使用宏定义DEFINE

最新推荐文章于 2022-08-26 16:43:45 发布

原创最新推荐文章于 2022-08-26 16:43:45 发布 · 346 阅读

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语法
DEFINE <macro>.
<statements>
END-OF-DEFINITION.

DATA: RESULT TYPE I,
      N1     TYPE I VALUE 5,
      N2     TYPE I VALUE 6.

DEFINE OPERATION.
   RESULT = &1 &2 &3.
   OUTPUT   &1 &2 &3 RESULT.
END-OF-DEFINITION.

DEFINE OUTPUT.
WRITE: / 'The result of &1 &2 &3 is', &4.
END-OF-DEFINITION.

OPERATION 4 + 3 .
OPERATION 2 ** 7.
OPERATION N2 - N1.

输出如下：
The result of 4 + 3 is          7
The result of 2 ** 7 is        128
The result of N2 - N1 is          1

用于ALV中：
DEFINE ADD_FIELDCAT.
    LWA_FIELDCAT-FIELDNAME     = &1.                "变量名
    LWA_FIELDCAT-SELTEXT_M     = &2.                "描述
    LWA_FIELDCAT-OUTPUTLEN     = &3.                "显示长度
    LWA_FIELDCAT-DATATYPE      = &4.                "类型

LWA_FIELDCAT-DDICTXT = 'M'.

    APPEND LWA_FIELDCAT TO O_FIELDCAT.
    CLEAR LWA_FIELDCAT.
END-OF-DEFINITION.

ADD_FIELDCAT:
        'HKONT'   '科目'     '12' 'CHAR',
        'TXT50'   '名称'     '50' 'CHAR',
        'WRBTR'   '外币金额' '16' 'CURR',
        'PSWSL'   '货币'     '5' 'CHAR',
        'DMBTR'   '本币金额' '16' 'CURR'.