Chapter 10, Problem 2PP

Program Plan Intro

CAR Class

Program plan:

Design the form:

• Place one label box control on the form, and change its name and properties.
• Place two button controls on the form, and change its name and properties to retrieve the object properties and then display the values in message box.

In code window, write the code:

Program.cs:

• Include the required libraries.
• Define the namespace “Program10_2”.
  • Define a class “Program”.
    • Define a constructor for the class.
    • Define required functions to run “Form1”.

Form1.cs:

• Include the required libraries.
• Define namespace “Program10_2”.
  • Define a class “Form1”.
  • Create an object for Car derived class.
  • In button1_Click() method,
    • Assign the text box input to field of base class using derived class object.
    • Display the retrieved fields in message box.
  • In button2_Click() method,
    • Assign the text box input to field of base class using derived class object.
    • Display the retrieved fields in message box.
  • Close the application.

Car.cs:

• Include the required libraries.
• Define namespace “Program10_2”.
  • Define a base class “Car”.
    • Declare the required fields.
    • Define the parameter constructor.
    • Define Year, Make, Model, and Speed property to use get and set methods.
    • Define an Accelerate () method.
      • Increment the value of speed by 5 and initialize it.
    • Define a Brake () method.
      • Check whether the value of speed is less than or equal to 0 or not. If yes, then initialize the value of speed as 0.
      • Otherwise, decrement the value of speed by 5 and initialize it.

Form Design:

View the Form Design in IDE.

Set the Form Control properties in Properties window as follows:

Object	Property	Setting
Form1	Text	Program 10_2
label1	Text	(Empty)
button1	Text	Accelerate
button2	Text	Brake

• Add one label box control to the form from Toolbox.
• Add two button controls to the form from Toolbox.