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<H2>ostrstream</H2>
<P><B>Library:</B>&nbsp;&nbsp;<A HREF="2-11.html">Input/output</A></P>

<PRE><HR><B><I>ostrstream</I></B> <IMG SRC="images/inherits.gif"> <B><I><A HREF="basic-ostream.html">basic_ostream</A></I></B> <IMG SRC="images/inherits.gif"> <B><I><A HREF="basic-ios.html">basic_ios</A></I></B> <IMG SRC="images/inherits.gif"> <B><I><A HREF="ios-base.html">ios_base</A></I></B> <HR></PRE>

<UL>
<LI><A HREF="#sec1">Local Index</A></LI>
<LI><A HREF="#sec2">Summary</A></LI>
<LI><A HREF="#sec3">Synopsis</A></LI>
<LI><A HREF="#sec4">Description</A></LI>
<LI><A HREF="#sec5">Interface</A></LI>
<LI><A HREF="#sec6">Member Types</A></LI>
<LI><A HREF="#sec7">Constructors</A></LI>
<LI><A HREF="#sec8">Destructors</A></LI>
<LI><A HREF="#sec9">Member Functions</A></LI>
<LI><A HREF="#sec10">Example</A></LI>
<LI><A HREF="#sec11">See Also</A></LI>
<LI><A HREF="#sec12">Standards Conformance</A></LI>
</UL>
<A NAME="sec1"><H3>Local Index</H3></A>
<H4>Members</H4>
<UL><TABLE CELLPADDING=3>
<TR><TD VALIGN=top>
<A HREF="#idx1079">char_type</A><BR>
<A HREF="#idx1087">freeze()</A><BR>
<A HREF="#idx1080">int_type</A><BR>
</TD>
<TD VALIGN=top><A HREF="#idx1081">off_type</A><BR>
<A HREF="#idx1084">ostrstream()</A><BR>
<A HREF="#idx1088">pcount()</A><BR>
</TD>
<TD VALIGN=top><A HREF="#idx1082">pos_type</A><BR>
<A HREF="#idx1089">rdbuf()</A><BR>
<A HREF="#idx1090">str()</A><BR>
</TD>
<TD VALIGN=top><A HREF="#idx1083">traits_type</A><BR>
<A HREF="#idx1086">~ostrstream()</A><BR>
</TD></TR>
</TABLE></UL>

<A NAME="sec2"><H3>Summary</H3></A>
<P>Writes to an array in memory</P>
<A NAME="sec3"><H3>Synopsis</H3></A>

<PRE>#include &lt;strstream&gt; 

namespace std {
  class ostrstream;
}
</PRE>
<A NAME="sec4"><H3>Description</H3></A>
<P>The class <B><I>ostrstream</I></B> writes to an array in memory. It uses a private  <B><I><A HREF="strstreambuf.html">strstreambuf</A></I></B> object to control the associated array object. It inherits from <B><I><A HREF="basic-ostream.html">basic_ostream</A></I></B>, and therefore can use all the formatted and unformatted output functions.</P>
<BLOCKQUOTE><HR><B>
NOTE -- This is a deprecated feature and might not be available in future versions.
</B><HR></BLOCKQUOTE>
<A NAME="sec5"><H3>Interface</H3></A>

<UL><PRE>namespace std {

  class ostrstream 
  : public basic_ostream&lt;char&gt; {

    public:

    typedef char                           char_type;
    typedef char_traits&lt;char_type&gt;         traits_type;
    typedef typename traits_type::int_type int_type;
    typedef typename traits_type::pos_type pos_type;
    typedef typename traits_type::off_type off_type;

    ostrstream();
    ostrstream(char *s, int n,
               ios_base::openmode = ios_base::out);
    
    virtual ~ostrstream();

    strstreambuf *rdbuf() const;
    void freeze(int freezefl = 1);
    char *str();
    int pcount() const;

  };
}
</PRE></UL>
<A NAME="sec6"><H3>Member Types</H3></A>

<A NAME="idx1079"></A><PRE><B>char_type</B></PRE>
<UL>
<P>The type <SAMP>char_type</SAMP> is a synonym of type <SAMP>char</SAMP>.</P>
</UL>


<A NAME="idx1080"></A><PRE><B>int_type</B></PRE>
<UL>
<P>The type<SAMP> int_type</SAMP> is a synonym of type <SAMP>traits_type::in_type</SAMP>.</P>
</UL>


