<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"
lang="en" dir="ltr">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>
find_first_not_of [C++ Reference]
</title>
<meta name="generator" content="DokuWiki Release 2009-12-25c "Lemming"" />
<meta name="robots" content="index,follow" />
<meta name="date" content="2010-04-16T09:48:00-0700" />
<meta name="keywords" content="string,find_first_not_of" />
<link rel="search" type="application/opensearchdescription+xml" href="/wiki/lib/exe/opensearch.php" title="C++ Reference" />
<link rel="start" href="/wiki/" />
<link rel="contents" href="/wiki/string/find_first_not_of?do=index" title="Index" />
<link rel="alternate" type="application/rss+xml" title="Recent Changes" href="/wiki/feed.php" />
<link rel="alternate" type="application/rss+xml" title="Current Namespace" href="/wiki/feed.php?mode=list&ns=string" />
<link rel="edit" title="Edit this page" href="/wiki/string/find_first_not_of?do=edit" />
<link rel="alternate" type="text/html" title="Plain HTML" href="/wiki/_export/xhtml/string/find_first_not_of" />
<link rel="alternate" type="text/plain" title="Wiki Markup" href="/wiki/_export/raw/string/find_first_not_of" />
<link rel="canonical" href="http://www.cppreference.com/wiki/string/find_first_not_of" />
<link rel="stylesheet" media="all" type="text/css" href="/wiki/lib/exe/css.php?s=all&t=custom1&tseed=1272971091" />
<link rel="stylesheet" media="screen" type="text/css" href="/wiki/lib/exe/css.php?t=custom1&tseed=1272971091" />
<link rel="stylesheet" media="print" type="text/css" href="/wiki/lib/exe/css.php?s=print&t=custom1&tseed=1272971091" />
<script type="text/javascript" charset="utf-8" ><!--//--><![CDATA[//><!--
var NS='string';var JSINFO = {"id":"string:find_first_not_of","namespace":"string"};
//--><!]]></script>
<script type="text/javascript" charset="utf-8" src="/wiki/lib/exe/js.php?tseed=1272971091" ></script>
<link rel="shortcut icon" href="/wiki/lib/tpl/custom1/images/favicon.png" />
</head>
<body>
<div class="dokuwiki">
<div class="stylehead">
<div class="header">
<div class="pagename">
[[<a href="../string/find_first_not_of.html" title="Backlinks">find_first_not_of</a>]]
</div>
<div class="logo">
<a href="http://www.cppreference.com" name="dokuwiki__top" id="dokuwiki__top" accesskey="h" title="[ALT+H]">C++ Reference</a> </div>
<div class="clearer"></div>
</div>
<div class="breadcrumbs">
<span class="bchead">You are here: </span><a href="../start.html" title="start">C++ Reference</a> » <a href="../string/start.html" title="string:start">C++ Strings</a> » <a href="../string/find_first_not_of.html" title="string:find_first_not_of">find_first_not_of</a> </div>
</div>
<div class="plugin_translation"><span>Translations of this page<sup><a href="../localization.html" class="wikilink1" title="localization">?</a></sup>:</span> <ul> <li><div class="li"><span class="curid"><a href="../string/find_first_not_of.html" class="wikilink1" title="string:find_first_not_of">en</a></span></div></li> <li><div class="li"><a href="../br-pt/string/find_first_not_of.html" class="wikilink1" title="br-pt:string:find_first_not_of">br-pt</a></div></li> <li><div class="li"><a href="../cn/string/find_first_not_of.html" class="wikilink2" title="cn:string:find_first_not_of" rel="nofollow">cn</a></div></li> <li><div class="li"><a href="../cz/string/find_first_not_of.html" class="wikilink2" title="cz:string:find_first_not_of" rel="nofollow">cz</a></div></li> <li><div class="li"><a href="../de/string/find_first_not_of.html" class="wikilink2" title="de:string:find_first_not_of" rel="nofollow">de</a></div></li> <li><div class="li"><a href="../es/string/find_first_not_of.html" class="wikilink2" title="es:string:find_first_not_of" rel="nofollow">es</a></div></li> <li><div class="li"><a