Terminal control/Ringing the terminal bell: Difference between revisions
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=={{header|C#}}== |
=={{header|C#}}== |
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Inside a function: |
Inside a function: |
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<lang |
<lang csharp>// the simple version: |
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System.Console.Write("\a"); // will beep |
System.Console.Write("\a"); // will beep |
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System.Threading.Thread.Sleep(1000); // will wait for 1 second |
System.Threading.Thread.Sleep(1000); // will wait for 1 second |
Revision as of 00:58, 10 September 2011
You are encouraged to solve this task according to the task description, using any language you may know.
Make the terminal running the program ring its "bell". On modern terminal emulators, this may be done by playing some other sound which might or might not be configurable, or by flashing the title bar or inverting the colors of the screen, but was classically a physical bell within the terminal. It is usually used to indicate a problem where a wrong character has been typed.
In most terminals, if the Bell character (ASCII code 7, \a
in C) is printed by the program, it will cause the terminal to ring its bell. This is a function of the terminal, and is independent of the programming language of the program, other than the ability to print a particular character to standard out.
Ada
<lang ada>with Ada.Text_IO; use Ada.Text_IO; with Ada.Characters.Latin_1;
procedure Bell is begin
Put(Ada.Characters.Latin_1.BEL);
end Bell;</lang>
AutoHotkey
<lang AutoHotkey> fileappend, `a, * </lang>
This requires that you compile the exe in console mode (see Lexikos script to change this) or pipe the file through more: autohotkey bell.ahk |more
AWK
<lang awk>BEGIN { print "\a" # Ring the bell }</lang>
BASIC
Applesoft BASIC
<lang Applesoft BASIC> 10 PRINT CHR$ (7);</lang>
Integer BASIC
You can't see it, but the bell character (Control G) is embedded in what looks like an empty string on line 10. <lang Integer BASIC> 10 PRINT "";: REM ^G IN QUOTES
20 END</lang>
Locomotive Basic
<lang locobasic>10 PRINT CHR$(7)</lang>
ZX Spectrum Basic
The ZX Spectrum had a speaker, rather than a bell. Here we use middle C as a bell tone, but we could produce a different note by changing the final zero to a different value.
<lang basic>BEEP 0.2,0</lang>
BBC BASIC
Assuming that the platform the program is running on rings the bell when CHR$7 is sent to the VDU driver:
<lang bbcbasic>VDU 7</lang>
Befunge
<lang befunge>7,@</lang>
Brainf***
Assuming the output stream is connected to a TTY, printing BEL should ring it's bell.
<lang brainfuck> I
+ + + +++
+-+-+
.</lang>
C
<lang c>#include <stdio.h> int main() {
printf("\a"); return 0;
}</lang>
C#
Inside a function: <lang csharp>// the simple version: System.Console.Write("\a"); // will beep System.Threading.Thread.Sleep(1000); // will wait for 1 second System.Console.Beep(); // will beep a second time System.Threading.Thread.Sleep(1000);
// System.Console.Beep() also accepts (int)hertz and (int)duration in milliseconds: System.Console.Beep(440, 2000); // default "concert pitch" for 2 seconds </lang>
Delphi
<lang Delphi>program TerminalBell;
{$APPTYPE CONSOLE}
begin
Writeln(#7);
end.</lang>
E
<lang e>print("\u0007")</lang>
Forth
<lang forth>7 emit</lang>
<lang forth>#bell emit</lang>
<lang forth>^G emit</lang>
Haskell
<lang haskell>main = putStr "\a"</lang>
Icon and Unicon
Works on both Icon and Unicon.
<lang Icon> procedure main ()
write ("\7") # ASCII 7 rings the bell under Bash
end </lang>
Java
<lang java>public class Bell{
public static void main(String[] args){ java.awt.Toolkit.getDefaultToolkit().beep();
//or
System.out.println((char)7); }
}</lang>
Logo
<lang logo>type char 7</lang>
Objeck
<lang objeck>7->As(Char)->PrintLine();</lang>
Perl
<lang perl>print "\a";</lang>
Perl 6
<lang perl6>print 7.chr;</lang>
PicoLisp
<lang PicoLisp>(beep)</lang>
PostScript
The following will only work in a PostScript interpreter that sends output to a terminal. It will very likely not make a printer beep. <lang postscript>(\007) print</lang>
PowerShell
One can either use the ASCII BEL
character which only works in a console (i.e. not in a graphical PowerShell host such as PowerShell ISE):
<lang powershell>"`a"</lang>
or use the .NET Console
class which works independent of the host application:
<lang powershell>[Console]::Beep()</lang>
PureBasic
<lang PureBasic>Print(#BEL$)</lang>
Python
<lang python>print "\a"</lang>
R
<lang R>alarm()</lang>
Retro
<lang Retro>7 putc</lang>
REXX
There is no standard REXX built-in function to handle the sounding of the bell or a PC's speaker. However, some REXX interpreters have added a non-stardard BIF. <lang rexx>call beep(freq [,duration]) /*supported (kinda) by Regina. */
call sound(freq [,duration ]) /*supported by PC/REXX. */
say '07'x /*works under the Windows DOS shell.*/
say copies('07'x,100) /*as above, but much more annoying. */</lang>
Ruby
<lang python>print "\a"</lang>
SNUSP
<lang snusp>$+++++++.#</lang>
Tcl
<lang tcl>puts -nonewline "\a";flush stdout</lang>
UNIX Shell
<lang sh>#!/bin/sh
- Ring the terminal bell
- echo "\a" # does not work in some shells
tput bel</lang>
- Programming Tasks
- Terminal control
- Ada
- AutoHotkey
- AWK
- BASIC
- Applesoft BASIC
- Integer BASIC
- Locomotive Basic
- ZX Spectrum Basic
- BBC BASIC
- Befunge
- Brainf***
- C
- C sharp
- Delphi
- E
- Forth
- Haskell
- Icon
- Unicon
- Java
- Logo
- Objeck
- Perl
- Perl 6
- PicoLisp
- PostScript
- PowerShell
- PureBasic
- Python
- R
- Retro
- REXX
- Ruby
- SNUSP
- Tcl
- UNIX Shell
- PARI/GP/Omit
- Inform 7/Omit