X11-Basic is a dialect of the BASIC programming language with graphics capability that integrates features like shell scripting, cgi-Programming and full graphical visualisation into the easy to learn basic language on modern computers.
The syntax is most similar to the old GFA-Basic ATARI ST implementation. Old GFA-programs should run with only few changes. Also DOS/QBASIC programmers will feel comfortable.
Ancient ANSI-Basic programs (with line numbers) can be converted to X11-Basic with the bas2x11basic program (see the man page bas2x11basic(1) ).
xbasic is the interpreter. It interpretes basic command-files (programs), which usually have the extension .bas or .xbas. It can also run in interactive mode in which case it interpretes single lines of code, which are entered. xbasic can also interpret and run bytecode files, which have been compiled before from .bas programs via the xbbc(1) bytecode compiler.
For detailed help and description of the implemented basic commands take a look at the README file which comes with the X11-Basic package. There is also a full users manual available as *.pdf file on the homepage.
A prompt will be displayed and any command can be typed in. It will be excecuted immediately after pressing return or enter. The input is buffered and can be edited using the up and down arrows on the keyboard.
To quit the program simply enter quit or press CTRL-C.
xbasic testme.bas xbasic testme.b xbasic -e 'alert 1,"Hello world !",1," OK ",b' xbasic --eval 1+3-4*3 xbasic --help "*nl*"
You can find many sample programs in /usr/share/doc/packages/X11Basic/examples.
#!/bin/xbasicin the first command line can be excecuted directly.
For a complete language reference of X11-Basic please refer to the manual. You should be able to find one at http://x11-basic.sourceforge.net/x11basic.html
If you find a bug in the X11-Basic interpreter, you should report it. But first, you should make sure that it really is a bug, and that it appears in the latest version of the X11-Basic package that you have.
Once you have determined that a bug actually exists, mail a bug report to firstname.lastname@example.org. If you have a fix, you are welcome to mail that as well! Suggestions may be mailed to the X11-Basic mailing list on www.sourceforge.net/projects/x11-basic or posted to the bug tracking system.
Comments and bug reports concerning this manual page should be directed to email@example.com.
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
tcsh(1), sh(1), xbc(1), xbbc(1), bas211basic(1)