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<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../basic_ifstream.html" title="cpp/io/basic ifstream"><span class="t-lines"><span>basic_ifstream</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../basic_ofstream.html" title="cpp/io/basic ofstream"><span class="t-lines"><span>basic_ofstream</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../basic_fstream.html" title="cpp/io/basic fstream"><span class="t-lines"><span>basic_fstream</span></span></a></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> String I/O </td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../basic_istringstream.html" title="cpp/io/basic istringstream"><span class="t-lines"><span>basic_istringstream</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../basic_ostringstream.html" title="cpp/io/basic ostringstream"><span class="t-lines"><span>basic_ostringstream</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../basic_stringstream.html" title="cpp/io/basic stringstream"><span class="t-lines"><span>basic_stringstream</span></span></a></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Array I/O </td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../istrstream.html" title="cpp/io/istrstream"><span class="t-lines"><span>istrstream</span></span></a></div><div><span class="t-lines"><span><span class="t-mark">(deprecated)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../ostrstream.html" title="cpp/io/ostrstream"><span class="t-lines"><span>ostrstream</span></span></a></div><div><span class="t-lines"><span><span class="t-mark">(deprecated)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../strstream.html" title="cpp/io/strstream"><span class="t-lines"><span>strstream</span></span></a></div><div><span class="t-lines"><span><span class="t-mark">(deprecated)</span></span></span></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Types </td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../streamoff.html" title="cpp/io/streamoff"><span class="t-lines"><span>streamoff</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../streamsize.html" title="cpp/io/streamsize"><span class="t-lines"><span>streamsize</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../fpos.html" title="cpp/io/fpos"><span class="t-lines"><span>fpos</span></span></a></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Error category interface </td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../iostream_category.html" title="cpp/io/iostream category"><span class="t-lines"><span>iostream_category</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../io_errc.html" title="cpp/io/io errc"><span class="t-lines"><span>io_errc</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
</table></div><div><span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/io/navbar_content&action=edit">[edit]</a></span></div></div></div></div><div class="t-navbar-sep"> </div><div class="t-navbar-head"><a href="../basic_ostream.html" title="cpp/io/basic ostream"><tt>std::basic_ostream</tt></a><div class="t-navbar-menu"><div><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv-h1"><td colspan="5"> Global objects</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../cout.html" title="cpp/io/cout"><span class="t-lines"><span>cout</span><span>wcout</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../cerr.html" title="cpp/io/cerr"><span class="t-lines"><span>cerr</span><span>wcerr</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="../clog.html" title="cpp/io/clog"><span class="t-lines"><span>clog</span><span>wclog</span></span></a></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Member functions</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="basic_ostream.html" title="cpp/io/basic ostream/basic ostream"><span class="t-lines"><span>basic_ostream::basic_ostream</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="~basic_ostream.html" title="cpp/io/basic ostream/~basic ostream"><span class="t-lines"><span>basic_ostream::~basic_ostream</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="operator=.html" title="cpp/io/basic ostream/operator="><span class="t-lines"><span>basic_ostream::operator=</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Formatted output </td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><strong class="selflink"><span class="t-lines"><span>basic_ostream::operator<<</span></span></strong></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Unformatted output </td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="put.html" title="cpp/io/basic ostream/put"><span class="t-lines"><span>basic_ostream::put</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="write.html" title="cpp/io/basic ostream/write"><span class="t-lines"><span>basic_ostream::write</span></span></a></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Positioning </td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="tellp.html" title="cpp/io/basic ostream/tellp"><span class="t-lines"><span>basic_ostream::tellp</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="seekp.html" title="cpp/io/basic ostream/seekp"><span class="t-lines"><span>basic_ostream::seekp</span></span></a></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Miscellaneous </td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="flush.html" title="cpp/io/basic ostream/flush"><span class="t-lines"><span>basic_ostream::flush</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="swap.html" title="cpp/io/basic ostream/swap"><span class="t-lines"><span>basic_ostream::swap</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Member classes</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="sentry.html" title="cpp/io/basic ostream/sentry"><span class="t-lines"><span>basic_ostream::sentry</span></span></a></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Non-member functions</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="operator_ltlt2.html" title="cpp/io/basic ostream/operator ltlt2"><span class="t-lines"><span>operator<<<span class="t-dsc-small">(std::basic_ostream)</span></span></span></a></div></div></td></tr>
