COS 125 FALL 2009 HW #11 DUE TUESDAY 10/20/09 BY 3 PM
Z stands for the Zelle Book
D stands for the Downey Book

Problem #1. True/False questions on pp. 225-226 of Z.

Problem #2. Multiple Choice questions on pp. 226-227 of Z.

Problem #3. Do programming Problem 17 on p. 230 of Z. Unfortunately, the 
sleep function does not seem to work as the problem suggests. There seems 
to be some incompatibility between Zelle's graphics package and the time 
package. I want you to modify the program as follows. Make the window size 
400 x 400. Make the moves 10 and -10 units instead of 1 and -1. Make it so 
that each time you click the mouse the circle moves. Set up a label in the 
middle of the circle that shows how many times you have clicked the mouse. 
The label should move with the circle. Make sure that when the center of 
the circle marches off the screen that you reverse the direction of 
movement. Set up the program so it will take at most 100 clicks. In your 
documentation, show the circle at clicks 17, 29, 41, 43 and 89.

Problem #4. Write a program to solve the following problem. Find a word in 
English that contains 3 consecutive pairs of identical letters. For 
example, committee does not quite work because there is an "i" between the 
"mm" and "ttee". Mississippi also does not work because of the extra i's 
between the pairs of "ss", "ss" and "pp". Be sure to design your program 
carefully and use the incremental development approach that we have been 
advocating. You should use the text file words.txt which is on the COS 125 
website.

REMINDER: Project 1 Impact Document Rewrite Due (Optional)