• !符号的含义


    以ZTEST29的flow logic为例,!符号代表区分系统变量名称和自定义的名称。

    F1中查看!可以看到示例:

    FORM test USING !CHANGING
              CHANGING !USING.
      using = changing.
    ENDFORM.

     

    附:ZTEST29

    *&---------------------------------------------------------------------*
    *& Report  ZTEST29
    *&
    *&---------------------------------------------------------------------*
    *&
    *&
    *&---------------------------------------------------------------------*
    REPORT ztest29.

    DATAgt_sbook TYPE TABLE OF sbook.
    DATAgs_sbook TYPE sbook.

    FIELD-SYMBOLS <fs> TYPE STANDARD TABLE.
    ASSIGN gt_sbook TO <fs>.

    SELECTION-SCREEN BEGIN OF BLOCK blk1.
    PARAMETERS p_test LIKE ekko-zywlx.
    SELECTION-SCREEN END OF BLOCK blk1.

    INITIALIZATION.
      MESSAGE 'INITIALIZATION' TYPE 'S'.

    AT SELECTION-SCREEN OUTPUT.
      MESSAGE 'AT SELECTION-SCREEN OUTPUT' TYPE 'S'.

    AT SELECTION-SCREEN.
      MESSAGE 'AT SELECTION-SCREEN' TYPE 'S'.

    START-OF-SELECTION.
      MESSAGE 'START-OF-SELECTION' TYPE 'S'.
      PERFORM action.

    AT SELECTION-SCREEN ON VALUE-REQUEST FOR p_test.
      MESSAGE 'AT SELECTION-SCREEN ON VALUE-REQUEST' TYPE 'S'.

    END-OF-SELECTION.
      MESSAGE 'END-OF-SELECTION' TYPE 'S'.

    FORM action.
      SELECT UP TO ROWS
      FROM sbook
      INTO TABLE gt_sbook.

      gs_sbook-carrid '001'.
      gs_sbook-passname 'test' && p_test.
      APPEND gs_sbook TO <fs>.

      LOOP AT <fs> INTO gs_sbook.
        WRITE:
          / gs_sbook-carrid,
          / gs_sbook-passname.
      ENDLOOP.

    ENDFORM.

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  • 原文地址:https://www.cnblogs.com/Intercalaryland/p/10793897.html
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