CSC 120A Lab Assignment 11 - Fall 2004

Thursday, November 11, 2004

Exercises:

(Input files and Java programs are in the "M:\Classes\CS120\Section A\lab11" directory.)

Complete Lesson 10-4 in the lab manual if you didn't finish it last week. Don't spend more than 20 minutes on this. If you're not done with it after 20 minutes, finish the two exercises below first and then come back and finish this one. You should look over the AddressBook program we went over in class to get an idea of how objects can be read from and stored to a file.

Design and implement an application that creates a histogram that allows you to visually inspect the frequency distribution of a set of values. The program should read in an arbitrary number of integers that are in the range 1 to 100 inclusive from the "values.dat" file; then produce a chart like the one below that indicates how many input values fell in the range 1 to 10, 11 to 20, and so on. Print one asterix for each value entered.

1 - 10 | ***** 11 - 20 | ** 21 - 30 | ********************* 31 - 40 | 41 - 50 | *** 51 - 60 | ******** 61 - 70 | ** 71 - 80 | ***** 81 - 90 | ******* 91 - 100 | *********

Make a creative improvement to the address book program we went over in class. As we discussed, you can extend it by one or more of the following (or if you have another idea, check with me):
- Add an option to search the address book (e.g. for some part of a person's name)
- Add an option to delete an address from the entries
- Keep the array of entries always sorted by name
- Before quitting the program, ask the user if he/she wants to save the address (but only ask if the user has made changes since the last time it was saved/loaded)

You may work in pairs for this lab. Each pair should turn in one set of answers with both partners' names on it.

Upload your program files for this lab in the appropriate section of the Viking Web coursework for this class. Also hand in a printout of your program files.

Last modified: Wed Nov 24 12:54:05 EST 2004