mbmailasgn08.htm; updated 4/15/2004

 

VB Mail Assignment 8

 

The VB Mail Order firm has hired you to create a project that displays the mailing distance between two cities.  The project will compute the cost of mailing a package as a function of the distance between cities.  The form for the project is shown here.

 

 

 

Requirements.

 

At Design Mode:

• Store the distances in a two-dimensional table.  The distances are:

 

	Boston	Chicago	Dallas	Las Vegas	Los Angeles	Miami	New Orleans	Toronto	Vancouver	Washington D.C.
Boston	0	1004	1753	2752	3017	1520	1507	609	3155	448
Chicago	1004	0	921	1780	2048	1397	919	515	2176	709
Dallas	1753	921	0	1230	1399	1343	517	1435	2234	1307
Las Vegas	2752	1780	1230	0	272	2570	1732	2251	1322	2420
Los Angeles	3017	2048	1399	272	0	2716	1858	2523	1278	2646
Miami	1520	1397	1343	2570	2716	0	860	1494	3447	1057
New Orleans	1507	919	517	1732	1858	860	0	1307	2734	1099
Toronto	609	515	1435	2251	2523	1494	1307	0	2820	571
Vancouver	3155	2176	2234	1322	1278	3447	2734	2820	0	2887
Washington D.C.	448	709	1307	2420	2646	1057	1099	571	2887	0

 

 

• The charge for shipment is a function of the miles and is expressed using the table shown below.  Use a Select Case structure to compute the correct mileage charge. 

 

Miles	Charge
0	No charge
1 to 100	$0.075 / mile
101 to 800	$0.07 / mile
801 to 1500	$0.065 / mile
1501 and over	$0.06 / mile

 

Ø      Example #1:  a package is to be shipped from Toronto to Chicago, a total of 515 miles.  The cost is computed as follows:

o       First 100 miles @ 7.5 cents/mile = $7.50

o       Next 415 miles @ 7 cents/mile = $29.05

o       Total cost of shipment = $7.50 + $29.05 = $36.55

Ø      Example #2:  a package is to be shipped from Miami to Las Vegas, a total of 2570 miles.  The cost is computed as follows:

o       First 100 miles @ 7.5 cents/mile = $7.50

o       Next 700 miles @ 7 cents/mile = $49.00

o       Next 700 miles @ 6.5 cents/mile = $45.50

o       Last 1070 miles @ 6 cents/mile = $64.20

o       Total cost of shipment = $7.50 + $49.00 + $45.50 + $64.20 = $166.20

*If you don't feel like entering the data from the table into an array, you can paste it into word by going Edit, then Paste Special, and choosing unformatted text, then copying each line into VB, and adjusting the entries into your array.

 

*A group of If/Then statements will work.  If the array is called "distance", then it might look like this:

 

If distance > 100 And distance < 801 Then

txtPrice.Text = 100 * 0.075

distance = distance - 100

txtPrice.Text = FormatCurrency(txtPrice.Text + (distance * 0.07))

Exit Sub

End If

 

If distance > 800 And distance < 1501 Then

txtPrice.Text = 100 * 0.075

distance = distance - 100

txtPrice.Text = txtPrice.Text + (700 * 0.07)

distance = distance - 700

txtPrice.Text = FormatCurrency(txtPrice.Text + (distance * 0.065))

Exit Sub

End If

 

This is only part of the code (above) you would need to finish for greater than 1500.

 

On Startup:

• Suggestion:  load the values into the distance table using the Form_Load event OR declare a module-level table and load the values during the dimensioning of the table.
• Use combo boxes to store the city names.  No city should be selected in either combo box when the system starts up.

 

During Execution:

• Distance & Charge button.  The system user will select two cities.  It does not matter if the cities are identical.
• If one of the combo boxes does not have a city selected, display an appropriate error message, with OK button, and the Error icon in the message box.
• If both combo boxes have a city selected, display the distance in miles and the charge (formatted as currency).  Your code to display the distance must use one of the programming techniques covered in the notes or textbook for chapter 7 or 8.
• Clear button.  When clicked, clear both labels that display the distance mileage and charge, and unselect any city selected in the combo boxes and clear any city names displayed in the combo boxes' Text property.
• Exit button/menu.  Exit the system by closing the form.

 

Assessment of Project.  Your work will be evaluated in terms of major and minor errors.  The point deductions are explained below.  An assessment (test) plan is provided that lists the different types of errors.

• Major errors – one point is deducted for each major error committed.
• Minor errors – one point is deducted for having between 1 and 3 minor errors; 2 points are deducted for having between 4 and 6 minor errors; 3 points are deducted for having between 7 and 9 minor errors, and so forth.

 

Test Data.  You must produce test data to test all possible combinations of distance charges.  

 

Test Plan.  This test plan lists the various errors that can occur.  Major errors are indicated by two asterisks **.

 

 

Visual Basic Project Assessment Plan - VB Mail Order Assignment 8

 

Student:_________________________________________________________Possible Points: 20

 

Before startup.

• Submitted on time without all files necessary to run the project – project is returned for resubmission – this is a major error, when the project is regraded,
• All files not stored to a folder named VBMailLab8.  Project should be named VBMailLab8.
• Form has spelling errors. 
• Form controls are misaligned or improperly sized such that the appearance of the form is NOT pleasing and professional.  Form has too much or not enough white space.
• Code is not properly indented.
• Program code is missing sub procedure comments.
• Program code is missing comments giving the program name, programmer name, and date programmed.
• Controls are not named following the naming convention specified in the textbook and notes.
• The mileage table is not implemented as a two-dimensional table **.
• Fails to use a SELECT-CASE structure as part of the code to compute the mileage charge **.

 

Startup.

• Form fails to startup centered on the screen.  Form is not an appropriate size.
• Missing Distance Look Up in the text area at the top of the form.
• Form erroneously has cities already selected when the system starts up.

 

Distance & Charge button.

• Computes the incorrect distance or fails to display a distance (double-major error -2).
• Fails to use one of the programming techniques covered in the notes or textbook for chapter 7 or 8 (quadruple-major error -4).
• Computes the incorrect charge or fails to display a charge (quadruple-major error -4).
• Fails to display the charge formatted as currency.
• When a city is not selected in one of the combo boxes, fails to display a Message Box with the appropriate error message.
• Message Box has an error message, but is missing the Error icon.
• Message Box is missing an appropriate title.

 

Clear button.

• Fails to clear the distance mileage and/or charge labels.
• Fails to unselect both city combo boxes.
• Fails to clear the contents of the Text property of the combo boxes.

 

Exit button.  Fails to exit the system.

 

During program execution, the program abnormally terminated (ABEND) due to an error (** -- major error – specify the error):