href="../fr/string/find_first_not_of.html" class="wikilink2" title="fr:string:find_first_not_of" rel="nofollow">fr</a></div></li> <li><div class="li"><a href="../it/string/find_first_not_of.html" class="wikilink2" title="it:string:find_first_not_of" rel="nofollow">it</a></div></li> <li><div class="li"><a href="../jp/string/find_first_not_of.html" class="wikilink1" title="jp:string:find_first_not_of">jp</a></div></li> <li><div class="li"><a href="../nl/string/find_first_not_of.html" class="wikilink2" title="nl:string:find_first_not_of" rel="nofollow">nl</a></div></li> <li><div class="li"><a href="../pl/string/find_first_not_of.html" class="wikilink2" title="pl:string:find_first_not_of" rel="nofollow">pl</a></div></li> <li><div class="li"><a href="../ro/string/find_first_not_of.html" class="wikilink2" title="ro:string:find_first_not_of" rel="nofollow">ro</a></div></li> <li><div class="li"><a href="../ru/string/find_first_not_of.html" class="wikilink2" title="ru:string:find_first_not_of" rel="nofollow">ru</a></div></li> <li><div class="li"><a href="../sk/string/find_first_not_of.html" class="wikilink2" title="sk:string:find_first_not_of" rel="nofollow">sk</a></div></li> <li><div class="li"><a href="../tr/string/find_first_not_of.html" class="wikilink2" title="tr:string:find_first_not_of" rel="nofollow">tr</a></div></li> <li><div class="li"><a href="../tw/string/find_first_not_of.html" class="wikilink2" title="tw:string:find_first_not_of" rel="nofollow">tw</a></div></li></ul></div>
<div class="page">
<script src="http://www.google-analytics.com/urchin.js" type="text/javascript">
</script>
<script type="text/javascript">
_uacct = "UA-2828341-1";
urchinTracker();
</script>
<!-- wikipage start -->
<h2><a name="find_first_not_of" id="find_first_not_of">find_first_not_of</a></h2>
<div class="level2">
<p>
Syntax:
</p>
<pre class="c code c++" style="font-family:monospace;"> <span class="co2">#include <string></span>
size_type find_first_not_of<span class="br0">(</span> <span class="kw4">const</span> string<span class="sy0">&</span> str<span class="sy0">,</span> size_type index <span class="sy0">=</span> 0 <span class="br0">)</span> <span class="kw4">const</span><span class="sy0">;</span>
size_type find_first_not_of<span class="br0">(</span> <span class="kw4">const</span> <span class="kw4">char</span><span class="sy0">*</span> str<span class="sy0">,</span> size_type index <span class="sy0">=</span> 0 <span class="br0">)</span> <span class="kw4">const</span><span class="sy0">;</span>
size_type find_first_not_of<span class="br0">(</span> <span class="kw4">const</span> <span class="kw4">char</span><span class="sy0">*</span> str<span class="sy0">,</span> size_type index<span class="sy0">,</span> size_type num <span class="br0">)</span> <span class="kw4">const</span><span class="sy0">;</span>
size_type find_first_not_of<span class="br0">(</span> <span class="kw4">char</span> ch<span class="sy0">,</span> size_type index <span class="sy0">=</span> 0 <span class="br0">)</span> <span class="kw4">const</span><span class="sy0">;</span></pre>
<p>
The find_first_not_of() function either:
</p>
<ul>
<li class="level1"><div class="li"> returns the index of the first character within the current string that does not match any character in str, beginning the search at index, string::npos if nothing is found,</div>
</li>
<li class="level1"><div class="li"> searches the current string, beginning at index, for any character that does not match the first num characters in str, returning the index in the current string of the first character found that meets this criteria, otherwise returning string::npos,</div>
</li>
<li class="level1"><div class="li"> or returns the index of the first occurrence of a character that does not match ch in the current string, starting the search at index, string::npos if nothing is found.</div>
</li>
