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<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="GENERATOR" content="GNU source-highlight
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite">
<title>ListTest.cpp</title>
</head>
<body style="background-color:white">
<pre><i><span style="color:#9A1900">// Modified: 8/30/2006: mc2zk</span></i>
<i><span style="color:#9A1900">// CS216 Lab 1 - Test Harness</span></i>
<i><span style="color:#9A1900">// by Michael Crane</span></i>
<i><span style="color:#9A1900">//</span></i>
<i><span style="color:#9A1900">// Integrate this test harness with your List implementation to</span></i>
<i><span style="color:#9A1900">// thoroughly test your design. I have only used functions that were</span></i>
<i><span style="color:#9A1900">// explicitly defined in the specification, with one exception:</span></i>
<i><span style="color:#9A1900">//</span></i>
<i><span style="color:#9A1900">// I have assumed a global print function whose prototype is</span></i>
<i><span style="color:#9A1900">// void printList(List l, bool forward);</span></i>
<i><span style="color:#9A1900">//</span></i>
<i><span style="color:#9A1900">// If the 'forward' parameter is true,</span></i>
<i><span style="color:#9A1900">// the list is printed in forward order</span></i>
<i><span style="color:#9A1900">// if the 'forward' parameter is false,</span></i>
<i><span style="color:#9A1900">// the list is printed in reverse order</span></i>
<b><span style="color:#000080">#include</span></b> <span style="color:#FF0000"><iostream></span>
<b><span style="color:#000080">#include</span></b> <span style="color:#FF0000"><string></span>
<b><span style="color:#000080">#include</span></b> <span style="color:#FF0000"><cctype></span>
<b><span style="color:#0000FF">using</span></b> <b><span style="color:#0000FF">namespace</span></b> std<span style="color:#990000">;</span>
<b><span style="color:#000080">#include</span></b> <span style="color:#FF0000">"List.h"</span>
<b><span style="color:#000080">#include</span></b> <span style="color:#FF0000">"ListItr.h"</span>
<span style="color:#009900">int</span> <b><span style="color:#000000">menu</span></b> <span style="color:#990000">(</span><span style="color:#008080">string</span> option<span style="color:#990000">[],</span> <span style="color:#009900">int</span> n_opt<span style="color:#990000">);</span>
<i><span style="color:#9A1900">//set up menu options</span></i>
<span style="color:#008080">string</span> option<span style="color:#990000">[]</span> <span style="color:#990000">=</span> <span style="color:#FF0000">{</span>
<span style="color:#FF0000">"Quit"</span><span style="color:#990000">,</span>
<span style="color:#FF0000">"New List"</span><span style="color:#990000">,</span>
<span style="color:#FF0000">"Show List elements"</span><span style="color:#990000">,</span>
<span style="color:#FF0000">"Set ListItr with first()"</span><span style="color:#990000">,</span>
<span style="color:#FF0000">"Set ListItr with find()"</span><span style="color:#990000">,</span>
<span style="color:#FF0000">"Set ListItr with last()"</span><span style="color:#990000">,</span>
<span style="color:#FF0000">"Move ListItr forward"</span><span style="color:#990000">,</span>
<span style="color:#FF0000">"Move ListItr backward"</span><span style="color:#990000">,</span>
<span style="color:#FF0000">"Retrieve element at ListItr"</span><span style="color:#990000">,</span>
<span style="color:#FF0000">"Insert element before"</span><span style="color:#990000">,</span>
<span style="color:#FF0000">"Insert element after"</span><span style="color:#990000">,</span>
<span style="color:#FF0000">"Insert element at tail"</span><span style="color:#990000">,</span>
<span style="color:#FF0000">"Remove element"</span><span style="color:#990000">,</span>
<span style="color:#FF0000">"Cardinality (size)"</span><span style="color:#990000">,</span>
<span style="color:#FF0000">"Copy list w/copy constructor"</span><span style="color:#990000">,</span>
<span style="color:#FF0000">"Copy list with operator="</span><span style="color:#990000">,</span>
<span style="color:#FF0000">"Make list empty"</span><span style="color:#990000">,</span>
<span style="color:#FF0000">}</span><span style="color:#990000">;</span>
<span style="color:#009900">int</span> <b><span style="color:#0000FF">const</span></b> n_choice <span style="color:#990000">=</span> <span style="color:#993399">17</span><span style="color:#990000">;</span>
<i><span style="color:#9A1900">/*</span></i>
<i><span style="color:#9A1900"> * This main driver program interactively exercises a</span></i>
<i><span style="color:#9A1900"> * list package.</span></i>
<i><span style="color:#9A1900"> * It assumes a linked list implementation, and its real</span></i>
<i><span style="color:#9A1900"> * purpose is to exercise the underlying list manipulation</span></i>
<i><span style="color:#9A1900"> * procedures.</span></i>
<i><span style="color:#9A1900"> * It uses a menu to accept commands from the terminal,</span></i>
<i><span style="color:#9A1900"> * then performs the indicated command.</span></i>
<i><span style="color:#9A1900"> */</span></i>
<span style="color:#009900">int</span> <b><span style="color:#000000">main</span></b> <span style="color:#990000">()</span> <span style="color:#FF0000">{</span>
<span style="color:#009900">int</span> command<span style="color:#990000">;</span>
