<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<style>
<!--
@font-face
{font-family:Calibri}
@font-face
{font-family:Tahoma}
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif"}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
text-decoration:underline}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{margin:0cm;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif"}
span.EmailStyle17
{font-family:"Arial","sans-serif";
color:#1F497D}
span.BalloonTextChar
{font-family:"Tahoma","sans-serif"}
.MsoChpDefault
{font-family:"Calibri","sans-serif"}
@page WordSection1
{margin:72.0pt 72.0pt 72.0pt 72.0pt}
div.WordSection1
{}
-->
</style>
</head>
<body lang="EN-AU" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal"><a name="_MailEndCompose"><span style="font-size:10.0pt; font-family:"Arial","sans-serif"; color:#1F497D">One of mine said that too, but I insisted that he couldn’t have it because it wouldn’t pass through the first validation of the 1<sup>st</sup>
or 2<sup>nd</sup> digit referring to the card type – If Karl “has it in mind” </span>
</a></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Arial","sans-serif"; color:#1F497D"> </span></p>
<table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="696" style="width:522.0pt">
<tbody>
<tr>
<td style="padding:0cm 0cm 0cm 0cm">
<p class="MsoNormal"><b><span style="font-size:10.0pt; font-family:"Arial","sans-serif"; color:#1F497D">Damien Atkinson-Buck</span></b><span style="font-size:10.0pt; font-family:"Arial","sans-serif"; color:#1F497D"><br>
Member of Academic Staff (Secondary)</span><span style="font-size:11.0pt; font-family:"Calibri","sans-serif"; color:#1F497D"></span></p>
<div>
<div class="MsoNormal"><span style="font-size:10.0pt; font-family:"Arial","sans-serif"; color:#1F497D">
<hr size="2" width="500" align="left" style="width:375.0pt">
</span></div>
</div>
</td>
</tr>
<tr>
<td style="padding:0cm 0cm 0cm 0cm">
<table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="696" style="width:522.0pt">
<tbody>
<tr>
<td width="164" style="width:123.0pt; padding:0cm 0cm 0cm 0cm">
<p class="MsoNormal"><a href="http://myivanhoe.net/"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif"; text-decoration:none"><img border="0" width="200" height="64" id="Picture_x0020_2" src="cid:image001.jpg@01CC8CEE.BDB1C130" alt="Description: Description: cid:image002.jpg@01CA7D93.5FFD22D0"></span></a><span style="font-family:"Calibri","sans-serif"; color:#1F497D"></span></p>
</td>
<td width="5" style="width:3.75pt; padding:0cm 0cm 0cm 0cm">
<p class="MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif"; color:#1F497D"> </span><span style="font-family:"Calibri","sans-serif"; color:#1F497D"></span></p>
</td>
<td style="padding:0cm 0cm 0cm 0cm">
<p class="MsoNormal"><span style="font-size:7.5pt; font-family:"Arial","sans-serif"; color:#1F497D">PO BOX 91 The Ridgeway, Ivanhoe, Victoria 3079 Australia<br>
Telephone +61 3 9490 3848 Facsimile +61 3 9490 3490<br>
</span><a href="mailto:damien.atkinson-buck@ivanhoe.com.au"><span style="font-size:7.5pt; font-family:"Arial","sans-serif"">mailto:damien.atkinson-buck@ivanhoe.com.au</span></a><span style="font-size:7.5pt; font-family:"Arial","sans-serif"; color:#1F497D"><br>
</span><a href="http://myivanhoe.net/"><span style="font-size:7.5pt; font-family:"Arial","sans-serif"">http://myivanhoe.net</span></a><span style="font-family:"Calibri","sans-serif"; color:#1F497D"></span></p>
</td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif"; color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Arial","sans-serif"; color:#1F497D"> </span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt; font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt; font-family:"Tahoma","sans-serif""> Mark KELLY [mailto:kel@mckinnonsc.vic.edu.au]