</table></div><div><span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/io/basic_ostream/navbar_content&action=edit">[edit]</a></span></div></div></div></div><div class="t-navbar-sep"> </div></div>
<table class="t-dcl-begin"><tbody>
<tr class="t-dcl">
<td> <div><span class="mw-geshi cpp source-cpp">basic_ostream<span class="sy3">&</span> operator<span class="sy1"><<</span><span class="br0">(</span> <span class="kw4">short</span> value <span class="br0">)</span><span class="sy4">;</span><br />
basic_ostream<span class="sy3">&</span> operator<span class="sy1"><<</span><span class="br0">(</span> <span class="kw4">unsigned</span> <span class="kw4">short</span> value <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (1) </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl">
<td> <div><span class="mw-geshi cpp source-cpp">basic_ostream<span class="sy3">&</span> operator<span class="sy1"><<</span><span class="br0">(</span> <span class="kw4">int</span> value <span class="br0">)</span><span class="sy4">;</span><br />
basic_ostream<span class="sy3">&</span> operator<span class="sy1"><<</span><span class="br0">(</span> <span class="kw4">unsigned</span> <span class="kw4">int</span> value <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (2) </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl">
<td> <div><span class="mw-geshi cpp source-cpp">basic_ostream<span class="sy3">&</span> operator<span class="sy1"><<</span><span class="br0">(</span> <span class="kw4">long</span> value <span class="br0">)</span><span class="sy4">;</span><br />
basic_ostream<span class="sy3">&</span> operator<span class="sy1"><<</span><span class="br0">(</span> <span class="kw4">unsigned</span> <span class="kw4">long</span> value <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (3) </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl t-since-cxx11">
<td> <div><span class="mw-geshi cpp source-cpp">basic_ostream<span class="sy3">&</span> operator<span class="sy1"><<</span><span class="br0">(</span> <span class="kw4">long</span> <span class="kw4">long</span> value <span class="br0">)</span><span class="sy4">;</span><br />
basic_ostream<span class="sy3">&</span> operator<span class="sy1"><<</span><span class="br0">(</span> <span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">long</span> value <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (4) </td>
<td> <span class="t-mark-rev t-since-cxx11">(since C++11)</span> </td>
</tr>
<tr class="t-dcl">
<td> <div><span class="mw-geshi cpp source-cpp">basic_ostream<span class="sy3">&</span> operator<span class="sy1"><<</span><span class="br0">(</span> <span class="kw4">float</span> value <span class="br0">)</span><span class="sy4">;</span><br />
<p>basic_ostream<span class="sy3">&</span> operator<span class="sy1"><<</span><span class="br0">(</span> <span class="kw4">double</span> value <span class="br0">)</span><span class="sy4">;</span><br />
</p>
basic_ostream<span class="sy3">&</span> operator<span class="sy1"><<</span><span class="br0">(</span> <span class="kw4">long</span> <span class="kw4">double</span> value <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (5) </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl">
<td> <div><span class="mw-geshi cpp source-cpp">basic_ostream<span class="sy3">&</span> operator<span class="sy1"><<</span><span class="br0">(</span> <span class="kw4">bool</span> value <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (6) </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl">
<td> <div><span class="mw-geshi cpp source-cpp">basic_ostream<span class="sy3">&</span> operator<span class="sy1"><<</span><span class="br0">(</span> <span class="kw4">const</span> <span class="kw4">void</span><span class="sy2">*</span> value <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (7) </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl">
<td> <div><span class="mw-geshi cpp source-cpp">basic_ostream<span class="sy3">&</span> operator<span class="sy1"><<</span><span class="br0">(</span> <a href="../basic_streambuf.html"><span class="kw1390">std::<span class="me2">basic_streambuf</span></span></a><span class="sy1"><</span>CharT, Traits<span class="sy1">></span><span class="sy2">*</span> sb<span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (8) </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl">
<td> <div><span class="mw-geshi cpp source-cpp">basic_ostream<span class="sy3">&</span> operator<span class="sy1"><<</span><span class="br0">(</span><br />
    <a href="../ios_base.html"><span class="kw1393">std::<span class="me2">ios_base</span></span></a><span class="sy3">&</span> <span class="br0">(</span><span class="sy2">*</span>func<span class="br0">)</span><span class="br0">(</span><a href="../ios_base.html"><span class="kw1393">std::<span class="me2">ios_base</span></span></a><span class="sy3">&</span><span class="br0">)</span> <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (9) </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl">
