COMP 110-003 Fall 2008

Description

Part 1

On the course webpage you will find VendingMachine.java. Copy and paste the program into a new Java file in jGRASP. Compile (green plus sign) and run (red running man) VendingMachine.java. Don't forget to change the header at the top of the program to say your name. In the textbook on page 70 (4th edition) or page 68 (5th edition) you will find pseudocode for VendingMachine.java. Read through the pseudocode and make sure you understand the algorithm. Place each line of pseudocode into VendingMachine.java as comments directly above the line or lines that complete the action. The first line of pseudocode is already in the code as a comment. You may abbreviate the pseudocode comments when you place them into the code.

Part 2

On the course webpage you will find TotalCost.java. You need to complete this program so that it calculates the total cost of a new coat including tax. (The user will input the cost of the coat and the tax rate.) Write pseudocode for how you would solve this problem. Following your pseudocode, complete the program TotalCost.java. Just like Part 1 insert your pseudocode as comments into your program.
NOTE: you are dealing with money so you should declare your variables as double, a number with decimal points, instead of int, whole numbers. Also, when reading doubles from the keyboard you would write keyboard.nextDouble() instead of keyboard.nextInt().

Additional Questions

• How long did this lab take you?
• Did you find this lab hard? If yes, please explain where you had problems.

Grading

• 8 points Part 1
• 15 point Part 2, consisting of:
• 5 points Pseudocode
• 10 points Code and program headers
• 2 points Additional Questions

How to hand in the assignment

• A file named yourlastname_lab1.txt (or .doc), where yourlastname is your last name, that provides answers to the Additional Questions. Make sure the file has the appropriate header.
• A file named yourlastname_lab1.jar, where yourlastname is your last name. The .jar file should include VendingMachine.java and TotalCost.java. Your java files should have the appropriate header. Follow these instructions to create yourlastname_lab1.jar.
• Attach yourlastname_lab1.txt (or .doc) and yourlastname_lab1.jar to an email with subject COMP110 Lab1 yourlastname, and send me the email by the deadline.
• If you do not follow these instructions you will not get credit for the lab. Please let me know if you are having any problems with the assignment submission process.