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Engineering Computer Science Programming with Microsoft Visual Basic 2017

Program Plan 1. Variables mentioned below are used: prop − Instance created for the class Rectangle. area −a variable that holds the area of the rectangular portion. widthTxt − Textbox that gets the width of the rectangular portion. lengthTxt − Textbox that gets the length of the rectangular portion. priceTxt − Textbox that gets the price of laying sod for one square yard. totalpriceTxt − Textbox that displays the total cost of laying sod on property. 2. Functions mentioned below are used: btnCalculate.Click()-Called when the user clicks Calculate button in Gui and calls the function GetArea() of class Rectangle to calculate the area of a rectangular piece of property. btnExit_Click()-Called when a user clicks on the Exit button to close the application. Program Description: To create the interface as shown in the given figure and to code the application that uses the Integer as a data type for the length and width. Also, display the total price that must have a dollar sign with it and the value must be rounded off to 2 decimal places. Program: PublicClassForm1 PrivateSubbtnCalculate_Click(sender AsObject, e AsEventArgs) HandlesbtnCalculate.Click Dim prop AsNew Rectangle Dim area AsInteger Dim price, totalpriceAsDouble Integer.TryParse(widthTxt.Text, prop.Width) Integer.TryParse(lengthTxt.Text, prop.Length) Double.TryParse(priceTxt.Text, price) area = prop.GetArea area = area / 9 totalprice = price * area totalpriceTxt.Text = Convert.ToString(Format(totalprice, "$00.00")) EndSub PrivateSubbtnExit_Click(sender AsObject, e AsEventArgs) HandlesbtnExit.Click Application.Exit() EndSub EndClass Form Design: The designed form is shown below: Sample output for an original program for the given values. When the program is just started, the following form will be loaded. When the user enters the values of length, width, and price per square yard and clicks the calculate button, the following output will be displayed. When the user selects an item from lstInvited and clicks on the Rejected button, then the following changes are made. When the user presses the Exit button, the application will quit. Explanation: This program is for reading the values of length, width, and price of laying sod in a rectangular piece of property. It then calculates the area of the rectangle by calling the function of another class file. Finally, the total cost of laying sod per square yard is calculated and displayed in the total price text box.

Program Plan 1. Variables mentioned below are used: prop − Instance created for the class Rectangle. area −a variable that holds the area of the rectangular portion. widthTxt − Textbox that gets the width of the rectangular portion. lengthTxt − Textbox that gets the length of the rectangular portion. priceTxt − Textbox that gets the price of laying sod for one square yard. totalpriceTxt − Textbox that displays the total cost of laying sod on property. 2. Functions mentioned below are used: btnCalculate.Click()-Called when the user clicks Calculate button in Gui and calls the function GetArea() of class Rectangle to calculate the area of a rectangular piece of property. btnExit_Click()-Called when a user clicks on the Exit button to close the application. Program Description: To create the interface as shown in the given figure and to code the application that uses the Integer as a data type for the length and width. Also, display the total price that must have a dollar sign with it and the value must be rounded off to 2 decimal places. Program: PublicClassForm1 PrivateSubbtnCalculate_Click(sender AsObject, e AsEventArgs) HandlesbtnCalculate.Click Dim prop AsNew Rectangle Dim area AsInteger Dim price, totalpriceAsDouble Integer.TryParse(widthTxt.Text, prop.Width) Integer.TryParse(lengthTxt.Text, prop.Length) Double.TryParse(priceTxt.Text, price) area = prop.GetArea area = area / 9 totalprice = price * area totalpriceTxt.Text = Convert.ToString(Format(totalprice, "$00.00")) EndSub PrivateSubbtnExit_Click(sender AsObject, e AsEventArgs) HandlesbtnExit.Click Application.Exit() EndSub EndClass Form Design: The designed form is shown below: Sample output for an original program for the given values. When the program is just started, the following form will be loaded. When the user enters the values of length, width, and price per square yard and clicks the calculate button, the following output will be displayed. When the user selects an item from lstInvited and clicks on the Rejected button, then the following changes are made. When the user presses the Exit button, the application will quit. Explanation: This program is for reading the values of length, width, and price of laying sod in a rectangular piece of property. It then calculates the area of the rectangle by calling the function of another class file. Finally, the total cost of laying sod per square yard is calculated and displayed in the total price text box.

Solution Summary: The author explains how to create the interface and code the application that uses the Integer as a data type for the length and width.

Programming with Microsoft Visual Basic 2017

Programming with Microsoft Visual Basic 2017

8th Edition

ISBN: 9781337102124

Author: Diane Zak

Publisher: Cengage Learning

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Programming with Microsoft Visual Basic 2017

Ch. 10 - The name of a class file ends with which of the...Ch. 10 - The Inventory class contains a Private variable...Ch. 10 - Prob. 4RQ Ch. 10 - Which of the following statements is false? a. A...Ch. 10 - A Private variable in a class can be accessed...Ch. 10 - Prob. 7RQ Ch. 10 - Which of the following is the name of the...Ch. 10 - Prob. 10RQ Ch. 10 - Prob. 11RQ Ch. 10 - Prob. 12RQ

Ch. 10 - Prob. 13RQ Ch. 10 - Prob. 16RQ Ch. 10 - Prob. 1E Ch. 10 - Open the Palace Solution.sln file contained in the...Ch. 10 - Prob. 3E Ch. 10 - Prob. 4E Ch. 10 - In this exercise, you modify the Grade Calculator...

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In this exercise, you modify the Grade Calculator application from this chapter’s Apply lesson. Use Windows to make a copy of the Grade Solution folder. Rename the copy Grade Solution-Intermediate. Open the Grade Solution.sln file contained in the Grade Solution-Intermediate folder. Open the CourseGrade.vb file. The DetermineGrade method should accept an integer that represents the total number of points that can be earned in the course. (Currently, the total number of points is 200: 100 points per test.) For an A grade, the student must earn at least 90% of the total points. For a B, C, and D grade, the student must earn at least 80%, 70%, and 60%, respectively. If the student earns less than 60% of the total points, the grade is F. Make the appropriate modifications to the DetermineGrade method and then save the solution. Unlock the controls on the form. Add a label control and a text box to the form. Change the label control’s Text property to “&Maximum points:” (without the quotation marks). Change the text box’s name to txtMax. Lock the controls and then reset the tab order. Open the form’s Code Editor window. The txtMax control should accept only numbers and the Backspace key. Code the appropriate procedure. The grade should be cleared when the user makes a change to the contents of the txtMax control. Code the appropriate procedure. Modify the frmMain_Load procedure so that each list box displays numbers from 0 through 200. Locate the btnDisplay_Click procedure. If the txtMax control does not contain a value, display an appropriate message. The maximum number allowed in the txtMax control should be 400; if the control contains a number that is more than 400, display an appropriate message. The statement that calculates the grade should pass the maximum number of points to the studentGrade object’s DetermineGrade method. Make the necessary modifications to the procedure. Save the solution and then start and test the application.
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