALL FUNCTION 'POPUP_GET_VALUES'
  EXPORTING
    POPUP_TITLE           = 'Value Insert'
  TABLES
    FIELDS                = fields.
Regards, Dieter