SYSTEM: Difference between revisions
Jump to navigation
Jump to search
Navigation:
Main Page with Articles and Tutorials
Keyword Reference - Alphabetical
Keyword Reference - By usage
Report a broken link
TheSnowDog (talk | contribs) m (QBasic/QuickBASIC capitialisation) |
No edit summary |
||
| (4 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
The | The [[SYSTEM]] statement immediately closes a program and returns control to the operating system. | ||
| Line 6: | Line 6: | ||
{{ | {{PageParameters}} | ||
* QB64 allows a ''code'' number to be used after SYSTEM to be read in another program module by the [[SHELL]] or [[_SHELLHIDE]] functions. | * QB64 allows a ''code'' number to be used after SYSTEM to be read in another program module by the [[SHELL]] or [[_SHELLHIDE]] functions. | ||
| Line 20: | Line 20: | ||
* '''QBasic BAS files can be run like compiled programs without returning to the IDE when [[SYSTEM]] is used to [[END|end]] them!''' | * '''QBasic BAS files can be run like compiled programs without returning to the IDE when [[SYSTEM]] is used to [[END|end]] them!''' | ||
* If a program BAS module is run from the IDE, stopped by Ctrl-Break or an error occurs the QB program will exit to the IDE. | * If a program BAS module is run from the IDE, stopped by Ctrl-Break or an error occurs the QB program will exit to the IDE. | ||
* To run a QuickBASIC program without the IDE use the following DOS command line: {{ | * To run a QuickBASIC program without the IDE use the following DOS command line: {{Text|QB.EXE /L /RUN filename.BAS|green}} | ||
{{PageSeeAlso}} | {{PageSeeAlso}} | ||
* [[SHELL (function)]] | * [[SHELL (function)]] | ||
* [[_SHELLHIDE]] | * [[_SHELLHIDE]] | ||
* [[_EXIT (function)]], [[END]] | * [[_EXIT (function)]], [[END]] | ||
{{PageNavigation}} | {{PageNavigation}} | ||
Latest revision as of 22:52, 11 February 2023
The SYSTEM statement immediately closes a program and returns control to the operating system.
Syntax
- SYSTEM [return_code%]
Parameters
- QB64 allows a code number to be used after SYSTEM to be read in another program module by the SHELL or _SHELLHIDE functions.
Usage:
- This command should be used to close a program quickly instead of pausing with END or nothing at all.
- A code can be added after the statement to send a value to the SHELL (function) or _SHELLHIDE function in another module.
- SYSTEM ends the program and closes the window immediately. The last screen image may not be displayed.
QBasic or QuickBASIC:
- QBasic BAS files can be run like compiled programs without returning to the IDE when SYSTEM is used to end them!
- If a program BAS module is run from the IDE, stopped by Ctrl-Break or an error occurs the QB program will exit to the IDE.
- To run a QuickBASIC program without the IDE use the following DOS command line: QB.EXE /L /RUN filename.BAS
See also