COMP 125: Introductory Programming

Part I (10 points)

Determine the output displayed in the picture box when the command button is clicked (assume that the responses are 7 and 11):

  Private Sub cmdDisplay_Click()


      Dim  a  As Single, b  As Single


      Let a = Val(InputBox("Enter a number"))

	
      Let b = Val(InputBox("Enter another number"))


      If  a  >  b  then


         Let a = a + 1


      else


         Let b = b + 1


      End If


      picResults.Print a; b


  End Sub

Part II (10 points)

Identify the error in the following program segment:

    Private Sub cmdDisplay_Click()


      Dim j As Single, k As Single


      Rem Display "OK" if either j or k equals 5


      Let j = 2


      Let k = 3


      If  j = 5  Or  k   Then


          picResults.Print "OK"


      End If


    End Sub

Part III (30 points)

In the following program segment, simplify the code.

  Private Sub cmdDisplay_Click()
    Dim a As Single, b As Single

    PicResults.Cls

    Let a = Val(InputBox("Enter a number"))
    Let b = Val(InputBox("Now enter another number"))
    Let c = Val(InputBox("And now just one more number"))    

    If  a  < b  then
        If  b  <  c  Then
            picResults.print b: "is between"; a; "and"; c
        End If   
    End If
  
  End Sub

Part IV (50 points)

• Item A:

  Write a program will accept an integer, check to see if the number read in is:

  • a negative number,
  • zero, or
  • a positive number, and if it is positive, whether it is even or odd.

  After your program makes the determination of what kind of number it is then it should print out the number read in and an appropriate message describing the number.

  Your program should use either a text box or an input box for input and a picture box to display the result.

• Item B:

  Review the following table showing the location of books in the library stacks according to their call numbers.

      100 to 199                      lower level
  
  
      200 to 500 and over 900         main floor
  
  
      501 to 900 except 700 to 750    upper floor
  
  
      700 to 750                      archives
  

  Write a program that requests the call number of a book (as an integer) as input and displays the location of the book. Use a select case block to implement the determination of location.

  Your program should use either a text box or an input box for input and a picture box to display the result.

Do you have any questions, comments or suggestions? If so, please e-mail them to me at jcorlis@luc.edu.

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Jack Corliss
Mathematical and Computer Sciences
Loyola University Chicago
Revised: 15 Janaury 1999