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<b>Data Structures and Algorithms 
with Object-Oriented Design Patterns in C++</b><br>
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<H3><A NAME="SECTION006262000000000000000"><tt>Container</tt> Class Default <tt>Put</tt> Member Function</A></H3>
<P>
Program&nbsp;<A HREF="page120.html#progcontainer2c" tppabs="http://dictator.uwaterloo.ca/Bruno.Preiss/books/opus4/html/page120.html#progcontainer2c"><IMG  ALIGN=BOTTOM ALT="gif" SRC="cross_ref_motif.gif" tppabs="http://dictator.uwaterloo.ca/Bruno.Preiss/books/opus4/icons/cross_ref_motif.gif"></A> gives the definition of the
default <tt>Put</tt> function for containers.
Recall that the <tt>Put</tt> function is a virtual function
inherited by the <tt>Container</tt> class from the 
abstract base class <tt>Object</tt>.
<P>
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<STRONG>Program:</STRONG> <tt>Container</tt> Class <tt>Put</tt> Function Definition<BR>
<P>
<P>
A default <tt>Put</tt> function is provided to
simplify the implementation of classes derived
from the <tt>Container</tt> class.
The default behavior is to print out the name of the class
and then to print each of the elements in the container,
by using the <tt>Accept</tt> member function
with the visitor <tt>PuttingVisitor</tt>.
<P>
This implementation makes us of
<em>run-time type information</em><A NAME=5024>&#160;</A>
to determine the name of the class.
The C++ operator <tt>typeid</tt><A NAME=5026>&#160;</A>
returns a reference to an instance of
the <tt>typeinfo</tt> class
which is defined in the standard header file
<tt>typeinfo.h</tt><A NAME=5029>&#160;</A>.
This class has member function, <tt>name()</tt><A NAME=5031>&#160;</A>,
which returns a pointer to a character string
that contains the name of the class.
<P>
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