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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><!-- Copyright 1997 The Open Group, All Rights Reserved --><title>flash</title></head><body bgcolor=white><center><font size=2>The Single UNIX ® Specification, Version 2<br>Copyright © 1997 The Open Group</font></center><hr size=2 noshade><h4><a name = "tag_000_000_381"> </a>NAME</h4><blockquote>flash - flash the screen</blockquote><h4><a name = "tag_000_000_382"> </a>SYNOPSIS</h4><blockquote><pre><code>#include <<a href="curses.h.html">curses.h</a>>int flash(void);</code></pre></blockquote><h4><a name = "tag_000_000_383"> </a>DESCRIPTION</h4><blockquote>The<i>flash()</i>function alerts the user. It flashes the screen, or if that is not possible,it sounds the audible alarm on the terminal.If neither signal is possible, nothing happens.</blockquote><h4><a name = "tag_000_000_384"> </a>RETURN VALUE</h4><blockquote>The<i>flash()</i>function always returns OK.</blockquote><h4><a name = "tag_000_000_385"> </a>ERRORS</h4><blockquote>No errors are defined.</blockquote><h4><a name = "tag_000_000_386"> </a>APPLICATION USAGE</h4><blockquote>Nearly all terminals have an audible alarm, but only some can flash thescreen.</blockquote><h4><a name = "tag_000_000_387"> </a>SEE ALSO</h4><blockquote><i><a href="beep.html">beep()</a></i>,<i><a href="curses.h.html"><curses.h></a></i>.</blockquote><hr size=2 noshade><center><font size=2>UNIX ® is a registered Trademark of The Open Group.<br>Copyright © 1997 The Open Group<br> [ <a href="../index.html">Main Index</a> | <a href="../xshix.html">XSH</a> | <a href="../xcuix.html">XCU</a> | <a href="../xbdix.html">XBD</a> | <a href="../cursesix.html">XCURSES</a> | <a href="../xnsix.html">XNS</a> ]</font></center><hr size=2 noshade></body></html>⌨️ 快捷键说明
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