Wentworth Institute of Technology
Division of Professional and Continuing Studies
COMP380 Section 71 - Data Structures I - Spring, 2007
Homework 1 – Traffic Lights
Instructor: Bob Goldstein (617) 912-2512
bobg@vision.eri.harvard.edu
http://webpages.charter.net/tlgcreations/Courses/index.html
http://goldstein.eri.harvard.edu/courses/index.html
http://myweb.wit.edu/goldsteinr/Courses/index.html
Due Date: January 23, 2007
Hand In: Printout of program code and dialogue of how it runs.
Purpose:
This homework is intended to use the enum facility, enhanced for statement and the Scanner class.
Description:
This program is based on problem 1.10 of Ford and Topp
Declare the enum
enum TrafficLight{green, yellow, red};
Using an enhanced for loop and a switch statement, sequence through the TrafficLight values and
output the color of the light along with a message associated with each color. The messages are as follows:
green – “SafeToGo”
yellow – “ExerciseCaution”
red = “StopImmediately”
The messages should NOT be hardcoded into the program. The messages should be read from a file that
you create. Make the file with the messages using a text editor (Notepad is ok), called trafficText.txt and
read in the messages using the Scanner class.
Here are the contents and format of the tab-delimited file:
green SafeToGo
yellew ExerciseCaution
red StopImmediately
Here is an output of the program. The program requires no user input:
3 color messages read into the program
The values of the traffic lights and their meanings are:
green SafeToGo
yellow ExerciseCaution
red StopImmediately
/app/work/qkd80q-459235-2765026-homework1-doc.doc 1 12/5/2020 12/5/2020