Computer Programming Concepts and Visual Basic David I. Schneider

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98 Computer Programming Concepts and Visual Basic FIGURE 3-8 Sample Run for Programming Project 1 2. About seven million notebook computers were sold during 1997. Table 3.2 gives the market share for the four largest vendors. Write a program that displays the number of computers sold by each of the Big Four. The input and output should be handled by Sub procedures and the number of computers calculated by a Function procedure. TABLE 3.2 1997 Market Shares of the Top Notebook Vendors Source: PC Magazine, January 20, 1998. Company Market Share Toshiba 20% IBM 11% Compaq 9% Dell 6% 3. Table 3.3 gives the advertising expenditures (in millions of dollars) for the four most advertised soft drink brands during the first nine months of 1995 and 1996. Write a program that displays the percentage change in advertising for each brand. Sub procedures should be used for input and output and the percentage change should be computed with a Function procedure. Note: The percentage change is 100 * ([1996 expenditure] – [1995 expenditure]) / [1995 expenditure]. TABLE 3.3 Most Advertised Soft Drinks Brand 1995 Expenditure 1996 Expenditure Coca-Cola classic 60.7 121.6 Pepsi-Cola 94.8 83.0 Diet Coke 43.7 70.0 Dr. Pepper 46.3 51.8 Source: Beverage World, March 1997. 4. A fast-food vendor sells pizza slices ($1.25), fries ($1.00), and soft drinks ($.75). Write a program to compute a customer’s bill. The program should request the quantity of each item ordered in a Sub procedure, calculate the total cost with a Function procedure, and use a Sub procedure to display an itemized bill. A sample output is shown in Figure 3-9.
FIGURE 3-9 Sample Run for Programming Project 4 5. Write a program to generate a Business Travel Expense attachment for an income tax return. The program should request as input the name of the organization visited, the date and location of the visit, and the expenses for meals and entertainment, airplane fare, lodging, and taxi fares. (Only 50% of the expenses for meals and entertainment are deductible.) A possible form layout and run are shown in Figures 3.10 and 3.11, respectively. Sub procedures should be used for the input and output. FIGURE 3-10 Form with Sample Data for Programming Project 5 Business Travel Expense Trip to attend meeting of Association for Computing Machinery February 25–28 in Atlanta Meals and entertainment $190.10 Airplane fare $210.15 Lodging $475.35 Taxi fares $35.00 Total other than Meals and Entertainment: $720.50 50% of Meals and Entertainment: $95.05 FIGURE 3-11 Output on Printer for Sample Run of Programming Project 5 Programming Projects 99
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Computer Programming Concepts and V
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CONTENTS SECTION 1: PROBLEM SOLVING
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13.3 WEB PAGE PROGRAMMING WITH VBSC
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S E C T I O N 1 PROBLEM SOLVING
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4 Computer Programming Concepts and
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10 Computer Programming Concepts an
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S E C T I O N 2 FUNDAMENTALS OF PRO
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Page 81 and 82: 3.1 SUB PROCEDURES, PART I Structur
Page 83 and 84: The second task performed by the ad
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Page 89 and 90: dure by just using the variable in
Page 91 and 92: Call CalculateSum(x, y, s) Call Dis
Page 93 and 94: ■ FORM-LEVEL VARIABLES Visual Bas
Page 95 and 96: 3. In Appendix D, the section “St
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Page 115 and 116: SOLUTION: In the following program,
Page 117 and 118: The Else part of an If block can be
Page 119 and 120: picTax.Cls picTax.Print “Your FIC
Page 121 and 122: Case 4, 5 picOutcome.Print “You a
Page 123 and 124: EXAMPLE 3 The following program use
Page 125 and 126: Case Else picResult.Print “The st
Page 127 and 128: 4. The items in the value list must
Page 129 and 130: The hierarchy chart in Figure 4-4 s
Page 131 and 132: ‘Program to compute employees’
Page 133 and 134: Private Function TaxMarried(adjPay
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Page 137: S E C T I O N 5 REPETITION
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148 Computer Programming Concepts a
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S E C T I O N 6 ARRAYS
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S E C T I O N 7 SEQUENTIAL FILES
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S E C T I O N 8 RANDOM-ACCESS FILES
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S E C T I O N 9 THE GRAPHICAL DISPL
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10.1 LIST BOXES AND COMBO BOXES The
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Private Sub cmdAdd_Click() Dim item
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either typing in information or jus
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Private Sub cmdDisplay_Click() picF
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clicks on the square to toggle betw
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circle and the button is said to be
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hsbBar.Value changes accordingly. T
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THE SHAPE CONTROL The shape control
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FIGURE 10-9 A Picture Created with
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Rows 9 ScrollBars 0 - flexScrollBar
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Private Sub cmdQuit_Click() End End
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Here, the menu bar contains two men
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Clipboard.Clear deletes the content
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cedures that are available to all f
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The Flags property influences certa
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13. Additional forms serve as new w
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6. Voting Machine. The members of t
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11.1 AN INTRODUCTION TO DATABASES T
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9. Click on the down arrow to the r
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clicked or a Move, Update, Delete,
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Do While (Not foundFlag) And (Not d
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mary key. Databases of student enro
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question mark stands for a single c
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1995 populations. When the second c
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If a Find method does not locate a
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place an x in the check box next to
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population (in descending order). W
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Creating and Designing Databases 34
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9. When all fields have been specif
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Creating and Designing Databases 34
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TABLE 11.5(B) TABLE 11.5(C) course
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(a) Update the quantity field of th
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12.1 CLASSES AND OBJECTS noun A wor
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Task Statement Assign a value to a
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EXAMPLE 1 and then an instance of t
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[Run, enter the data for a student
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SOLUTION: Object Property Setting f
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4. Methods can be either Function o
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‘Student Class (CStudent) Private
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txtFinal.Text = “” picGrades.Pr
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■ EVENTS In the previous section
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frmCircles.ForeColor = vbRed ‘Mak
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Public Function X() As Integer X =
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End Sub Private Sub cmdDropBomb_Cli
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Next i End Sub Public Function Read
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Remove method. The number of object
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S E C T I O N 13 COMMUNICATING WITH
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A P P E N D I C E S
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APPENDIX C VISUAL BASIC STATEMENTS,
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CANCEL The Cancel property provides
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COLS and ROWS The Cols and Rows pro
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DEFINT, DEFLNG, DEFSNG, DEFDBL, DEF
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ENVIRON Visual Basic has an environ
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FONT.ITALIC or FONTITALIC These pro
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yields “1234.”, Format(1234000,
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the length of the string currently
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ISNUMERIC The value of the function
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Unlock statement is used to remove
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Focus Default Default Number First
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OR (Logical Operator) The logical e
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the same as in the original Dimensi
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SECOND The function Second extracts
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STRETCH When the Stretch property o
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UNLOCK The Unlock command is intend
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[COLOR]: Numbers written in base 16
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Appendix D 457
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466 Technology of the Internet D Da
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468 Technology of the Internet Rela
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470 Technology of the Internet 2. D
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SYSTEM REQUIREMENTS CD-ROM INSTRUCT
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Computer Programming Concepts and Visual Basic David I. Schneider

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