abap 简单的屏幕输入条件CL_DEMO_INPUT及屏幕输出CL_DEMO_OUTPUT报表

DATA ID TYPE SCARR-CARRID.
CL_DEMO_INPUT=>REQUEST( CHANGING FIELD = ID ).

SELECT  CITYTO AS NAME, CARRID AS ID
       FROM   SPFLI
       WHERE  CARRID = @ID
       INTO TABLE @DATA(RESULT).

CL_DEMO_OUTPUT=>DISPLAY( RESULT ).