<span style="color:#008080">string</span> response<span style="color:#990000">;</span>
<span style="color:#008080">List</span> <span style="color:#990000">*</span>list <span style="color:#990000">=</span> NULL<span style="color:#990000">;</span>
<span style="color:#008080">ListItr</span> <span style="color:#990000">*</span>itr <span style="color:#990000">=</span> NULL<span style="color:#990000">;</span>
<i><span style="color:#9A1900">// Initialize this run</span></i>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"--------------------------------------------------"</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">This test harness operates with one List"</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">object and one ListItr object."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Use the menu options to manipulate these"</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">objects."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">while</span></b> <span style="color:#990000">(</span><b><span style="color:#0000FF">true</span></b><span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
command <span style="color:#990000">=</span> <b><span style="color:#000000">menu</span></b><span style="color:#990000">(</span>option<span style="color:#990000">,</span> n_choice<span style="color:#990000">);</span>
<b><span style="color:#0000FF">switch</span></b> <span style="color:#990000">(</span>command<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
<i><span style="color:#9A1900">// Quit</span></i>
<b><span style="color:#0000FF">case</span></b> <span style="color:#993399">1</span><span style="color:#990000">:</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Do you really want to quit? (y/n) > "</span><span style="color:#990000">;</span>
cin <span style="color:#990000">>></span> response<span style="color:#990000">;</span>
<i><span style="color:#9A1900">// Exit normally</span></i>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>response<span style="color:#990000">[</span><span style="color:#993399">0</span><span style="color:#990000">]</span> <span style="color:#990000">==</span> <span style="color:#FF0000">'y'</span> <span style="color:#990000">||</span> response<span style="color:#990000">[</span><span style="color:#993399">0</span><span style="color:#990000">]</span> <span style="color:#990000">==</span> <span style="color:#FF0000">'Y'</span><span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>list <span style="color:#990000">!=</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
<b><span style="color:#0000FF">delete</span></b> list<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>itr <span style="color:#990000">!=</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
<b><span style="color:#0000FF">delete</span></b> itr<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
<b><span style="color:#0000FF">return</span></b> <span style="color:#993399">0</span><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<i><span style="color:#9A1900">// New list</span></i>
<b><span style="color:#0000FF">case</span></b> <span style="color:#993399">2</span><span style="color:#990000">:</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>list <span style="color:#990000">!=</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
<b><span style="color:#0000FF">delete</span></b> list<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
list <span style="color:#990000">=</span> <b><span style="color:#0000FF">new</span></b> <b><span style="color:#000000">List</span></b><span style="color:#990000">();</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">You have created an empty list"</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Do you want to initialize it with elements? (y/n) > "</span><span style="color:#990000">;</span>
cin <span style="color:#990000">>></span> response<span style="color:#990000">;</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>response<span style="color:#990000">[</span><span style="color:#993399">0</span><span style="color:#990000">]</span> <span style="color:#990000">!=</span> <span style="color:#FF0000">'y'</span> <span style="color:#990000">&&</span> response<span style="color:#990000">[</span><span style="color:#993399">0</span><span style="color:#990000">]</span> <span style="color:#990000">!=</span> <span style="color:#FF0000">'Y'</span><span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
<i><span style="color:#9A1900">// accept elements</span></i>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t\t</span><span style="color:#FF0000">Enter elements one by one as integers."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t\t</span><span style="color:#FF0000">Any non-numeric character, e.g. #, will terminate input"</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Enter first element: "</span><span style="color:#990000">;</span>
cin <span style="color:#990000">>></span> response<span style="color:#990000">;</span>
<b><span style="color:#0000FF">while</span></b> <span style="color:#990000">(</span><b><span style="color:#000000">isdigit</span></b><span style="color:#990000">(</span>response<span style="color:#990000">[</span><span style="color:#993399">0</span><span style="color:#990000">]))</span> <span style="color:#FF0000">{</span>