<td> <div><span class="mw-geshi cpp source-cpp">basic_ostream<span class="sy3">&</span> operator<span class="sy1"><<</span><span class="br0">(</span><br />
    <a href="../basic_ios.html"><span class="kw1435">std::<span class="me2">basic_ios</span></span></a><span class="sy1"><</span>CharT,Traits<span class="sy1">></span><span class="sy3">&</span> <span class="br0">(</span><span class="sy2">*</span>func<span class="br0">)</span><span class="br0">(</span><a href="../basic_ios.html"><span class="kw1435">std::<span class="me2">basic_ios</span></span></a><span class="sy1"><</span>CharT,Traits<span class="sy1">></span><span class="sy3">&</span><span class="br0">)</span> <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (10) </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl">
<td> <div><span class="mw-geshi cpp source-cpp">basic_ostream<span class="sy3">&</span> operator<span class="sy1"><<</span><span class="br0">(</span><br />
    <a href="../basic_ostream.html"><span class="kw1438">std::<span class="me2">basic_ostream</span></span></a><span class="sy1"><</span>CharT,Traits<span class="sy1">></span><span class="sy3">&</span> <span class="br0">(</span><span class="sy2">*</span>func<span class="br0">)</span><span class="br0">(</span><a href="../basic_ostream.html"><span class="kw1438">std::<span class="me2">basic_ostream</span></span></a><span class="sy1"><</span>CharT,Traits<span class="sy1">></span><span class="sy3">&</span><span class="br0">)</span> <span class="br0">)</span><span class="sy4">;</span></span></div></td>
<td> (11) </td>
<td class="t-dcl-nopad"> </td>
</tr>
<tr class="t-dcl-sep"><td></td><td></td><td></td></tr>
</tbody></table>
<p>Inserts data into the stream.
</p>
<div class="t-li1"><span class="t-li">1-2)</span> Behaves as an <a href="../../concept/FormattedOutputFunction.html" title="cpp/concept/FormattedOutputFunction"><code>FormattedOutputFunction</code></a>. After constructing and checking the sentry object, if <code>value</code> is <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">short</span></span></span> or <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">int</span></span></span>, then casts it to <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">unsigned</span> <span class="kw4">short</span></span></span> or <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">unsigned</span> <span class="kw4">int</span></span></span> if <span class="t-c"><span class="mw-geshi cpp source-cpp">ios_base<span class="sy4">::</span><span class="me2">flags</span><span class="br0">(</span><span class="br0">)</span> <span class="sy3">&</span> ios_base<span class="sy4">::</span><span class="me2">basefield</span></span></span> is <span class="t-c"><span class="mw-geshi cpp source-cpp">ios_base<span class="sy4">::</span><span class="me2">oct</span></span></span> or <span class="t-c"><span class="mw-geshi cpp source-cpp">ios_base<span class="sy4">::</span><span class="me2">hex</span></span></span>. After that, casts to <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">long</span></span></span> in any case and outputs as in <span class="t-v">(3)</span>. If <code>value</code> is <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">unsigned</span> <span class="kw4">short</span></span></span> or <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">unsigned</span> <span class="kw4">int</span></span></span>, casts to <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">unsigned</span> <span class="kw4">long</span></span></span> and outputs as in <span class="t-v">(3)</span>.</div>
<div class="t-li1"><span class="t-li">3-7)</span> Behaves as an <a href="../../concept/FormattedOutputFunction.html" title="cpp/concept/FormattedOutputFunction"><code>FormattedOutputFunction</code></a>. After constructing and checking the sentry object, inserts an integer, floating point, boolean or generic pointer value by calling <a href="../../locale/num_put/put.html" title="cpp/locale/num put/put"><tt>num_put::put()</tt></a>. If the end of file condition was encountered during output (<span class="t-c"><span class="mw-geshi cpp source-cpp">put<span class="br0">(</span><span class="br0">)</span>.<span class="me1">failed</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">==</span> <span class="kw2">true</span></span></span>), sets <span class="t-c"><span class="mw-geshi cpp source-cpp">ios<span class="sy4">::</span><span class="me2">badbit</span></span></span>.</div>
<div class="t-li1"><span class="t-li">8)</span> Behaves as an <a href="../../concept/UnformattedOutputFunction.html" title="cpp/concept/UnformattedOutputFunction"><code>UnformattedOutputFunction</code></a>. After constructing and checking the sentry object, checks if <code>sb</code> is a null pointer. If it is, executes <span class="t-c"><span class="mw-geshi cpp source-cpp">setstate<span class="br0">(</span>badbit<span class="br0">)</span></span></span> and exits. Otherwise, extracts characters from the input sequence controlled by <code>sb</code> and inserts them into <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> until one of the following conditions are met:
<dl><dd><ul><li> end-of-file occurs on the input sequence;
</li><li> inserting in the output sequence fails (in which case the character to be inserted is not extracted);
</li><li> an exception occurs (in which case the exception is caught).
