CSCI 3210 Program 1
Program Assigned: September 4, 2008
Program Due: September 9, 2008 (midnight)
1. [DO NOT DO THIS[ Students need to complete Cultural Survey at :
http://zeus.csci.unt.edu/surveys.jsp
2. Write combinations of FIRSTs and RESTs (or CARs and CDRs) to pull the X out of the
following expressions.
For example (first (rest (first (rest „(a (b X) (d e)))))) => X
(bill bob jane X fred carl)
(bill (bob jane) (X fred) carl)
(bill (88 (jane (33 X fred ))) hillary)
(bill hillary chelsea (monica (ken X)))
3. Write corresponding lisp functions for the following arithmetic functions:
1 + 2 * 3
(1 + 2) * 3
2 * 4 + (6 – 8)
5 + (- 3 + 4)
---------------
6 + 2/5
4. Define a function average with two arguments which returns the average value.
Example: (average 3 7) returns 5, (average 1 1) returns 1
5. Define a function that returns „Waldo‟ if it is anywhere in the list.
Example: (where-is „(Ralph Sam Waldo)) returns Waldo
6. Define a function that returns:
a. the word „baby if the age of the person is less than 2
b. the word „child if the age of the person is less than 18
c. the word „adult if the age of the person is less than 120
d. the word „dead if the age of the person is more than 120