<span style="color:#009900">int</span> element <span style="color:#990000">=</span> <b><span style="color:#000000">atoi</span></b><span style="color:#990000">(</span>response<span style="color:#990000">.</span><b><span style="color:#000000">c_str</span></b><span style="color:#990000">());</span>
list<span style="color:#990000">-></span><b><span style="color:#000000">insertAtTail</span></b><span style="color:#990000">(</span>element<span style="color:#990000">);</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Enter next element: "</span><span style="color:#990000">;</span>
cin <span style="color:#990000">>></span> response<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"The elements in forward order: "</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#000000">printList</span></b><span style="color:#990000">(*</span>list<span style="color:#990000">,</span> <b><span style="color:#0000FF">true</span></b><span style="color:#990000">);</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<i><span style="color:#9A1900">// Show elements</span></i>
<b><span style="color:#0000FF">case</span></b> <span style="color:#993399">3</span><span style="color:#990000">:</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>list <span style="color:#990000">==</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Create a List first."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Print the list forwards or backwards? (f/b) > "</span><span style="color:#990000">;</span>
cin <span style="color:#990000">>></span> response<span style="color:#990000">;</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>response<span style="color:#990000">[</span><span style="color:#993399">0</span><span style="color:#990000">]</span> <span style="color:#990000">==</span> <span style="color:#FF0000">'b'</span> <span style="color:#990000">||</span> response<span style="color:#990000">[</span><span style="color:#993399">0</span><span style="color:#990000">]</span> <span style="color:#990000">==</span> <span style="color:#FF0000">'B'</span><span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"The elements in reverse order:"</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#000000">printList</span></b><span style="color:#990000">(*</span>list<span style="color:#990000">,</span> <b><span style="color:#0000FF">false</span></b><span style="color:#990000">);</span>
<span style="color:#FF0000">}</span> <b><span style="color:#0000FF">else</span></b> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"The elements in forward order:"</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#000000">printList</span></b><span style="color:#990000">(*</span>list<span style="color:#990000">,</span> <b><span style="color:#0000FF">true</span></b><span style="color:#990000">);</span>
<span style="color:#FF0000">}</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<i><span style="color:#9A1900">// first()</span></i>
<b><span style="color:#0000FF">case</span></b> <span style="color:#993399">4</span><span style="color:#990000">:</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>list <span style="color:#990000">==</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Create a List first."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Setting the ListItr to the first element..."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>itr <span style="color:#990000">!=</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
<b><span style="color:#0000FF">delete</span></b> itr<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
itr <span style="color:#990000">=</span> <b><span style="color:#0000FF">new</span></b> <b><span style="color:#000000">ListItr</span></b><span style="color:#990000">(</span>list<span style="color:#990000">-></span><b><span style="color:#000000">first</span></b><span style="color:#990000">());</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<i><span style="color:#9A1900">// find()</span></i>
<b><span style="color:#0000FF">case</span></b> <span style="color:#993399">5</span><span style="color:#990000">:</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>list <span style="color:#990000">==</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Create a List first."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Enter element to find: "</span><span style="color:#990000">;</span>
cin <span style="color:#990000">>></span> response<span style="color:#990000">;</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span><b><span style="color:#000000">isdigit</span></b><span style="color:#990000">(</span>response<span style="color:#990000">[</span><span style="color:#993399">0</span><span style="color:#990000">]))</span> <span style="color:#FF0000">{</span>
<span style="color:#009900">int</span> element <span style="color:#990000">=</span> <b><span style="color:#000000">atoi</span></b><span style="color:#990000">(</span>response<span style="color:#990000">.</span><b><span style="color:#000000">c_str</span></b><span style="color:#990000">());</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Setting the ListItr to find("</span> <span style="color:#990000"><<</span> element <span style="color:#990000"><<</span> <span style="color:#FF0000">")..."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>itr <span style="color:#990000">!=</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
