第一種:
PERFORM change_qty USING l_srqty
CHANGING it_inv-srqty.
FORM change_qty USING p_qty
CHANGING p_qty1.
p_qty1 = p_qty.
SHIFT p_qty1 LEFT DELETING LEADING ' '.
SHIFT p_qty1 UP TO '-' LEFT CIRCULAR.
CONDENSE p_qty1 NO-GAPS.
ENDFORM. " change_qty
第二種:
目的：将字符串尾的负号放在字符串首
CALL FUNCTION 'CLOI_PUT_SIGN_IN_FRONT'
CHANGING
value = itab-amunt.