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    <a href="../index-2.html">cppreference.com</a> &gt; <a href=
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    C++ String Streams
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  <p>String streams are similar to the <a
  href="http://www.cppreference.com/cppio/index.html">&lt;iostream&gt;
  and &lt;fstream&gt;</a> libraries, except that string streams allow
  you to perform I/O on strings instead of streams.  The
  &lt;sstream&gt; library provides functionality similar to <a
  href="http://www.cppreference.com/stdio/sscanf.html">sscanf()</a>
  and <a
  href="http://www.cppreference.com/stdio/sprintf.html">sprintf()</a>
  in the standard C library.  Three main classes are available in
  &lt;sstream&gt;:</p>

  <ul>
    <li>stringstream - allows input and output</li>
    <li>istringstream - allows input only</li>
    <li>ostringstream - allows output only</li>
  </ul>

  <p>String streams are actually subclasses of iostreams, so
  <strong>all of the functions available for iostreams are also
  available for stringstream</strong>.  See the <a
  href="http://www.cppreference.com/cppio/index.html">C++ I/O
  functions</a> for more information.</p>

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      <a href="constructors.html">Constructors</a>
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      create new string streams
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      <a href="operators.html">Operators</a>
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      read from and write to string streams
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      <a href="rdbuf.html">rdbuf</a>
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      get the buffer for a string stream
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      <td class="category-table-td">
      <a href="str.html">str</a>
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      get or set the stream's string
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