<b><span style="color:#0000FF">delete</span></b> itr<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
itr <span style="color:#990000">=</span> <b><span style="color:#0000FF">new</span></b> <b><span style="color:#000000">ListItr</span></b><span style="color:#990000">(</span>list<span style="color:#990000">-></span><b><span style="color:#000000">find</span></b><span style="color:#990000">(</span>element<span style="color:#990000">));</span>
<span style="color:#FF0000">}</span> <b><span style="color:#0000FF">else</span></b> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Please enter an integer."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<i><span style="color:#9A1900">// last()</span></i>
<b><span style="color:#0000FF">case</span></b> <span style="color:#993399">6</span><span style="color:#990000">:</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>list <span style="color:#990000">==</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Create a List first."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Setting the ListItr to the last element..."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>itr <span style="color:#990000">!=</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
<b><span style="color:#0000FF">delete</span></b> itr<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
itr <span style="color:#990000">=</span> <b><span style="color:#0000FF">new</span></b> <b><span style="color:#000000">ListItr</span></b><span style="color:#990000">(</span>list<span style="color:#990000">-></span><b><span style="color:#000000">last</span></b><span style="color:#990000">());</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<i><span style="color:#9A1900">// moveForwards()</span></i>
<b><span style="color:#0000FF">case</span></b> <span style="color:#993399">7</span><span style="color:#990000">:</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>itr <span style="color:#990000">==</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Create a ListItr first."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Moving the ListItr forwards..."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
itr<span style="color:#990000">-></span><b><span style="color:#000000">moveForward</span></b><span style="color:#990000">();</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<i><span style="color:#9A1900">// moveBackwards()</span></i>
<b><span style="color:#0000FF">case</span></b> <span style="color:#993399">8</span><span style="color:#990000">:</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>itr <span style="color:#990000">==</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Create a ListItr first."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Moving the ListItr backwards..."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
itr<span style="color:#990000">-></span><b><span style="color:#000000">moveBackward</span></b><span style="color:#990000">();</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<i><span style="color:#9A1900">// retrieve()</span></i>
<b><span style="color:#0000FF">case</span></b> <span style="color:#993399">9</span><span style="color:#990000">:</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>itr <span style="color:#990000">==</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Create a ListItr first."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>itr<span style="color:#990000">-></span><b><span style="color:#000000">isPastBeginning</span></b><span style="color:#990000">())</span> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">The ListItr is past the beginning."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span> <b><span style="color:#0000FF">else</span></b> <b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>itr<span style="color:#990000">-></span><b><span style="color:#000000">isPastEnd</span></b><span style="color:#990000">())</span> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">The ListItr is past the end."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span> <b><span style="color:#0000FF">else</span></b> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Element retrieved: "</span> <span style="color:#990000"><<</span> itr<span style="color:#990000">-></span><b><span style="color:#000000">retrieve</span></b><span style="color:#990000">()</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<i><span style="color:#9A1900">// insertBefore()</span></i>
<b><span style="color:#0000FF">case</span></b> <span style="color:#993399">10</span><span style="color:#990000">:</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>list <span style="color:#990000">==</span> NULL <span style="color:#990000">||</span> itr <span style="color:#990000">==</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Create a List and ListItr first."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Enter element to insert: "</span><span style="color:#990000">;</span>
cin <span style="color:#990000">>></span> response<span style="color:#990000">;</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span><b><span style="color:#000000">isdigit</span></b><span style="color:#990000">(</span>response<span style="color:#990000">[</span><span style="color:#993399">0</span><span style="color:#990000">]))</span> <span style="color:#FF0000">{</span>
