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<TITLE>Default Constructor</TITLE>
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<b>Data Structures and Algorithms
with Object-Oriented Design Patterns in C++</b><br>
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<H2><A NAME="SECTION005110000000000000000">Default Constructor</A></H2>
<P>
The <em>default constructor</em>
<A NAME=2656> </A><A NAME=2657> </A>
for an object of class <tt>T</tt> is the function <tt>T::T()</tt>.
I.e., it is the constructor which takes no arguments.
The definition of the <tt>Array<T></tt> default destructor
is given in Program <A HREF="page81.html#progarray1c" tppabs="http://dictator.uwaterloo.ca/Bruno.Preiss/books/opus4/html/page81.html#progarray1c"><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>.
The default constructor allocates a zero-length array
of elements of type <tt>T</tt>
and sets the fields <tt>base</tt> and <tt>length</tt> to zero.
Clearly, the running time of this routine is <I>O</I>(1).
<P>
<P><A NAME="2867"> </A><A NAME="progarray1c"> </A> <IMG WIDTH=575 HEIGHT=123 ALIGN=BOTTOM ALT="program2665" SRC="img591.gif" tppabs="http://dictator.uwaterloo.ca/Bruno.Preiss/books/opus4/html/img591.gif" ><BR>
<STRONG>Program:</STRONG> <tt>Array<T></tt> Class Default Constructor Definition<BR>
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