公众号：SAP Technical
本文作者：matinal
前言部分
我们知道，在SAP里的程序结构包含了很多内容，比如：Global Declarations里包含interface，classes，global data；Method里包含local data，implementation等等，同时本文也列举一个subscreen的例子，仅供参考。
程序结构
看看在SAP ABAP 7.50里程序结构发生变化了吗？
SubScreen举例
举一个SubScreen的例子，来看一下
REPORT zmatinal_subscreen. SELECTION-SCREEN BEGIN OF SCREEN 1100 AS SUBSCREEN NESTING LEVEL 4.
SELECTION-SCREEN BEGIN OF BLOCK b1 WITH FRAME TITLE text-010.
PARAMETERS: p1(10) TYPE c,
p2(10) TYPE c,
p3(10) TYPE c.
SELECTION-SCREEN END OF BLOCK b1.
SELECTION-SCREEN END OF SCREEN 1100. SELECTION-SCREEN BEGIN OF SCREEN 1200 AS SUBSCREEN NESTING LEVEL 4.
SELECTION-SCREEN BEGIN OF BLOCK b2 WITH FRAME TITLE text-020.
PARAMETERS: q1(10) TYPE c OBLIGATORY,
q2(10) TYPE c OBLIGATORY,
q3(10) TYPE c OBLIGATORY.
SELECTION-SCREEN END OF BLOCK b2.
SELECTION-SCREEN END OF SCREEN 1200. DATA: ok_code TYPE sy-ucomm,
save_ok TYPE sy-ucomm. DATA: number(4) TYPE n VALUE '1100'. START-OF-SELECTION.
CALL SCREEN 100. MODULE status_0100 OUTPUT.
SET PF-STATUS 'SCREEN_100'.
ENDMODULE. MODULE cancel INPUT.
LEAVE PROGRAM.
ENDMODULE. MODULE user_command_0100 INPUT.
save_ok = ok_code.
CLEAR ok_code.
CASE save_ok.
WHEN 'BUTTON1'.
number = 1100.
WHEN 'BUTTON2'.
number = 1200.
ENDCASE.
ENDMODULE. AT SELECTION-SCREEN.
MESSAGE s888(sabapdemos) WITH text-030 sy-dynnr.
本文是SAP ABAP7.50系列的第三篇。