<span style="color:#009900">int</span> element <span style="color:#990000">=</span> <b><span style="color:#000000">atoi</span></b><span style="color:#990000">(</span>response<span style="color:#990000">.</span><b><span style="color:#000000">c_str</span></b><span style="color:#990000">());</span>
list<span style="color:#990000">-></span><b><span style="color:#000000">insertBefore</span></b><span style="color:#990000">(</span>element<span style="color:#990000">,</span> <span style="color:#990000">*</span>itr<span style="color:#990000">);</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Inserting "</span> <span style="color:#990000"><<</span> element <span style="color:#990000"><<</span> <span style="color:#FF0000">" before the current ListItr"</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span> <b><span style="color:#0000FF">else</span></b> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Please enter an integer."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"The elements in forward order: "</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#000000">printList</span></b><span style="color:#990000">(*</span>list<span style="color:#990000">,</span> <b><span style="color:#0000FF">true</span></b><span style="color:#990000">);</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<i><span style="color:#9A1900">// insertAfter()</span></i>
<b><span style="color:#0000FF">case</span></b> <span style="color:#993399">11</span><span style="color:#990000">:</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>list <span style="color:#990000">==</span> NULL <span style="color:#990000">||</span> itr <span style="color:#990000">==</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Create a List and ListItr first."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Enter element to insert: "</span><span style="color:#990000">;</span>
cin <span style="color:#990000">>></span> response<span style="color:#990000">;</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span><b><span style="color:#000000">isdigit</span></b><span style="color:#990000">(</span>response<span style="color:#990000">[</span><span style="color:#993399">0</span><span style="color:#990000">]))</span> <span style="color:#FF0000">{</span>
<span style="color:#009900">int</span> element <span style="color:#990000">=</span> <b><span style="color:#000000">atoi</span></b><span style="color:#990000">(</span>response<span style="color:#990000">.</span><b><span style="color:#000000">c_str</span></b><span style="color:#990000">());</span>
list<span style="color:#990000">-></span><b><span style="color:#000000">insertAfter</span></b><span style="color:#990000">(</span>element<span style="color:#990000">,</span> <span style="color:#990000">*</span>itr<span style="color:#990000">);</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Inserting "</span> <span style="color:#990000"><<</span> element <span style="color:#990000"><<</span> <span style="color:#FF0000">" after the current ListItr"</span> <span style="color:#990000"><<</span>endl<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span> <b><span style="color:#0000FF">else</span></b> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Please enter an integer."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"The elements in forward order: "</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#000000">printList</span></b><span style="color:#990000">(*</span>list<span style="color:#990000">,</span> <b><span style="color:#0000FF">true</span></b><span style="color:#990000">);</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<i><span style="color:#9A1900">// insertAtTail()</span></i>
<b><span style="color:#0000FF">case</span></b> <span style="color:#993399">12</span><span style="color:#990000">:</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>list <span style="color:#990000">==</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Create a List first."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Enter element to insert: "</span><span style="color:#990000">;</span>
cin <span style="color:#990000">>></span> response<span style="color:#990000">;</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span><b><span style="color:#000000">isdigit</span></b><span style="color:#990000">(</span>response<span style="color:#990000">[</span><span style="color:#993399">0</span><span style="color:#990000">]))</span> <span style="color:#FF0000">{</span>
<span style="color:#009900">int</span> element <span style="color:#990000">=</span> <b><span style="color:#000000">atoi</span></b><span style="color:#990000">(</span>response<span style="color:#990000">.</span><b><span style="color:#000000">c_str</span></b><span style="color:#990000">());</span>
list<span style="color:#990000">-></span><b><span style="color:#000000">insertAtTail</span></b><span style="color:#990000">(</span>element<span style="color:#990000">);</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Inserting "</span> <span style="color:#990000"><<</span> element <span style="color:#990000"><<</span> <span style="color:#FF0000">" at the tail of the list"</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span> <b><span style="color:#0000FF">else</span></b> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Please enter an integer."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"The elements in forward order: "</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#000000">printList</span></b><span style="color:#990000">(*</span>list<span style="color:#990000">,</span> <b><span style="color:#0000FF">true</span></b><span style="color:#990000">);</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<i><span style="color:#9A1900">// remove()</span></i>
