QBasic Information Center Tutorials - Date/Time
These tutorials were written to help you get a quick, but thorough, understanding of QBasic -
the scope of the language as well as it's specific capabilities.
Date/Time Functions Summary
QBasic has relatively few date/time related functions. They can
be categorized as follows:
|
| date$, time$
|
|
| timer, sleep, wait
|
Date/Time Function Reference
Here's a quick reference of the available date/time functions, in alphabetical
order.
- date$ - sets or returns the date on a computer
result$ = date$ # returns "08-12-2008" (today's date)
date$ = "08-12-2008" # sets computer time to 08-12-2000
- sleep - suspends program execution
sleep 10 # 10 second suspension
Note: If seconds is 0 or omitted, program is suspended until any
key is pressed or until a trapped event occurs.
- time$ - sets or returns the time on a computer
result$ = time$ # returns "16:54:18" (24-hour format)
time$ = "16:54:18" # sets computer time to 08-12-2000
- timer - returns seconds since midnight OR
creates event at specific elapsed time
result = timer # returns a number, such as 60959.05
timer ON # enables timer event trapping
timer OFF # disables timer event trapping
timer STOP # suspends timer event trapping.
event processing occurs once
timer ON is used again.
On timer(n%) GoSub Line
# n% is seconds before On Timer branches
# n% has 24-hour maximum (86,400 seconds)
- wait - suspends program execution until bit pattern received from input port
wait port%, AND-expression%, XOR-expression
# port% is number of input port
# AND-expression% is bit pattern to watch for
# XOR-expression% optionally turns bits on
before AND operation
If you have any suggestions for additions to these tutorials, please let me know.
|
