Programming Homework 3

This assignment is due by the start of class on Friday, February 28. You are encouraged to do this homework with your partner, and you are welcome to get help on it during the lab time Tuesday.

Submit a printout of your solution to the problem below. Make sure that your name and account name are in comments at the top; for example,

/* Description: Programming Homework 3
   Filename:    program3.cpp
   Account:     CSC121xx
   Author:      Your Name
   Date:        Today's Date
*/

If you work with your partner, you only need to submit one copy of the program; be sure that both of your names are listed in the comments (the account name should be the one in which the solution is stored).

You should start by copying the folder called Program3 from my public directory, I:\CSC121\public\Howard\, into your own folder, I:\CSC121\CSC121xx\. When you open your copy of the project, by following the same instructions as for the labs, you should see the comments shown above; modify them as needed and continue writing your program.

Please remember that you will be graded on program style as well as correct output. Style points include proper use of functions to break up your code, indentation of function and loop bodies to make the structure of your code easy to read, and the inclusion of comments to identify the parts of the program and to state the required pre- and post-conditions for each function other than main. A program without all of these style points will not receive full credit.

The assignment is to produce a program that first asks for a number of grades, n, and then asks for a grade n times in succession. For each of the n grades, which should be a number between 0 and 100, it should print the corresponding letter grade (use the scale where 90 and up is an A, 80 to 89 is a B, 70 to 79 is a C, 60 to 69 is a D, and 0 to 59 is an F). It should also count how many of each letter grade are entered; at the end, it should print a table giving these counts.

For example, here is a sample session (the _'s are to indicate user input; your program will not show them):

How many grades? _5_
Enter grade 1: _92_
That's an A
Enter grade 2: _73_
That's a C
Enter grade 3: _80_
That's a B
Enter grade 4: _100_
That's an A
Enter grade 5: _59_
That's an F

Grade counts
A: 2
B: 1
C: 1
D: 0
F: 1

Your program should also contain the usual introduction and farewell messages. The main function should just call the other functions in sequence; it should not contain any of the grade reading or counting code itself.