4480, Fall 2007
Programming Assignment 1
Due Tuesday, September 25, 2007
Write a LISP function to compute n!
Submit a script (see below) with your functon and several test cases to
the submission system. Turn in a hard copy in class.
The submission system is at: http or
Making a Record of a Program
Run (by Dr. Sarraille):
Now that you are sure the program is working correctly, let's do
test. This one will be "for the record." Enter "script p1.script"
and wait until the computer writes a prompt on the screen again. (There
be a slight delay. The prompt you get now may be different than
Here's an explanation of what you just did: The "script"
turns on a program that makes a record of whatever appears on the
command you entered was "script p1.script" so the record the
program makes will be a file called p1.script.
Enter "a.out" and see your "Hello World!" message
the screen again. Now enter "exit" to turn off the scripting
program. From the time you entered "script p1.script" to the
you entered "exit", all things that were written on the screen
also recorded in the file called p1.script.
Enter clear to clear the screen. Now enter "cat p1.script".
This causes the computer to type the contents of the script file you
It should look something like this:
Note that the script file (named p1.script) starts and ends with
that tell when the script was started, and when it was completed. In
it reproduces what you typed.
Script started on Sat Aug 21 19:05:11 2004
script done on Sat Aug 21 19:17:37 2004
Now enter "jove p1.script" so you can look at the script file
the JOVE editor. You see your script. You also see "weird" characters
script like ^M at the end of each line, and maybe some other things.
characters are an undesirable side-effect of the way the scripting
interacts with special characters that handle the terminal display. The
characters are sometimes visible, and sometimes not, depending on just
try to display your script file. The characters were not visible when
displayed p1.script with "cat," but they were visible when you
JOVE. Do a C-x C-c command to exit JOVE.
When you turn in a real programming
assignment, you will be sending me the
source code, plus a script similar to the one you just made. The script
be a record that will show me that you did the right kind of testing of
I require you to run your script through a filter before you send it to
It's a way to get rid of most of the weird characters, so the script
more readable. It is easy to do, no matter how big the script is.
Here's how: Enter "cat p1.script | col -b
temp". This command pipes the script file to the input
command "col -b > temp", which filters out some of the
characters and writes the output to a file named temp. Now the temp
the filtered version of the script. Enter "mv
temp p1.script" to replace the script file with the new
filtered version. Now enter "jove p1.script" again. See how
file has been cleaned up? Good. Exit JOVE again by doing a C-x C-c