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从www.CppReference.com打包的C++参考手册

    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;set&gt;
  iterator find( const <a href=
"../containers.html">key_type</a>&amp; key );
</pre>

  <p>The find() function returns an iterator to <em>key</em>, or an
  iterator to the end of the multiset if <em>key</em> is not found.</p>

  <p>find() runs in <a href="../complexity.html">logarithmic
  time</a>.</p>
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  <div class="name-format">
    insert
  </div>

  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;set&gt;
  iterator insert( iterator pos, const <a href=
"../containers.html">TYPE</a>&amp; val );
  iterator insert( const <a href=
"../containers.html">TYPE</a>&amp; val );
  void insert( <a href=
"../iterators.html">input_iterator</a> start, <a href=
"../iterators.html">input_iterator</a> end );
</pre>

  <p>The function insert() either:</p>

  <ul>
    <li>inserts <em>val</em> after the element at <em>pos</em> (where
    <em>pos</em> is really just a suggestion as to where <em>val</em>
    should go, since multisets and multimaps are ordered), and returns
    an iterator to that element.</li>

    <li>inserts <em>val</em> into the multiset, returning an iterator
    to the element inserted.</li>

    <li>inserts a range of elements from <em>start</em> to
    <em>end</em>.</li>
  </ul>
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  <div class="name-format">
    key_comp
  </div>

  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;set&gt;
  key_compare key_comp() const;
</pre>

  <p>The function key_comp() returns the function that compares
  keys.</p>

  <p>key_comp() runs in <a href="../complexity.html">constant
  time</a>.</p>

  <div class="related-name-format">
    Related topics:
  </div>

  <div class="related-content">
    <a href="value_comp.html">value_comp</a>
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  <div class="name-format">
    lower_bound
  </div>

  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;set&gt;
  iterator lower_bound( const <a href=
"../containers.html">key_type</a>&amp; key );
</pre>

  <p>The lower_bound() function returns an iterator to the first
  element which has a value greater than or equal to key.</p>

  <p>lower_bound() runs in <a href="../complexity.html">logarithmic
  time</a>.</p>

  <div class="related-name-format">
    Related topics:
  </div>

  <div class="related-content">
    <a href="upper_bound.html">upper_bound</a>
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  <div class="name-format">
    max_size
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  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;set&gt;
  <strong>size_type</strong> max_size() const;
</pre>

  <p>The max_size() function returns the maximum number of elements
  that the multiset can hold. The max_size() function should not be
  confused with the <a href="size.html">size</a>() or (C++ Strings)
  <a href="../cppstring/capacity.html">capacity</a>() functions, which
  return the number of elements currently in the multiset and the the
  number of elements that the multiset will be able to hold before more
  memory will have to be allocated, respectively.</p>

  <div class="related-name-format">
    Related topics:
  </div>

  <div class="related-content">
    <a href="size.html">size</a>
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  <div class="name-format">
    rbegin
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  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;set&gt;
  <a href="../iterators.html">reverse_iterator</a> rbegin();
  const_<a href=
"../iterators.html">reverse_iterator</a> rbegin() const;
</pre>

  <p>The rbegin() function returns a <a href=
  "../iterators.html">reverse_iterator</a> to the end of the current
  multiset.</p>

  <p>rbegin() runs in <a href="../complexity.html">constant
  time</a>.</p>

  <div class="related-name-format">
    Related topics:
  </div>

  <div class="related-content">
    <a href="begin.html">begin</a><br>
    <a href="end.html">end</a><br>
    <a href="rend.html">rend</a>
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<hr>

  <div class="name-format">
    rend
  </div>

  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;set&gt;
  <a href="../iterators.html">reverse_iterator</a> rend();
  const_<a href="../iterators.html">reverse_iterator</a> rend() const;
</pre>

  <p>The function rend() returns a <a href=
  "../iterators.html">reverse_iterator</a> to the beginning of the
  current multiset.</p>

  <p>rend() runs in <a href="../complexity.html">constant time</a>.</p>

  <div class="related-name-format">
    Related topics:
  </div>

  <div class="related-content">
    <a href="begin.html">begin</a><br>
    <a href="end.html">end</a><br>
    <a href="rbegin.html">rbegin</a>
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<hr>

  <div class="name-format">
    size
  </div>

  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;set&gt;
  <strong>size_type</strong> size() const;
</pre>

  <p>The size() function returns the number of elements in the current
  multiset.</p>

  <div class="related-name-format">
    Related topics:
  </div>

  <div class="related-content">
    (C++ Strings) <a href="../cppstring/capacity.html">capacity</a><br>
    <a href="empty.html">empty</a><br>
    (C++ Strings) <a href="../cppstring/length.html">length</a><br>
    <a href="max_size.html">max_size</a><br>
    (C++ Strings) <a href="../cppstring/resize.html">resize</a>
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<hr>

  <div class="name-format">
    swap
  </div>

  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;set&gt;
  void swap( container&amp; from );
</pre>

  <p>The swap() function exchanges the elements of the current multiset
  with those of <em>from</em>. This function operates in <a href=
  "../complexity.html">constant time</a>.</p>

  <p>For example, the following code uses the swap() function to
  exchange the values of two strings:</p>
  <pre class="example-code">
   string first( &quot;This comes first&quot; );
   string second( &quot;And this is second&quot; );
   first.swap( second );
   cout &lt;&lt; first &lt;&lt; endl;
   cout &lt;&lt; second &lt;&lt; endl;          
</pre>

  <p>The above code displays:</p>
  <pre class="example-code">
   And this is second
   This comes first             
</pre>

  <div class="related-name-format">
    Related topics:
  </div>

  <div class="related-content">
    (C++ Lists) <a href="../cpplist/splice.html">splice</a>
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  <div class="name-format">
    upper_bound
  </div>

  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;set&gt;
  iterator upper_bound( const <a href=
"../containers.html">key_type</a>&amp; key );
</pre>

  <p>The function upper_bound() returns an iterator to the first
  element in the multiset with a key greater than <em>key</em>.</p>

  <div class="related-name-format">
    Related topics:
  </div>

  <div class="related-content">
    <a href="lower_bound.html">lower_bound</a>
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<hr>

  <div class="name-format">
    value_comp
  </div>

  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;set&gt;
  value_compare value_comp() const;
</pre>

  <p>The value_comp() function returns the function that compares
  values.</p>

  <p>value_comp() runs in <a href="../complexity.html">constant
  time</a>.</p>

  <div class="related-name-format">
    Related topics:
  </div>

  <div class="related-content">
    <a href="key_comp.html">key_comp</a>
  </div>
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