</li></ul>
</dd></dl>
If no characters were inserted, executes <span class="t-c"><span class="mw-geshi cpp source-cpp">setstate<span class="br0">(</span>failbit<span class="br0">)</span></span></span>. If an exception was thrown while extracting, sets <span class="t-c"><span class="mw-geshi cpp source-cpp">failbit</span></span> and, if <code>failbit</code> is set in <span class="t-c"><span class="mw-geshi cpp source-cpp">exceptions<span class="br0">(</span><span class="br0">)</span></span></span>, rethrows the exception.</div>
<div class="t-li1"><span class="t-li">9-11)</span> Calls <span class="t-c"><span class="mw-geshi cpp source-cpp">func<span class="br0">(</span><span class="sy2">*</span>this<span class="br0">)</span><span class="sy4">;</span></span></span>. These overloads are used to implement output I/O manipulators such as <span class="t-lc">std::endl</span>.</div>
<table id="toc" class="toc"><tr><td><div id="toctitle"><h2>Contents</h2></div>
<ul>
<li class="toclevel-1 tocsection-1"><a href="operator_ltlt.html#Parameters"><span class="tocnumber">1</span> <span class="toctext">Parameters</span></a></li>
<li class="toclevel-1 tocsection-2"><a href="operator_ltlt.html#Return_value"><span class="tocnumber">2</span> <span class="toctext">Return value</span></a></li>
<li class="toclevel-1 tocsection-3"><a href="operator_ltlt.html#Notes"><span class="tocnumber">3</span> <span class="toctext">Notes</span></a></li>
<li class="toclevel-1 tocsection-4"><a href="operator_ltlt.html#Example"><span class="tocnumber">4</span> <span class="toctext">Example</span></a></li>
<li class="toclevel-1 tocsection-5"><a href="operator_ltlt.html#See_also"><span class="tocnumber">5</span> <span class="toctext">See also</span></a></li>
</ul>
</td></tr></table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/io/basic_ostream/operator_ltlt&action=edit&section=1" title="Edit section: Parameters">edit</a>]</span> <span class="mw-headline" id="Parameters">Parameters</span></h3>
<table class="t-par-begin">
<tr class="t-par">
<td> value
</td>
<td> -
</td>
<td> integer, floating-point, boolean, or pointer value to insert
</td></tr>
<tr class="t-par">
<td> func
</td>
<td> -
</td>
<td> function to call
</td></tr>
<tr class="t-par">
<td> sb
</td>
<td> -
</td>
<td> pointer to the streambuffer to read the data from
</td></tr></table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/io/basic_ostream/operator_ltlt&action=edit&section=2" title="Edit section: Return value">edit</a>]</span> <span class="mw-headline" id="Return_value">Return value</span></h3>
<div class="t-li1"><span class="t-li">1-10)</span> <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span></div>
<div class="t-li1"><span class="t-li">11)</span> <span class="t-c"><span class="mw-geshi cpp source-cpp">func<span class="br0">(</span><span class="sy2">*</span>this<span class="br0">)</span></span></span></div>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/io/basic_ostream/operator_ltlt&action=edit&section=3" title="Edit section: Notes">edit</a>]</span> <span class="mw-headline" id="Notes">Notes</span></h3>
<p>There are no overload for pointers to volatile or function pointers (other than the ones with signatures accepted by the <span class="t-v">(9-11)</span> overloads). Attempting to output such objects invokes implicit conversion to <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span></span></span>, and, for any non-null pointer value, the value <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="nu0">1</span></span></span> is printed (unless <span class="t-c"><span class="mw-geshi cpp source-cpp">boolalpha</span></span> was set).
</p><p>The arguments of type <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">char</span></span></span> and <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span></span></span> are handled by the <a href="operator_ltlt2.html" title="cpp/io/basic ostream/operator ltlt2">non-member overloads</a> of <code>operator<<</code>.
