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<a href="../index-2.html">cppreference.com</a> > <a href=
"index.html">C++ Strings</a> > <a href="rfind.html">rfind</a>
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<div class="name-format">
rfind
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<div class="syntax-name-format">
Syntax:
</div>
<pre class="syntax-box">
#include <string>
<strong>size_type</strong> rfind( const string& str, <strong>size_type</strong> index );
<strong>size_type</strong> rfind( const char* str, <strong>size_type</strong> index );
<strong>size_type</strong> rfind( const char* str, <strong>size_type</strong> index, <strong>size_type</strong> num );
<strong>size_type</strong> rfind( char ch, <strong>size_type</strong> index );
</pre>
<p>The rfind() function either:</p>
<ul>
<li>returns the location of the first occurrence of <em>str</em> in
the current string, doing a reverse search from <em>index</em>,
string::npos if nothing is found,</li>
<li>returns the location of the first occurrence of <em>str</em> in
the current string, doing a reverse search from <em>index</em>,
searching at most <em>num</em> characters, string::npos if nothing
is found,</li>
<li>or returns the location of the first occurrence of <em>ch</em>
in the current string, doing a reverse search from <em>index</em>,
string::npos if nothing is found.</li>
</ul>
<p>For example, in the following code, the first call to rfind()
returns string::npos, because the target word is not within the first
8 characters of the string. However, the second call returns 9,
because the target word is within 20 characters of the beginning of
the string.</p>
<pre class="prettyprint">
int loc;
string s = "My cat's breath smells like cat food.";
loc = s.rfind( "breath", 8 );
cout << "The word breath is at index " << loc << endl;
loc = s.rfind( "breath", 20 );
cout << "The word breath is at index " << loc << endl;
</pre>
<div class="related-name-format">
Related topics:
</div>
<div class="related-content">
<a href="find.html">find</a><br>
<a href="find_first_not_of.html">find_first_not_of</a><br>
<a href="find_first_of.html">find_first_of</a><br>
<a href="find_last_not_of.html">find_last_not_of</a><br>
<a href="find_last_of.html">find_last_of</a>
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