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<H1><A NAME="BM_inal2"><FONT SIZE=6 COLOR=#008000>CSE/ENGR 142
Class Messages</FONT></A><FONT SIZE=6 COLOR=#008000> </FONT></H1>
<H1>Autumn 1996 <BR>
</H1>
<P>
Welcome to CSE/ENGR 142. We will use this page to make all sorts
of announcements about the class, homework corrections and clarifications,
etc. The newest messages are listed first. Check here often!
<HR>
<P>
12/6/96
<P>
<B>Old homework</B> (through HW5) and the midterm exam should
be picked up from your TA as soon as possible if you haven't done
so already. We will not entertain questions on old homework grading
after classes end December 11 (it's already too late for midterm
questions). We'll announce later how we'll get HW6 back to you
(it may be at the final exam).<BR>
<P>
<B>Audio in the IPL!</B> Most of you have probably noticed the
"<!WA0><!WA0><!WA0><A HREF="http://www.cs.washington.edu/research/projects/tslides/" >Lecture Slides with Audio</A>"
link on our main page, and some of you report having used it at
home. Viewing the slides while listening to the complete recorded
lectures from last quarter might strike you as a fabulous and
painless way to study for the final exam. We now have audio capability
in the IPL. You can bring your own headset (an ordinary Walkman-type
headset should work) and ask the lab monitor exactly where to
plug it in. The Macs and some of the PCs in Suzallo Library
are audio-ready, too. If you want to listen at home, there's
complete information on the audio page about what is needed.
Enjoy!
<P>
<P>
12/5/96
<P>
<B>Section Q</B> in the course packet ("Libraries, File I/O")
is incomplete; only one of the three original pages was reproduced.
Sorry. The missing pages <!WA1><!WA1><!WA1><A HREF="http://www.cs.washington.edu/htbin-post/unrestricted/cse142/byteserver.pl/education/courses/142/slides/ho-q-libraries+io.pdf" >can be found on the Web</A>.
(Actually, it's likely we won't cover all of this material, anyway).
<BR>
<P>
<B><FONT COLOR=#FF0000>H</FONT>oliday <FONT COLOR=#00FF00>H</FONT>ours</B>
in the <FONT COLOR=#FF0000>I</FONT><FONT COLOR=#00FF00>P</FONT><FONT COLOR=#FF0000>L</FONT>.
The IPL will remain open normal hours through December 16. December
17 and 18 it may be partially closed for cleaning; after that
it will close and not reopen until Monday, January 6. Consultants
will be on full duty until 5:00 on Monday, December 9.<BR>
<P>
12/4/96
<P>
<!WA2><!WA2><!WA2><A HREF="http://www.cs.washington.edu/homes/zahorjan/142-Survey/survey-responses.html">Computing survey results</A>
have been tabulated for the 145 people who have responded so far.
Some of the comments are pretty fascinating (look for the one
about "eating oreos and drinking wine" as an advantage
of computing at home). If you haven't taken the survey yet, we
would really like you to -- why not <!WA3><!WA3><!WA3><A HREF="http://www.cs.washington.edu/homes/zahorjan/142-Survey/machine-survey.html">take it now</A>,
before reading your fellow students' responses, to keep from being
influenced by them.<BR>
<P>
11/27/96
<P>
<B>Thanksgiving holiday hours for the IPL</B>: closing at 5:00
pm Wednesday; closed all day Thursday and Friday; open 9-5 Saturday,
noon-midnight Sunday. Consultants may not be working their regularly
scheduled hours.<BR>
<P>
A copy of the <B>problems from the recent ACM regional programming
contest</B> has been thumbtacked to the bulletin board outside
the IPL. If you borrow it to study or copy, please return it promptly.
So far, that particular problem set doesn't seem to be on-line
anywhere. You can look at lots of problems from previous competitions
on the <!WA4><!WA4><!WA4><A HREF="http://www.acm.org/contest/archive.html">ACM contest archive page</A>.
Practically all of them are solvable (in principle) with what
you now know about C programming, except that they take their
input from a file rather than from the keyboard.
<P>
11/26/96
<P>
There's been a <B>problem printing hw6orig.c</B> from within MSVC
-- the printing is cut off after about two pages. You can use
another program to print from (such as Notepad), or bring up the
"direct" copy of hw6orig.c from the HW6 page and print
from Netscape. We're looking at the problem and will post a new
archive if we can find a solution. Sorry once again for any inconvenience.
<BR>
<P>
11/26/96
<P>
<B>The PC archive for HW6 has been reenabled</B>. The McAfee virus
checker found no infection. Nevertheless, use caution as always
when transferring files from one computer to another. If you have
virus checking software on your home computer (strongly recommended
anyway), you might wish to run it against your hard drive before
and after loading and unpacking the HW6 archive. Please report
any problems right away. And we are very sorry for the inconvenience.
<BR>
<P>
<B>The PC archive has been temporarily disabled</B> due to suspicion
of a virus. We hope to have it back shortly. Meanwhile, remember
that you can study the hw6orig.c program and the detailed instructions
to help develop your design specification. The only thing you
can't do is run the demo.<BR>
<P>
11/26/96
<P>
Two of the <B>comments in the HW6orig.c</B> program are reversed.
