CS 230 Fall 2009

Assignment 3 –Simple IFs and Calculations

100 points

Assigned: 09/21/2009

Due: 09/28/2009 at the start of class

Pre-Lab (Do Before Lab):  Bring materials – a way to save a copy for you and a copy to turn in. Plan out tasks, objects, and events needed for program. Plan main button(s) with pseudocode or flowchart.

Main Assignment:

Imagine that you are writing a program for an amusement park. The amusement park charges admission based on the following criteria. Start with a base charge of $5. Add $2 for every year of age, up to a maximum of $20 additional ($25 total). Add $10 if the person is taller than 48 inches tall (so a maximum overall of $35). Tax is 8%. Write a program that calculates the price of admission for a customer. The task involves getting needed info from the user, performing calculations and displaying the output. In addition to the total admission cost, also display intermediate results including the subtotals and amount of tax.  Provide capabilities to calculate clear the text boxes to start again, and to exit.

Please set the name of the project to something other than the default name (WindowsApplication1, …). It is helpful if you use a name that identifies you as well as the assignment (e.g. yourlastname assignment 3).

Background Knowledge:

• Costs are given above.

Task Details:

• Define key numbers in the program (e.g. $5 base charge, $10 charge for people tall enough to ride the good rides) as named constants and use them.
• Note that we have now covered specifying how many decimal places to display – so display all money with dollar signs and two decimal places..
• We’re going to continue (for now) assuming that the clerk enters valid and reasonable values, so we’re not taking on too many new tasks at once.
• MAKE SURE YOUR PROGRAM WORKS! (i.e. gets the correct answers) - it doesn’t have to just run, it needs to run correctly!  Now that our program is branching, we need to try more examples to make sure that they work.

Miscellaneous:

• You must turn on Option Strict and Option Explicit
• Put YOUR NAME, e-mail address, date, and purpose of the program in comments at the beginning of the program. The purpose should be what the program is supposed to do, not the learning goals. Comments are indicated with a single quote (everything after the single quote is only for humans)
• You MUST include comments that explain your program in order to get full credit.
• Name all textboxes and buttons meaningfully, and use conventions for ending their names. Also, any labels referred to in code should also be named meaningfully.
• Make any textboxes that user should never enter a value in “Read Only” (or use labels instead!)
• Any variables that you declare should have meaningful names – descriptive of the data that they hold.
• Put your name on the form as a Label or as part of the form title.
• Try to use good user interface design. Make clear what user needs to do and what the answers mean.
• Any label controls used for results will be easier to find and click on etc if you turn the AutoSize property to false and size it yourself.

Hand in:

• Compressed (zipped) folder with your entire project containing all files related to the project, submitted to Blackboard.  Please name the zip file something along the lines of yournameAssignment3
• Print out of your code.