CSC 230: The Week beginning Sep. 3

Homework

Provide a brief definition of the following terms (in the interface programming context):

• Subroutine
• "Handle an event"
• Control structure
• Boolean
• Concatenate
• Operator

If you use a source (book or web site), cite your source. (The sites http://whatis.techtarget.com/ and http://www.webopedia.com/ are decent sources for technical definitions.)

Salary Calculator

SalaryCalculator.exe

• Design a form that allows the user to enter the name, hourly wage and number of hour worked for an employee.
• When the button is clicked the program should calculate the weekly salary of the employee and make the text for a check in the textbox below.
• Use a Try-Catch statement to make sure the user has entered numbers for the hours and the wage. Pop up a messagebox (and exit the subroutine) if the user
• does not enter a number. 
• If the hourly wage is below Minimum Wage (let's use $5.85), a messagebox should appear indicating the problem.
• If the user enters a negative number for the number of hours, a message box should appear indicating the problem. 
• If the employee worked more than 40 hours, he or she should receive time and a half for the hours exceeding 40. For example if one works 36 hours at $6.00 an hour, one will receive 216 = 36*6 dollars; but if one works 44 hours at $6.00 an hour, one will receive 276 = 40*6 + (44-40)*6*1.5 dollars.
• Clear out the "check" area if the user changes any of the information above.
• The "check" above is a multiline TextBox.
• The date was written using the code Now.Date
• To move to a the beginning of a new line, concatenate the constant VbCrLf (Visual Basic Carriage Return Line Feed) to the string.
• For a tab, use the constant VbTab.
• Suppose Salary is a variable holding an amount of money to be paid to an employee.  You can use the code Format(Salary,"Currency") to print out the number in a way that looks like money.

Due: Sept. 10

• Monday

  
  Labor Day Holiday
  
  

• Wednesday

  
  MathOddity3Zip.zip (includes IsNumeric() and Try-Catch block)
  
  

• Thursday

  
  

  Create a program that has the user guess a number.

  
  • Declare and assign a variable equal to some number between 1 and 100. (We will do better later when we learn how to make the computer choose a number "at random.") You can do this "globally" by including a statement like
    
    Dim Target As Integer = 57
    
    below the Public Class Whatever line near the top but not within any subroutine.
  • The user enters his or her guess in the textbox provided (which is right justified).
  • The user then clicks the Check button.
  • Do not proceed with the guess if it is not a number.
  • Do not proceed with a guess if it is not between 1 and 100.
  • The program then determines the progress of guessing. The program reports the guess and if it is too high or too low. If the guess matches the number, display a MessageBox as well as the progress.
  • The progress displays the entire history of guessing. (You need to take what's in the TextBox, add something new to it, and place that result back into the TextBox.  The statement is simple looking, but new programmers often find it difficult to come to terms with.)
  • After each guess, the textbox should be cleared out for the user to enter the next guess.
  • (Not shown above) Count the number of guesses the user has made.  Declare a "global" variable for the count.  But don't use Count as your variable name (it is a reserved word); use something like GuessCount. Add 1 to the variable for each guess.   
  • If the count is less than or equal to 5 when the user guesses correctly, have your MessageBox say something like "Hey, you're good at this"; and if the count is more than 10, have your MessageBox say something like "You can do better than that."
  
  
  

• Friday

  
  StuffZip.zip (Now.Date and some concatenation)
  ClassDeterminationZip.zip (introduces the ElseIF structure)