<A NAME="idx1081"></A><PRE><B>off_type</B></PRE>
<UL>
<P>The type <SAMP>off_type</SAMP> is a synonym of type <SAMP>traits_type::off_type</SAMP>.</P>
</UL>


<A NAME="idx1082"></A><PRE><B>pos_type</B></PRE>
<UL>
<P>The type <SAMP>pos_type</SAMP> is a synonym of type <SAMP>traits_type::pos_type</SAMP>.</P>
</UL>


<A NAME="idx1083"></A><PRE><B>traits_type</B></PRE>
<UL>
<P>The type <SAMP>traits_type</SAMP> is a synonym of type <SAMP>char_traits&lt;char&gt;</SAMP>.</P>
</UL>

<A NAME="sec7"><H3>Constructors</H3></A>

<A NAME="idx1084"></A><PRE><B>ostrstream</B>();</PRE>
<UL>
<P>Constructs an object of class <B><I>ostrstream</I></B>, initializing the base class <B><I><A HREF="basic-ostream.html">basic_ostream</A></I></B> with the associated <B><I><A HREF="strstreambuf.html">strstreambuf</A></I></B> object. The <B><I>strstreambuf</I></B> object is initialized by calling its default constructor <SAMP>strstreambuf()</SAMP>.</P>
</UL>


<A NAME="idx1085"></A><PRE><B>ostrstream</B>(char* s, int n, ios_base::openmode
           mode = ios_base::out); </PRE>
<UL>
<P>Constructs an object of class <B><I>ostrstream</I></B>, initializing the base class <B><I><A HREF="basic-ostream.html">basic_ostream</A></I></B> with the associated <B><I><A HREF="strstreambuf.html">strstreambuf</A></I></B> object. The <B><I>strstreambuf</I></B> object is initialized by calling one of two constructors:</P>
<UL>
<LI><P CLASS="LIST">If <SAMP>mode &amp; app == 0</SAMP>, it calls <SAMP>strstreambuf(s,n,s)</SAMP></P></LI>
<LI><P CLASS="LIST">Otherwise it calls <SAMP>strstreambuf(s,n,s + ::strlen(s))</SAMP></P></LI>
</UL>
</UL>

<A NAME="sec8"><H3>Destructors</H3></A>

<A NAME="idx1086"></A><PRE>virtual <B>~ostrstream</B>();</PRE>
<UL>
<P>Destroys an object of class <B><I>ostrstream</I></B>. </P>
</UL>

<A NAME="sec9"><H3>Member Functions</H3></A>

<A NAME="idx1087"></A><PRE>void 
<B>freeze</B>(bool freezefl = true); </PRE>
<UL>
<P>Calls <SAMP>rdbuf()-&gt;freeze(freezefl)</SAMP>.</P>
</UL>


<A NAME="idx1088"></A><PRE>int 
<B>pcount</B>() const; </PRE>
<UL>
<P>Returns <SAMP>rdbuf()-&gt;pcount()</SAMP>.</P>
</UL>


<A NAME="idx1089"></A><PRE>strstreambuf* 
<B>rdbuf</B>() const; </PRE>
<UL>
<P>Returns a pointer to the private <B><I><A HREF="strstreambuf.html">strstreambuf</A></I></B> object associated with the stream.</P>
</UL>


<A NAME="idx1090"></A><PRE>char* 
<B>str</B>();</PRE>
<UL>
<P>Returns <SAMP>rdbuf()-&gt;str()</SAMP>.</P>
</UL>

<A NAME="sec10"><H3>Example</H3></A>
<P>See examples for <B><I><A HREF="strstream.html">strstream</A></I></B>, <B><I><A HREF="istrstream.html">istrstream</A></I></B>, and <B><I><A HREF="strstreambuf.html">strstreambuf</A></I></B>.</P>
<A NAME="sec11"><H3>See Also</H3></A>
<P><B><I><A HREF="char-traits.html">char_traits</A></I></B>, <B><I><A HREF="ios-base.html">ios_base</A></I></B>, <B><I><A HREF="basic-ios.html">basic_ios</A></I></B>, <B><I><A HREF="strstreambuf.html">strstreambuf</A></I></B>, <B><I><A HREF="istrstream.html">istrstream</A></I></B>, <B><I><A HREF="strstream.html">strstream</A></I></B></P>
<A NAME="sec12"><H3>Standards Conformance</H3></A>
<P><I>Deprecated.  See ISO/IEC 14882:1998 -- International Standard for Information Systems --Programming Language C++,</I> Annex D Compatibility features Section D.7.3</P>

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