<br>
<b>Sent:</b> Monday, 17 October 2011 2:59 PM<br>
<b>To:</b> Year 12 Software Development Teachers' Mailing List<br>
<b>Subject:</b> Re: [Year 12 SofDev] CSE/IARTV SD exam - question C4c</span></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal" style="margin-bottom:12.0pt">Another of my (less able!) students found a third logic fault in the code. If the CC number is all zeroes, it comes through as "valid" because the last digit of the total (zero) is 0!<br>
<br>
</p>
<div>
<p class="MsoNormal">On 17 October 2011 14:41, Mark KELLY <<a href="mailto:kel@mckinnonsc.vic.edu.au">kel@mckinnonsc.vic.edu.au</a>> wrote:</p>
<p class="MsoNormal">The C4c question expects students to find the logical error relating to the odd/even digit logic mixup, but there's another big logical problem with the pseudocode that several of my kids detected.<br>
<br>
The "Total = Total + 2 * digit" line is adding the digit times 2 (e.g. 7*2=14) instead of adding the individual
<b>digits</b> of the calculation (1,4) so the total is way off ! <br>
<br>
My better kids found that error and didn't deign to mention the bleeding obvious one that they were intended to find. I gave them bonus marks :-)<br clear="all">
<span style="color:#888888"><br>
-- <br>
Mark Kelly<br>
Manager of ICT, Reporting, IT Learning Area<br>
McKinnon Secondary College<br>
McKinnon Rd McKinnon 3204, Victoria, Australia<br>
Direct line / Voicemail: <a href="tel:%2B613%208520%209085" target="_blank">+613 8520 9085</a>, Fax
<a href="tel:%2B613%209578%209253" target="_blank">+613 9578 9253</a><br>
<a href="mailto:kel@mckinnonsc.vic.edu.au" target="_blank">kel@mckinnonsc.vic.edu.au</a><br>
VCE IT Lecture Notes: <a href="http://vceit.com" target="_blank">http://vceit.com</a><br>
Moderator: <a href="http://www.edulists.com.au/" target="_blank">IT Applications Edulist</a><br>
<br>
Want a good time? Call 0112358. Ask for Mr Fibonacci.</span></p>
</div>
<p class="MsoNormal"><br>
<br clear="all">
<br>
-- <br>
Mark Kelly<br>
Manager of ICT, Reporting, IT Learning Area<br>
McKinnon Secondary College<br>
McKinnon Rd McKinnon 3204, Victoria, Australia<br>
Direct line / Voicemail: +613 8520 9085, Fax +613 9578 9253<br>
<a href="mailto:kel@mckinnonsc.vic.edu.au" target="_blank">kel@mckinnonsc.vic.edu.au</a><br>
VCE IT Lecture Notes: <a href="http://vceit.com" target="_blank">http://vceit.com</a><br>
Moderator: <a href="http://www.edulists.com.au/" target="_blank">IT Applications Edulist</a><br>
<br>
Want a good time? Call 0112358. Ask for Mr Fibonacci.</p>
</div>
<br>
<br>
<br>
<br>
Privacy, Virus and Copyright Warning<br>
<br>
The information contained in this electronic message (e-mail), and any files transmitted with it:<br>
<br>
* is intended for the named recipients only. If you have received this in error, please advise the sender and delete it and any copies immediately;<br>
* Any personal information in this email must be used in accordance with the Privacy Act 1988 and this always applies even if it has been sent to you in error.<br>
* represents the views of the sender and does not necessarily represent the views or formal advice of Ivanhoe Grammar School;<br>
* may be subject to Copyright, so no further use should be made of it without the author's permission.<br>
<br>
The School does not represent or warrant that the email or any files attached do not contain errors or are free from computer viruses or other defects nor does it accept responsibility for any loss or damage resulting directly or indirectly from the use of
the email or any attached files.
</body>
</html>