Bruce will be at the science center Wed 25 Nov from 6:30PM-8:30PM. Check the classroom and/or lab.

On the Assignment 6 Page is a link to a script that shows how to process command line options as well as filenames.

Please read the faq at the /project page for more information.

If you read the source code to ws13.c, you will see that the delete() method comments say that function is not correct and says you have to correct it. Please do so.

The project assignment #5 has been posted.

The page for tt2ht now has links to two sample solutions. These are good examples of programming style and effective algorithms.

The word frequency counting project is posted on the assignments page.

Use this command from your account on nice:

~lib113/handing pptrs

The assignment on pointers is posted. It is due in a week. It is a short but really important assignment.

When you run who on the web server via a cgi page, nothing shows up. The reason is that there are no people logged into that machine. Recently (since last year, I think) the web server is a dedicated machine that regular users do not login to. Therefore who shows no people logged in.

A more useful, user-related command is last -10 which shows the last 10 logins on the machine. A few entries may show up. The output of last is also a text table with well-defined columns.

A subtle lack of consistency between the nice machines on which you compile code and the web server on which the cgi scripts run causes C tools (like tt2ht) to fail mysteriously.

A solution is to compile with the -fno-stack-protector option, as in

cc -fno-stack-protector tt2ht1.c -o tt2ht1

We hope to have this cleared up soon.

The second assignment is now posted on the Assignments section of this site.

note1: day not time

The text version of the assignment used to contain an version of problem 6 that asked you to write code to find bad values in the TI field. The current version asks you to find bad values in the day field. Please do the current version.

note2: backslashes in problem 3

The program you write is supposed to retain the backslashes. Therefore:

Input	output
"hello"	hello
"he said \"hi\""	he said \"hi\"
"hello\t\n"	hello\t\n
"use \\ to get \ in C"	use \\ to get \ in C

The webpage for Assignment 1 has a link to a piece about finite state machines. This information can help you a lot with the first assignment.

The article at this link explains clearly the basic principles of building and using tools in a Unix environment.

The first assignment is now posted on the Assignments link. Most of it is based on the material in class 2 and some of class 3.

The class meets in the Harvard Science Center room 110.

If you are new to the Science Center computer system, new to Unix, want to discuss your preparation for the course, or just have questions about the course, come to office hours and/or an introductory section the first week.

Date	When	What	Where
Wed Sep 2	7:35-9:35	Class 1	Science Center Room 110
Thu Sep 3	6:00-8:30	Office Hrs	Science Center Linux Lab
Wed Sep 9	5:30-7:30	Office Hrs	Science Center Linux Lab
Wed Sep 9	6:00-7:00	Section	Science Center Room B-10
Wed Sep 9	7:35-9:35	Class 2	Science Center Room 110
Thu Sep 10	6:30-7:30	Section	Science Center Room 111
Thu Sep 10	7:30-9:00	Office Hrs	Science Center Linux Lab

Welcome to the website for CSCI-E113: Introduction to C, Unix/Linux, CGI Programming. The course begins on Wednesday, September 2, 2009 at 7:35PM.

Course Prerequisites We expect students to have a good knowledge of programming; the course introduces programming in C/Unix/CGI, not programming itself. Try these exercises to be sure you are not getting in over your head.

If you have questions about the course, please write to the instructor: Bruce Molay (molay at fas.harvard.edu).