CS 1401 Assignment #12

Date Assigned: Monday, April 16, or Tuesday, April 17, 2007.

Due Date: Monday, April 23, or Tuesday, April 24, 2007, before the beginning of your lab section.

Objective: The main objective of this assignment is to learn to handle exceptions.

Programming assignment: add exceptions to our Programming Assignment 7.

Programming Assignment 7: reminder. To help compute average grades and student GPAs,

write a method that, given a name of the file with numbers, computes the average of all these numbers, and
write a program that uses this method.

Test your program on an example of a simple file with 2 or 3 numbers.

Hint:

first, create a reader to read from the given file;
read the records (numbers) one by one; as you read each number, add this number to the sum-so-far, and add 1 to the counter (number of records read so far);
compute the average by dividing the sum of all the records by the total number of these records.

New part: If the file is empty or if one of the numbers in the file is negative, throw and handle appropriate exceptions -- and inform the user about the problem.

Homework assignment: on a separate sheet of paper, solve Ex. 4 and 6 at the end of Chapter 12 (on pp. 799 and 800).

Deliverables: as instructed by your TA.