<b><span style="color:#0000FF">case</span></b> <span style="color:#993399">13</span><span style="color:#990000">:</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>list <span style="color:#990000">==</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Create a List first."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Enter element to remove: "</span><span style="color:#990000">;</span>
cin <span style="color:#990000">>></span> response<span style="color:#990000">;</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span><b><span style="color:#000000">isdigit</span></b><span style="color:#990000">(</span>response<span style="color:#990000">[</span><span style="color:#993399">0</span><span style="color:#990000">]))</span> <span style="color:#FF0000">{</span>
<span style="color:#009900">int</span> element <span style="color:#990000">=</span> <b><span style="color:#000000">atoi</span></b><span style="color:#990000">(</span>response<span style="color:#990000">.</span><b><span style="color:#000000">c_str</span></b><span style="color:#990000">());</span>
list<span style="color:#990000">-></span><b><span style="color:#000000">remove</span></b><span style="color:#990000">(</span>element<span style="color:#990000">);</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Removing "</span> <span style="color:#990000"><<</span> element <span style="color:#990000"><<</span> <span style="color:#FF0000">" from list"</span> <span style="color:#990000"><<</span>endl<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span> <b><span style="color:#0000FF">else</span></b> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Please enter an integer."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"The elements in forward order: "</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#000000">printList</span></b><span style="color:#990000">(*</span>list<span style="color:#990000">,</span> <b><span style="color:#0000FF">true</span></b><span style="color:#990000">);</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<i><span style="color:#9A1900">// size()</span></i>
<b><span style="color:#0000FF">case</span></b> <span style="color:#993399">14</span><span style="color:#990000">:</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>list <span style="color:#990000">==</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Create a List first."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Size of list: "</span> <span style="color:#990000"><<</span> list<span style="color:#990000">-></span><b><span style="color:#000000">size</span></b><span style="color:#990000">()</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<i><span style="color:#9A1900">// Copy constructor</span></i>
<b><span style="color:#0000FF">case</span></b> <span style="color:#993399">15</span><span style="color:#990000">:</span> <span style="color:#FF0000">{</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>list <span style="color:#990000">==</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Create a List first."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
List<span style="color:#990000">*</span> old_list <span style="color:#990000">=</span> list<span style="color:#990000">;</span>
list <span style="color:#990000">=</span> <b><span style="color:#0000FF">new</span></b> <b><span style="color:#000000">List</span></b><span style="color:#990000">(*</span>old_list<span style="color:#990000">);</span>
old_list<span style="color:#990000">-></span><b><span style="color:#000000">makeEmpty</span></b><span style="color:#990000">();</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"The new list is (forward): "</span><span style="color:#990000">;</span>
<b><span style="color:#000000">printList</span></b><span style="color:#990000">(*</span>list<span style="color:#990000">,</span> <b><span style="color:#0000FF">true</span></b><span style="color:#990000">);</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"The new list is (backward): "</span><span style="color:#990000">;</span>
<b><span style="color:#000000">printList</span></b><span style="color:#990000">(*</span>list<span style="color:#990000">,</span> <b><span style="color:#0000FF">false</span></b><span style="color:#990000">);</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"The old list was made empty (forward): "</span><span style="color:#990000">;</span>
<b><span style="color:#000000">printList</span></b><span style="color:#990000">(*</span>old_list<span style="color:#990000">,</span> <b><span style="color:#0000FF">true</span></b><span style="color:#990000">);</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"The old list was made empty (backward): "</span><span style="color:#990000">;</span>
