CMSC104, Fall 2008

Programming Project 3

Grade Calculator v2.0

Out: Monday, December 1, 2008
Due Date: Wednesday, December 10, 2008 before 11:59 p.m.

The Objective

This project is designed to give you practice using arrays in JavaScript.

The Task

You are going to make some improvements to the grade calculator that you designed in Project 1. Rather than storing each of the grades in individual variables, you are going to use arrays to store your data. You should have an array for each of the different types of grades: homeworks, projects and exams. You are also going to error check the user input. You should use the function GetValidInt() that you used in project 2. You should not have to make any changes to GetValidInt() in order to use it.

More Details

You must use for loops when dealing with the arrays (i.e. when you are reading the grades in from the user.)
The only function you are required to use is GetValidInt(). If you would like to create and use other functions, you are more than welcome to do so.
The valid range for grades is 0 to 105.

Screenshots

The sample output is the same as the sample output for Project 1.

Extra Credit

You should make your program work such that all of the grades do not have to be entered in order to find the average. In other words, the user can get his or her average at any time in the class, instead of just at the end. You should ask the user how many grades have been completed so far (i.e. How many homeworks are complete?) and then allow them to enter the grades. After getting the homework, project and exam grades, you should display the current average in the class. The screenshots below will show the specific prompts.