Name:__________________________________________________________________Section:___________
CIS 120-101 Fall 2007
Programming Assignment 3
Due: Week 6 (Fri 9/28/07)
Problem Description
Design and implement a program with a Java class called “Program3” that will ask a user how many numbers that he would like to
input (you may assume that the user will input some integer or hit the cancel button). If the user hits the cancel button exit the
program saying that you are doing so (see sample output). If the user says that he want 0 numbers generate a screen that shows that no
numbers were entered thus there is no sum , average, minimum or maximum (see sample output). If the user enters a negative number
then give him an error message and exit the program (see sample output). If the user says he wants to enter some positive number of
numbers (e.g. 3) then you are to loop that number of times asking him to input a number (e.g. 3 times asking him to input an integer).
As you are getting these inputs you should track (a) the sum of them, (b) the maximum value seen, (c) the minimum value seen. After
the last of his numbers has been entered, you should use JOptionPane to report the number of integers entered, the sum of those
integers, the average of those integers, the minimum of those integers and the maximum of those integers (see sample output on next
page). If during the input of those integers he hits the cancel button you should show a screen saying so and exit the program.
Code Requirements:
Your code for prompting the user for integer input, doing comparisons to find the current maximum, current minimum, and current
sum must be performed inside a looping structure. Your output windows must have a title of “Program 3 (Your Name)” with an icon
of the correct type..
Error Checking:
You should handle the case of the user clicking cancel on ANY of the input dialog boxes. If he does click cancel at any point you
should produce a screen saying that the Cancel was hit and that the program is terminating. You are not required to error check for
non-integer String input.
Hint: The first time through your looping structure you will want to initialize your variables for the current maximum, current
minimum and sum to the first integer inputted. Since you only want to do this initialization one time, you may want to do something
like the following code after you have asked the user to input an integer and performed the appropriate error checking:
if (firstIteration) // firstIteration will be a boolean variable initialized to true outside the loop body
{
// initialize max, min, sum to inputted number
// set firstIteration to false
}
Hint: Use Google to do a search on Java JOptionPane if you need to read more online about that class method. (1st choice)
Filename Requirements: Your program must be saved to a file called Program3.java
You must submit a printed and electronic (CD or Floppy) copy of your commented program along with a printed copy of your
problem analysis, pseudocode, completed data dictionary, completed test design table and screen captures of the input and
output for all 5 test cases in a manila envelope. Hint: when a desired window is showing you can capture the screenshot to the
Windows clipboard by hitting Alt-PrintScreen. You may then inside of your word processor use Paste (Ctrl-V) to paste that
clipboard screen image into your file (your screen shots for all test cases run must be submitted with your assignment).
Problem Analysis - all inputs, processes, and outputs described. You must also include any formulas or constants in the problem
analysis.
Pseudocode – These steps should be detailed enough for you to transform each English-like statement into Java statements.
Data Dictionary (You may add additional lines)
Variable Name Type Usage