</p>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/io/basic_ostream/operator_ltlt&action=edit&section=4" title="Edit section: Example">edit</a>]</span> <span class="mw-headline" id="Example">Example</span></h3>
<div class="t-example"><div class="t-example-live-link"><div class="coliru-btn coliru-btn-run-init">Run this code</div></div>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="co2">#include <iostream></span>
<span class="co2">#include <iomanip></span>
<span class="co2">#include <sstream></span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="../basic_istringstream.html"><span class="kw1458">std::<span class="me2">istringstream</span></span></a> input<span class="br0">(</span><span class="st0">" <span class="es1">\"</span>Some text.<span class="es1">\"</span> "</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">volatile</span> <span class="kw4">int</span> n <span class="sy1">=</span> <span class="nu0">42</span><span class="sy4">;</span>
<span class="kw4">double</span> f <span class="sy1">=</span> <span class="nu16">3.14</span><span class="sy4">;</span>
<span class="kw4">bool</span> b <span class="sy1">=</span> <span class="kw2">true</span><span class="sy4">;;</span>
<a href="../cout.html"><span class="kw1481">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> n <span class="co1">// int overload</span>
<span class="sy1"><<</span> <span class="st0">' '</span> <span class="co1">// non-member overload</span>
<span class="sy1"><<</span> <a href="../manip/boolalpha.html"><span class="kw1487">std::<span class="me2">boolalpha</span></span></a> <span class="sy1"><<</span> b <span class="co1">// bool overload</span>
<span class="sy1"><<</span> <span class="st0">" "</span> <span class="co1">// non-member overload</span>
<span class="sy1"><<</span> <a href="../manip/fixed.html"><span class="kw1507">std::<span class="me2">fixed</span></span></a> <span class="sy1"><<</span> f <span class="co1">// double overload</span>
<span class="sy1"><<</span> input.<span class="me1">rdbuf</span><span class="br0">(</span><span class="br0">)</span> <span class="co1">// streambuf overload</span>
<span class="sy1"><<</span> <span class="sy3">&</span>n <span class="co1">// bool overload</span>
<span class="sy1"><<</span> <a href="../manip/endl.html"><span class="kw1514">std::<span class="me2">endl</span></span></a><span class="sy4">;</span> <span class="co1">// function overload</span>
<span class="br0">}</span></pre></div></div>
<p>Output:
</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="text source-text"><pre class="de1">42 true 3.140000 "Some text." true</pre></div></div>
</div>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/io/basic_ostream/operator_ltlt&action=edit&section=5" title="Edit section: See also">edit</a>]</span> <span class="mw-headline" id="See_also">See also</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="operator_ltlt2.html" title="cpp/io/basic ostream/operator ltlt2"> <span class="t-lines"><span>operator<<<span class="t-dsc-small">(std::basic_ostream)</span></span></span></a></div></div>
</td>
<td> inserts character data <br /> <span class="t-mark">(function template)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/io/basic_ostream/dsc_operator_ltlt2&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../../string/basic_string/operator_ltltgtgt.html" title="cpp/string/basic string/operator ltltgtgt"> <span class="t-lines"><span>operator<<</span><span>operator>></span></span></a></div></div>
</td>
<td> performs stream I/O of strings <br /> <span class="t-mark">(function template)</span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../../utility/bitset/operator_ltltgtgt2.html" title="cpp/utility/bitset/operator ltltgtgt2"> <span class="t-lines"><span>operator<<</span><span>operator>></span></span></a></div></div>
</td>
<td> performs stream input and output of bitsets <br /> <span class="t-mark">(function)</span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../../numeric/complex/operator_ltltgtgt.html" title="cpp/numeric/complex/operator ltltgtgt"> <span class="t-lines"><span>operator<<</span><span>operator>></span></span></a></div></div>
</td>
<td> serializes and deserializes a complex number <br /> <span class="t-mark">(function template)</span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../../numeric/random/linear_congruential_engine/operator_ltltgtgt.html" title="cpp/numeric/random/linear congruential engine/operator ltltgtgt"> <span class="t-lines"><span>operator<<</span><span>operator>></span></span></a></div></div>
</td>
<td> performs stream input and output on pseudo-random number engine <br /> <span class="t-mark">(function template)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/numeric/random/engine/dsc_operator_ltltgtgt&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../../numeric/random/uniform_int_distribution/operator_ltltgtgt.html" title="cpp/numeric/random/uniform int distribution/operator ltltgtgt"> <span class="t-lines"><span>operator<<</span><span>operator>></span></span></a></div></div>
</td>
<td> performs stream input and output on pseudo-random number distribution <br /> <span class="t-mark">(function template)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/numeric/random/distribution/dsc_operator_ltltgtgt&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="put.html" title="cpp/io/basic ostream/put"> <span class="t-lines"><span>put</span></span></a></div></div>
</td>
<td> inserts a character <br /> <span class="t-mark">(public member function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/io/basic_ostream/dsc_put&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="write.html" title="cpp/io/basic ostream/write"> <span class="t-lines"><span>write</span></span></a></div></div>
</td>
<td> inserts blocks of characters <br /> <span class="t-mark">(public member function)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/io/basic_ostream/dsc_write&action=edit">[edit]</a></span>
</td></tr>
</table>
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