DCLF RCVF SNDF SNDRCVF等用法

１
　　DCLF FILE(library-name/file-name)
　　　　RCDFMT(record-format-names)
２．用显示文件接收和发送数据
　　SNDF，与记录格式中输出和输入/输出字段相关的变量的内容有系统格式化后发送到显示设备
RCVF 记录格式中输入和输入/输出字段的值放在相应的CL变量中
SNDRCVF把CL变量中的内容送往显示，然后从显示中得到更新后的字段
this:
Operator Menu
1. Accounts Payable
2. Accounts Receivable
90. Signoff
Option:
First, enter the following DDS source. The record format is MENU, and OPTION is
an input-capable field. The OPTION field uses DSPATR(MDT). This causes the
system to check this field for valid values even if the operator does not enter
anything.
Enter the CRTDSPF command to create the display file. In CL programming, the
display file name (INTMENU) can be the same as the record format name (MENU),
though this is not true for some other languages, like RPG for OS/400.
The display file could also be created using the Screen Design Aid (SDA) utility.
Next, enter the CL source to run the menu.
The CL source for this menu is:
PGM /* OPERATOR MENU */
DCLF INTMENU
BEGIN: SNDRCVF RCDFMT(MENU)
IF COND(&OPTION *EQ 1) THEN(CALL ACTSPAYMNU)
IF COND(&OPTION *EQ 2) THEN(CALL ACTSRCVMNU)
IF COND(&OPTION *EQ 90) THEN(SIGNOFF)
GOTO BEGIN
ENDPGM