C++ Programming Write a Circle class that has the following member variables: •
ID: 2246783 • Letter: C
Question
C++ Programming
Write a Circle class that has the following member variables:
• radius : a double
• pi : a double initialized with the value 3.14159
The class should have the following member functions:
• Default Constructor. A default constructor that sets radius to 0.0.
• Constructor. Accepts the radius of the circle as an argument.
• setRadius. A mutator function for the radius variable.
• getRadius. An accessor function for the radius variable.
• getArea. Returns the area of the circle, which is calculated as
area = pi * radius * radius
• getDiameter. Returns the diameter of the circle, which is calculated as
diameter = radius * 2
• getCircumference. Returns the circumference of the circle, which is calculated as
circumference = 2 * pi * radius
* Create 2 Circle objects (one using default constuctor, one by passing in a non 0, positive arugment, using non-pointer circle variables. Call the getArea, getDiameter and getCircumference methods and diplay the results.
* Write a destructor that simply has a cout statement noting the circle is being destroyed
* Create a pointer to a Circle, create a new Circle object with a non zero positive radius and set the pointer to point to it.
* delete the memory for this newly created circle (you should see the destructor message when running)
* Call the circle get Area, Diameter and Circumference methods using the pointer to a circle and display the results.
Write a program that demonstrates the Circle class by asking the user for the circle’s
radius, creating a Circle object, and then reporting the circle’s area, diameter, and
circumference.
Explanation / Answer
public class Circle
{
double Radius;
final double PI = 3.14159;
String input;
public Circle(double Radius, final double PI = 3.14159 )
{
this.Radius = Radius;
this.PI = 3.14159;
}
public Circle(double Radius, String input)
{
this.Radius = Radius;
}
public void setRadius(String input)
{
this.Radius = Radius;
}
public void getRadius()
{
return(Radius);
}
public void getArea()
{
return(Area);
}
public void getDiameter()
{
return(Diameter);
}
public void getCircumference()
{
return(Circumference);
}
public static void main(String[] args)
{
}
}
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