<b><span style="color:#000000">printList</span></b><span style="color:#990000">(*</span>old_list<span style="color:#990000">,</span> <b><span style="color:#0000FF">false</span></b><span style="color:#990000">);</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"The old list should be destroyed now."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">delete</span></b> old_list<span style="color:#990000">;</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>itr <span style="color:#990000">!=</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
<b><span style="color:#0000FF">delete</span></b> itr<span style="color:#990000">;</span>
itr <span style="color:#990000">=</span> NULL<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
<i><span style="color:#9A1900">// operator=</span></i>
<b><span style="color:#0000FF">case</span></b> <span style="color:#993399">16</span><span style="color:#990000">:</span> <span style="color:#FF0000">{</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>list <span style="color:#990000">==</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Create a List first."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
List<span style="color:#990000">*</span> old_list <span style="color:#990000">=</span> list<span style="color:#990000">;</span>
list <span style="color:#990000">=</span> <b><span style="color:#0000FF">new</span></b> <b><span style="color:#000000">List</span></b><span style="color:#990000">();</span>
<span style="color:#990000">*</span>list <span style="color:#990000">=</span> <span style="color:#990000">*</span>old_list<span style="color:#990000">;</span>
old_list<span style="color:#990000">-></span><b><span style="color:#000000">makeEmpty</span></b><span style="color:#990000">();</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"The new list is (forward): "</span><span style="color:#990000">;</span>
<b><span style="color:#000000">printList</span></b><span style="color:#990000">(*</span>list<span style="color:#990000">,</span> <b><span style="color:#0000FF">true</span></b><span style="color:#990000">);</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"The new list is (backward): "</span><span style="color:#990000">;</span>
<b><span style="color:#000000">printList</span></b><span style="color:#990000">(*</span>list<span style="color:#990000">,</span> <b><span style="color:#0000FF">false</span></b><span style="color:#990000">);</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"The old list was made empty (forward): "</span><span style="color:#990000">;</span>
<b><span style="color:#000000">printList</span></b><span style="color:#990000">(*</span>old_list<span style="color:#990000">,</span> <b><span style="color:#0000FF">true</span></b><span style="color:#990000">);</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"The old list was made empty (backward): "</span><span style="color:#990000">;</span>
<b><span style="color:#000000">printList</span></b><span style="color:#990000">(*</span>old_list<span style="color:#990000">,</span> <b><span style="color:#0000FF">false</span></b><span style="color:#990000">);</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"The old list should be destroyed now."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">delete</span></b> old_list<span style="color:#990000">;</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>itr <span style="color:#990000">!=</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
<b><span style="color:#0000FF">delete</span></b> itr<span style="color:#990000">;</span>
itr <span style="color:#990000">=</span> NULL<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
<i><span style="color:#9A1900">// makeEmpty()</span></i>
<b><span style="color:#0000FF">case</span></b> <span style="color:#993399">17</span><span style="color:#990000">:</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>list <span style="color:#990000">==</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Create a List first."</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">break</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"The list is (forward): "</span><span style="color:#990000">;</span>
<b><span style="color:#000000">printList</span></b><span style="color:#990000">(*</span>list<span style="color:#990000">,</span> <b><span style="color:#0000FF">true</span></b><span style="color:#990000">);</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"The list is (backward): "</span><span style="color:#990000">;</span>
<b><span style="color:#000000">printList</span></b><span style="color:#990000">(*</span>list<span style="color:#990000">,</span> <b><span style="color:#0000FF">false</span></b><span style="color:#990000">);</span>
list<span style="color:#990000">-></span><b><span style="color:#000000">makeEmpty</span></b><span style="color:#990000">();</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>itr <span style="color:#990000">!=</span> NULL<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
<b><span style="color:#0000FF">delete</span></b> itr<span style="color:#990000">;</span>
itr <span style="color:#990000">=</span> NULL<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"The list was made empty (forward): "</span><span style="color:#990000">;</span>
<b><span style="color:#000000">printList</span></b><span style="color:#990000">(*</span>list<span style="color:#990000">,</span> <b><span style="color:#0000FF">true</span></b><span style="color:#990000">);</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"The list was made empty (backward): "</span><span style="color:#990000">;</span>