In the function draw_world(), where it says /* draw horizontal
grid lines */ it should say /* draw vertical grid lines */ and
vice-versa.<BR>
<P>
11/25/96
<P>
Please help us by filling out a <!WA5><!WA5><!WA5><A HREF="http://www.cs.washington.edu/homes/zahorjan/142-Survey/machine-survey.html">questionnaire on computing support</A>.
We would like to find out what we can do over the next quarter
or so to improve computing support for this course, both for those
using the programming lab and for those computing at home. The
form is easy and fun to fill out and submit, so please do it now,
or find a few minutes to do so sometime in the next few days.
<P>
11/25/96
<P>
As we announced in class this morning, the UW teams did spectacularly
well in the <B>ACM programming competition </B>on Saturday. Thanks
go to all of you for tolerating the loss of the IPL for the day.
A special thanks to a couple of students in the course who worked
as volunteers at the event. You can find their names, and lots
more interesting information, at <!WA6><!WA6><!WA6><A HREF="http://www.cs.washington.edu/homes/lazowska/acm/">http://www.cs.washington.edu/homes/lazowska/acm/</A>.
<P>
11/22/96
<P>
<B>HW#6 is now available</B> on the Web. Note that <B>a piece
of it is due next Wednesday</B>, November 27 (the date on the
in-class handout, November 21, was obviously wrong).<BR>
<P>
11/20/96
<P>
<B>Clarification on HW#5</B>: A comment buried in the code of
HW5orig.c suggests that the user should be able to press 0-9 on
the keyboard in order to change the message number. Please ignore
this comment; it was left over from an early version of the demo
program. You do not have provide this functionality in your program.
If you've already done so, it's OK to leave it in, however. Apologies
for any confusion.<BR>
<P>
11/19/96
<P>
<B>HW#5 and Windows 3.1</B>: In case you're running Windows 3.1
at home, we have <!WA7><!WA7><!WA7><A HREF="ftp://ftp.cs.washington.edu/courses/cse142/96a/hw5-demo.exe">a 16-bit executable version of the demo</A>
which can be downloaded. However, it will probably run only if
you have Borland C++ installed. If you're using Windows 95 or
Windows NT, please don't even bother; if you are on Windows 3.1,
try it out and let us know if you encounter any problems.<BR>
<P>
11/19/96
<P>
<B>More statistics from the midterm exam</B>. 424 students took
the test. Perfect score was 72. Standard deviation was 12.7. There
were 6 72's (100%) and 12 71's. 112 students scored 65 (90%) or
above. The mean was 55.2 (77%). The median was 59 (82%); 210 students
were below the median and 206 were above. There were 74 scores
below 44 (60%).<BR>
<P>
11/18/96
<P>
<B>The IPL will be unavailable</B> on Saturday, November 23. It
will probably also be unavailable for the final hour of normal
open times on Friday, Nov. 22, i.e., unavailable from 5:00pm to
6:00pm. This is because the IPL will be the venue for the <B>ACM
Programming Competition</B>. If you're interesting in volunteering
to help out with the competition, talk to one of the instructors
or to professor Dan Weld (weld@cs.washington.edu). It would be
a great way to meet students from other universities who are also
interesting in computing. Other campus computing sites should
be open normal hours on those days.<BR>
<P>
<B>HW#5 is now open for turn-in</B>. Some changes have been made
to the software which we hope will result in overall faster processing.
If you notice any problems at all, please notify a consultant
right away or send e-mail to an instructor.<BR>
<P>
11/12/96
<P>
<B>Fallout from the HW#4 turn-in debacle</B>: Over 350 people
bravely overcame the obstacles and got HW#4 turned in by early
Saturday afternoon. We're sorry it was such a frustrating experience.
We've heard from a couple of people who because of holiday plans
had to leave campus before being able to do a successful turn-in.
<B>If that was your situation</B>, please send us a short e-mail
to that effect (it does not have to have a lengthy justification,
just a note as to your name, section, student number, and a brief
reason) and we will set up a special period when turnin for HW#4
will be open again. Meantime, the consultants will be asked not
to give any further help on HW#4. If you had already sent us e-mail
about the situation, please respond again anyway so that we're
sure your name will appear on the list of authorized people.
<BR>
<P>
11/9/96
<P>
Notes on HW#5: GP142 is a <B>Windows program</B>; it requires
a GUI (graphical user interface) environment, and will not run
under DOS. It should be OK on Macintosh, although we have not
completed our testing there. The demo program currently in the
archive will run on Windows 95 or Windows NT only.
<P>
We are testing a <B>Windows 3.1 version</B> of the demo and will
put that in the archive later; it might require some further set-up
or helper files. Meanwhile, if you have Windows 3.1 at home, the
hw5orig.c program will probably compile, but we're not sure if
it will run properly unless you happen to have the Borland C++
version 4.5 compiler installed; in any case, you will need to
figure out how to create a project file or make file that pulls
together all the required files.<BR>
<P>
The <B>turn-in form for HW#5</B> will not be enabled until all
the dust has cleared from HW#4.<BR>
<P>
11/8/96
<P>
A further reminder about the HW#4 lab report: <B>please be sure
it is in plain ASCII format</B> (see message from <!WA8><!WA8><!WA8><A HREF="#dotdoc">11/6</A>
below.) There is increasing suspicion that files in .doc or other
word processing formats may contribute to the slowdown problem.
They are also apparently one cause of the "document has no
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