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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="SECTION005220000000000000000">List Elements</A></H2>
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The definitions of the member functions of the <tt>ListElement<T></tt>
class are given in Program <A HREF="#proglinklist0h"><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>.
Altogether, there are three functions--a constructor and two accessors.
<P>
<P><A NAME="3818"> </A><A NAME="proglinklist0c"> </A> <IMG WIDTH=575 HEIGHT=257 ALIGN=BOTTOM ALT="program3520" SRC="img620.gif" tppabs="http://dictator.uwaterloo.ca/Bruno.Preiss/books/opus4/html/img620.gif" ><BR>
<STRONG>Program:</STRONG> <tt>ListElement<T></tt> Class Member Function Definitions<BR>
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The constructor simply initializes the member variable to the passed values.
The running time of the constructor is <IMG WIDTH=124 HEIGHT=26 ALIGN=MIDDLE ALT="tex2html_wrap_inline61025" SRC="img621.gif" tppabs="http://dictator.uwaterloo.ca/Bruno.Preiss/books/opus4/html/img621.gif" >,
where <IMG WIDTH=72 HEIGHT=26 ALIGN=MIDDLE ALT="tex2html_wrap_inline60965" SRC="img599.gif" tppabs="http://dictator.uwaterloo.ca/Bruno.Preiss/books/opus4/html/img599.gif" > is the running time of the copy constructor for
objects of class <tt>T</tt>.
Assigning a value to the <tt>next</tt> field takes a constant amount of time.
<P>
The two accessor functions, <tt>Datum</tt> and <tt>Next</tt>,
simply return the values of the corresponding member variables.
Clearly, the running times of each of these functions is <I>O</I>(1).
Note that if <tt>Datum</tt> had been defined as returning a <tt>T</tt>,
rather than a <em>reference</em> to <tt>T</tt>,
the assumption of constant running time would not be valid.
<P>
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