如何解决ALV的负数符号前显的问题

1、建立自定义函数
1.1 整数显示
FUNCTION CONVERSION_EXIT_Z0002_OUTPUT.
*"----------------------------------------------------------------------
*"*"Local interface:
*"  IMPORTING
*"     REFERENCE(INPUT)
*"  EXPORTING
*"     REFERENCE(OUTPUT)
*"----------------------------------------------------------------------
  DATA: OUTPUT1(12)   TYPE C,
        OUTDATUM   TYPE INT4.
  IF INPUT <> SPACE.
    OUTDATUM = INPUT.
    if input > 0.
      move OUTDATUM TO OUTPUT .
    else.
      OUTDATUM = OUTDATUM * ( -1 ).
      move OUTDATUM TO OUTPUT1 .
      CONCATENATE '-' output1 into output.
      CONDENSE output NO-GAPS .
  &n