ABAP 数值四舍五入函数

DATA : dat  TYPE p DECIMALS  VALUE '12.5445' ,
       dat1 TYPE p DECIMALS  .

DATA   dat2 TYPE p DECIMALS  VALUE '12.540'.

* 方法一
CALL FUNCTION 'HR_NZ_ROUNDING_DECIMALS'
  EXPORTING
    value_in                 = dat
    conv_dec                 =       " 设置保留几位小数
  IMPORTING
    value_out                = dat1
  EXCEPTIONS
    no_rounding_required     =
    decimals_greater_than_10 =
    rounding_error           =
    OTHERS                   = .

* 方法二
CALL FUNCTION 'ROUND'
  EXPORTING
    decimals      =        " 保留多少位小数
    input         = dat2
    sign          = '+'     " + 向上取舍 - 向下取舍 （负数也一样）
  IMPORTING
    output        = dat1    " 输出返回结果
  EXCEPTIONS
    input_invalid =
    overflow      =
    type_invalid  =
    OTHERS        = .