74.101 Slides - Computer Science

Computer Science 211
Software Tools and Systems
Tue. 3-4, Thu. 3-5, UC30
Software Tools & Systems Programming
I am Dr. Bin MA, your instructor.
I am an Assistant Professor of Computer Science at
UWO. You may reach me by
 [email protected]
 Middlesex College 364
 x. 86890
Software Tools & Systems Programming
To talk to me in person:
Pls. try to come only at my office hours:
 Tuesday
11-12, Wednsday 4-5
 Other time is fine but not encouraged.
TA’s office hours TBA.
We will decide other office hours for me and the
Teaching Assistants as the need arises.
Software Tools & Systems Programming
http://www.csd.uwo.ca/courses/CS211b contains:
 Assignments
 Lecture notes
will be posted at the END of the week in which
they are presented
Important notices
Texts and References
Mark G. Sobell, UNIX System V: A Practical
– about how to use Unix
– recommended
– but do have a reference book about Unix!
King, C Programming: A Modern Approach.
– about C Programming, a little about C++.
– required.
– readings from the book will be assigned.
Software Tools & Systems Programming
-- Goal
Unix and Program in C
Software Tools & Systems Programming
Topics (1)
Unix fundamentals
– history
– files
 think
of Windows files
– processes
 programs
that are currently running
 Unix allows concurrent processes
– shells
command line interpreter,
 think of the Dos prompt window
– basic commands
Topics (2)
– emacs
 an
editor, suitable for editing C programs.
– utilities
 applications
that are popular in the Unix community
– shell programming
 shell
is not only a command line interpreter
– regular expressions
 make
up a useful notation system to specify text patterns
in Unix community
 useful for some utilities and perl
– pipes and filters
 important
mechanisms in Unix
 combine simple commands to perform complex tasks
Software Tools & Systems Programming
Topics (3)
– Syntax: Variables, statements, functions.
– I/O: standard I/O, files.
– Standard library: standard functions that you
can include in your program.
– System calls: Communicate with the operating
Software Tools & Systems Programming
Topics (4)
 Software
– Make: helps to organize and build a program in
multiple files.
– SCCS, RCS: Source Code Control System,
Revision Control System.
– Lint, Gdb: tools that help you to debug a
Software Tools & Systems Programming
Topics (5)
 C++
– Classes and Objects: think of classes and
objects in java
– Templates: “uncertain” classes, you can declare
classes from a template class by filling
appropriate information at the “uncertain” fields.
– STL: Standard Template Library.
Software Tools & Systems Programming
Topics – conclusion
 Unix
 C programming
 Software tools
 C++
Student Evaluation
four (4) assignments each worth 6% of your final
– assignments are to be done individually.
one midterm exam held near the end of February.
– worth 20% of your final grade.
final exam worth 56% of your final grade.
Assignments (1)
Assignments involve
– shell programming
– C and C++ programming
– concept questions (non-programming)
Programming assignments must be able to run
on the departmental computing equipment
– You may develop assignments on your home computer.
– It takes time to get it work at a different environment.
Assignments (2)
All assignments will be available on the course
– the marks and answers for previous assignments will be
there as well
– please monitor these pages closely
Assignments are to be done individually.
It’s a good thing to discuss.
Never copy an assignment.
Never let others “have a look” at your assignments.
Be friendly not to ask to have a look at others’ assignments.
Assignments (3)
Assignment Submission Policy
– Assignments due by 5pm of the deadlines
 Hand in at appropriate assignment locker
– Late assignments
 accepted for up to five days after the deadlines
– weekends count as a single day
 late penalty of 5% of the available marks per day
 NOT based on the time it was printed
– Each student has three late coupons
 virtual coupons held by TA
 each coupon can cover the penalty for one day late
 cannot be used to extend the fifth day deadline
– You must follow assignment guidelines to ensure full marks
– Check the course website for more accurate information
Ethical use of Computing Facilities
 Students
are expected to adhere to the Rules of
Ethical Conduct to use the computing facilities
of the Department:
 You should receive an email about the rules.
Unix Basic
Unix accounts
You must have an “account” to use a Unix computer.
An account has a username and a password.
You can only access the resources that are specified
by your account information.
There is at least one super user account in a system
usually named by “administrator”, who has absolute
power over the system.
Login your account (1)
User name
Password is not displayed.
from Unix.
Login your account (2)
After login
Change password immediately if you login for the first
Ready for new command
To make a good password
A bad password
– Birth date.
– Telephone number.
– Name.
tricks to make a good password
– picked letters from a sentence.
 I love Unix  Ioenx
– a mix of upper and lower cases.
– use some non-alphabet characters.
– change your password regularly.
a bad password not only harms you
– attack is much easier with an account on the computer
– ITS and CSD also run password "crackers“ to guess your
password by "intelligent brute force"
Log out
Don’t forget to logout!
algernon% exit
algernon% logout
Some basic commands
who: Who are using the system.
algernon% who
scott tty02
jenny tty03
Aug 11 08:47
Aug 10 11:01
Aug 10 07:21
who am i: Who am I.
algernon% who am i
Aug 11 08:47
Some basic commands
ls: List the files under current directory
algernon% ls
cat: Display the content of a file
algernon% cat readme
Unix is easy!
notes.zip unix-faq
Some basic commands
Ctrl-c: (press <control> and c at the same time) Interrupt the
current task.
algernon% cat
netscape: surf the net.
algernon% netscape
Some basic commands
man: See the manual page of a command.
algernon% man cat
Reformatting page. Wait... Done
User Commands
cat - concatenate and display files
SYNOPSIS cat [ -nbsuvet ] [ file ... ]
cat reads each file in sequence and writes it on the standard output. Thus:
example% cat file
prints file on your terminal, and:
example% cat file1 file2 >file3
concatenates file1 and file2, and writes the results in
file3. If no input file is given, cat reads from the standard input file.
Try the following commands with man
cd: change directory to ..
more: show the content of a file in pages.
cp: copy a file from .. to ..
rm: remove a file.
mkdir: make a directory.
mv: move a file to..
mail: send an email.
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