</ul>
<p>
For example, the following code searches a string of text for the first
character that is not a lower-case character, space, comma, or hypen:
</p>
<pre class="c code c++" style="font-family:monospace;"> <span class="kw4">string</span> lower_case <span class="sy0">=</span> <span class="st0">"abcdefghijklmnopqrstuvwxyz ,-"</span><span class="sy0">;</span>
<span class="kw4">string</span> str <span class="sy0">=</span> <span class="st0">"this is the lower-case part, AND THIS IS THE UPPER-CASE PART"</span><span class="sy0">;</span>
<a href="http://www.opengroup.org/onlinepubs/009695399/functions/cout.html"><span class="kw3">cout</span></a> <span class="sy0"><<</span> <span class="st0">"first non-lower-case letter in str at: "</span> <span class="sy0"><<</span> str.<span class="me1">find_first_not_of</span><span class="br0">(</span>lower_case<span class="br0">)</span> <span class="sy0"><<</span> endl<span class="sy0">;</span></pre>
<p>
When run, find_first_not_of() finds the first upper-case letter in str at index
29 and displays this output:
</p>
<pre class="code">
first non-lower-case letter in str at: 29</pre>
<p>
Related Topics: <a href="../string/find.html" class="wikilink1" title="string:find">find</a>, <span class="curid"><a href="../string/find_first_not_of.html" class="wikilink1" title="string:find_first_not_of">find_first_not_of</a></span>, <a href="../string/find_first_of.html" class="wikilink1" title="string:find_first_of">find_first_of</a>, <a href="../string/find_last_not_of.html" class="wikilink1" title="string:find_last_not_of">find_last_not_of</a>, <a href="../string/find_last_of.html" class="wikilink1" title="string:find_last_of">find_last_of</a>, <a href="../string/rfind.html" class="wikilink1" title="string:rfind">rfind</a>
</p>
</div>
<div class="secedit"><form class="button btn_secedit" method="post" action="/wiki/string/find_first_not_of"><div class="no"><input type="hidden" name="do" value="edit" /><input type="hidden" name="lines" value="3-" /><input type="hidden" name="rev" value="1271436480" /><input type="submit" value="Edit" class="button" title="find_first_not_of" /></div></form></div>
<!-- wikipage stop -->
</div>
<div class="clearer"> </div>
<div class="stylefoot">
<div class="meta">
<div class="user">
</div>
<!--
<div class="doc">
string/find_first_not_of.txt · Last modified: 04/16/2010 09:48 by 193.36.230.96 </div>
-->
</div>
<div class="bar" id="bar__bottom">
<div class="bar-left" id="bar__bottomleft">
<a href="../string/find_first_not_of.html" class="action edit" accesskey="e" rel="nofollow">Edit this page</a> •
<a href="../string/find_first_not_of.html" class="action revisions" accesskey="o" rel="nofollow">Old revisions</a> </div>
<div class="bar-right" id="bar__bottomright">
•
•
•
<a href="../string/find_first_not_of.html" class="action login" rel="nofollow">Login</a> •
<a href="../string/find_first_not_of.html" class="action index" accesskey="x" rel="nofollow">Index</a> •
<a href="../string/find_first_not_of.html" class="action recent" accesskey="r" rel="nofollow">Recent changes</a> •
<a href="../feed.php.html" title="Recent changes RSS feed">RSS</a> •
<a href='http://creativecommons.org/licenses/by/3.0/us/' title='Creative Commons license'>cc</a> •
<form action="/wiki/" accept-charset="utf-8" class="search" id="dw__search"><div class="no"><input type="hidden" name="do" value="search" /><input type="text" id="qsearch__in" accesskey="f" name="id" class="edit" title="[ALT+F]" /><input type="submit" value="Search" class="button" title="Search" /><div id="qsearch__out" class="ajax_qsearch JSpopup"></div></div></form>
</div>
<div class="clearer"></div>
</div>
</div>
</div>
<div class="no"><img src="/wiki/lib/exe/indexer.php?id=string%3Afind_first_not_of&1273195203" width="1" height="1" alt="" /></div>
</body>
</html>