I want to write a clock program that will show the time on the screen, but the time should change without any user's...
input (such as pressing ENTER key). I wrote one program, but that changes time only when I press ENTER or any function key. The program flow stops at EXFMT statement. I tried to use WRITE statement in a loop instead of EXFMT, but then the screen gets locked without changing the time.
You need to use a combination of WRITE [the record format] and READ [the file] instead of EXFMT. On top of this, you also need to create (or change or possibly override) your display file with WAITRCD (the number of seconds allowed to press a key). The RPG program should declare as keyword for the display file:
F a_file cf e workstn maxdev(*file)
Please note, you will get a I/O error on the read if the user does not press a key in the time allotted, so you need to have a I/O indicator on the read (or use the (E) extension). Good idea to do the same on the write.
Example follows: C write (e) a_format C read (e) a_file
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