<b><span style="color:#000000">printList</span></b><span style="color:#990000">(*</span>list<span style="color:#990000">,</span> <b><span style="color:#0000FF">false</span></b><span style="color:#990000">);</span>
<span style="color:#FF0000">}</span>
<span style="color:#FF0000">}</span>
<span style="color:#FF0000">}</span>
<i><span style="color:#9A1900">/*</span></i>
<i><span style="color:#9A1900"> * This simple routine takes an array of 'n_opt' options</span></i>
<i><span style="color:#9A1900"> * (pointers to strings, describing the 'option')</span></i>
<i><span style="color:#9A1900"> * displays these options on the screen,</span></i>
<i><span style="color:#9A1900"> * and requests a choice on the part of the user</span></i>
<i><span style="color:#9A1900"> * It returns the integer number (position in the list)</span></i>
<i><span style="color:#9A1900"> * of the chosen option.</span></i>
<i><span style="color:#9A1900"> *</span></i>
<i><span style="color:#9A1900"> * NOTE, all input and output uses 'stdin' and 'stdout'</span></i>
<i><span style="color:#9A1900">*/</span></i>
<span style="color:#009900">int</span> <b><span style="color:#000000">menu</span></b> <span style="color:#990000">(</span><span style="color:#008080">string</span> option<span style="color:#990000">[],</span> <span style="color:#009900">int</span> n_opt<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
<span style="color:#009900">int</span> choice<span style="color:#990000">,</span> i<span style="color:#990000">;</span>
<span style="color:#008080">string</span> input<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">" - - - - - - MENU - - - - - -"</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">for</span></b> <span style="color:#990000">(</span>i <span style="color:#990000">=</span> <span style="color:#993399">0</span><span style="color:#990000">;</span> i <span style="color:#990000"><</span> n_opt<span style="color:#990000">;</span> i<span style="color:#990000">++)</span> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">"</span> <span style="color:#990000"><<</span> i <span style="color:#990000">+</span> <span style="color:#993399">1</span> <span style="color:#990000"><<</span> <span style="color:#FF0000">" - "</span> <span style="color:#990000"><<</span> option<span style="color:#990000">[</span>i<span style="color:#990000">]</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
cout <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">" - - - - - - - - - - - - - - -"</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">while</span></b> <span style="color:#990000">(</span>input<span style="color:#990000">.</span><b><span style="color:#000000">empty</span></b><span style="color:#990000">())</span> <span style="color:#FF0000">{</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">" Enter number of choice > "</span><span style="color:#990000">;</span>
cin <span style="color:#990000">>></span> input<span style="color:#990000">;</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span><b><span style="color:#000000">isdigit</span></b><span style="color:#990000">(</span>input<span style="color:#990000">[</span><span style="color:#993399">0</span><span style="color:#990000">]))</span> <span style="color:#FF0000">{</span>
choice <span style="color:#990000">=</span> <b><span style="color:#000000">atoi</span></b><span style="color:#990000">(</span>input<span style="color:#990000">.</span><b><span style="color:#000000">c_str</span></b><span style="color:#990000">());</span>
<b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>choice <span style="color:#990000"><=</span> n_opt <span style="color:#990000">&&</span> choice <span style="color:#990000">></span> <span style="color:#993399">0</span><span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
<b><span style="color:#0000FF">return</span></b> choice<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span> <b><span style="color:#0000FF">else</span></b> <span style="color:#FF0000">{</span>
<i><span style="color:#9A1900">/* choice out of range */</span></i>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Your response MUST be between 1 and "</span> <span style="color:#990000"><<</span> n_opt <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
input<span style="color:#990000">.</span><b><span style="color:#000000">clear</span></b><span style="color:#990000">();</span>
<span style="color:#FF0000">}</span>
<span style="color:#FF0000">}</span> <b><span style="color:#0000FF">else</span></b> <span style="color:#FF0000">{</span>
<i><span style="color:#9A1900">/* Non-numeric input, ignore */</span></i>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"</span><span style="color:#CC33CC">\t</span><span style="color:#FF0000">Your response MUST be a number!"</span> <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
input<span style="color:#990000">.</span><b><span style="color:#000000">clear</span></b><span style="color:#990000">();</span>
<span style="color:#FF0000">}</span>
<span style="color:#FF0000">}</span>
<b><span style="color:#0000FF">return</span></b> <span style="color:#993399">1</span><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
</pre>
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