CALL FUNCTION 'ROUND' EXPORTING decimals = 0 "取到小數點下第幾位 input = 數字型態變數 sign = 'X'
'X' = 四捨五入,
'+' = 無條件進位,
'-' = 無條件捨去 IMPORTING output = 數字型態變數
EXCEPTIONS input_invalid = 1 overflow = 2 type_invalid = 3 OTHERS = 4.