The beep and flash routines activate the audio-visual alarm.
Syntax | 
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   #include <curses.h>
   int beep();
   int flash();
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Return Values | 
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- OK
 Successful completion.
- ERR
 An error occurred.  The terminal does not support
either capability.
Description | 
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The beep() and flash() routines produce an audio and visual alarm on the terminal, respectively.  If the terminal has the capability, beep() sounds a bell or beep, and flash() flashes the creen.  One alarm is substituted for another if the terminal does not support the capability called. For  example, a call to
beep() for a terminal without that capability results
in a flash and vice versa.
Implementation Considerations | 
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Identical to XPG/3
Portability | 
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HP-UX, UNIX System V, XPG/3