CSC 160 Fall 2005 Homework 4
Assigned Oct 14, extended to WEDS Nov 2

Read Chapter 5 of the textbook (pages 46 to 49).

Read the article on Pair Programming.


Submitting this Assignment
--You may complete this assignment alone or in pairs.
--For each function, be sure to follow the design recipe. Write all the function purposes, contracts, examples, skeletons, and function definitions in the same Definitions Window. Save as hw4[LastName]Def.scm.
--Also test each program. Save the resulting Interactions window as hw4[LastName]Test.scm.
--If you do the assignment in pairs, include both last names in each file name.
--Send an email to Wittenstein@adelphi.edu. Be sure to include your name(s)!


The Assignment
1) Write a function named full-name which takes someone's first name and last name (both as strings) and returns their full name.


2) At Exit 17, the speed limit on the Southern State Parkway is 55 mph. Develop a function named radar which takes someone's speed in mph and returns one of the following symbols: 'under-limit, 'at-limit, or 'over-limit, based on that person's speed.


3) Three candidates (Athena, Barbara, and Chris) are running for mayor of Schemeville, which, by court order, has a new computerized voting system. Develop a function named who-won which takes in three numbers (the number of votes for Athena, the number of votes for Barbara, and the number of votes for Chris, respectively) and returns a string indicating the name of the person who won -- either "Athena", "Barbara", or "Chris". For example,

(who-won 7 4 5) "should be" "Athena"
(who-won 5 11 36) "should be" "Chris"

Note that the number of votes cannot be a decimal, a fraction, or a negative.
For full credit, you may assume that there are no ties. For extra credit, come up with a way to handle ties.

Grading	Purpose	Contract	Examples	Skeleton	Template	Definition	Testing
Question 1	/3	/3	/3	/3		/15	/3
Question 2	/3	/3	/3	/3	/5	/15	/3
Question 3	/3	/3	/3	/3	/5	/15	/3

Last Modified: 11/1/05