Visual Basic I/O

Directions: There are two parts (I and II) to this homework assignment.  Complete both in two separate files then submit both as your Module 4 Homework Assignment. PART I: Complete the following program exercises.  When you have completed the following exercises, compress the program folder and submit the .zip file.  These are all separate exercise, so you will have a separate file for each exercise. Exercises from 5.1 Determine the output displayed when the button is clicked Problem One: Private Sub btnConvert_Click(…) Handles btnConvert.Click     ‘Convert Celsius to Fahrenheit     Dim temp As Double = 95     txtOutput,Text = CStr (CtoF (temp) )End SubFunction CtoF (ByVal t As Double) As Double     Return ( (9 / 5) * t) + 32End Function Problem Two: Private Sub btnDisplay_Click(…) Handles btnDisplay.Click     ‘Rule of 72     Dim p As Double     p = CDbl (txtPopGr.Text) ‘Population growth as a percent     txtOutput.Text = “The population will double in “ &                             DoubleTime(p) & “ years.”End Sub Function DoublingTime(ByVal x As Double) As Double     ‘Number of cars that can be parked     Return 100 * xEnd Function Problem Three: Private Sub btnDisplay_Click(…) Handles btnDisplay.Click     Dim d As Date = #12

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/4/2011#     txtOutput.Text = MonthAbbr(d)End Sub Funcion MonthAbbr(ByVal d As Date) As String     Dim str As String = FormatDateTime(d, DateFormat.LongDate)     Dim n As Integer = str.IndexOf(“ “)     Return str.Substring(n + 1, 3)End Function Exercises from 5.2 Write a program that displays the output shown in a list box.  The last two lines of the output should be displayed by one or more Sub procedures using data passed by variables from an event procedure. Problem One: Assume that the following is displayed. According to a 2008 survey of college freshman taken by the HigherEducation Research Institute:16.7 percent said they intend to major in business.1 percent said they intend to major in computer science. Problem Two: Assume that the label for txtBox reads “What is your favorite number?”, and the user types 7 into txtBox before btnDisplay is clicked. The sum of your favorite number with itself is 14.The product of your favorite number with itself is 49. Problem Three: Assume that the current date is 12/31/2010, the label for txtBox reads “What is your date of birth?”, and the user enters 2/3/1984 into txtBox before btnDisplay is clicked. You are now 26 years old.You have lived for 9824 days.  PART II: Write a 2 page research paper (excluding the title page) on Function Procedures.

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