Question

PLEASE DO IN C# AND MAKE SURE I CAN COPY CODE INTO VISUAL STUDIO

Exercise#1:DesignandimplementclassCircletorepresentacircleobject.Theclassdefinesthefollowingattributes(variables)andmethods:

1. Aprivatevariableoftypedoublenamedradiustorepresenttheradius.Setto
2. Constructor Methods:
   • Python : Anoverloaded constructormethodtocreateadefaultcircle.
   • C# & Java: Default Constructor with no arguments.
   • C# & Java: Constructormethodthatcreatesacirclewithuser-specifiedradius.
3. MethodgetRadius()thatreturnstheradius.
4. MethodsetRadius()thatsetstheradius.
5. MethodgetArea()thatreturnsthearea.
6. MethodgetPerimeter()thatreturnstheperimeter.
7. MethodtoString()toprintoutameaningfuldescriptionofthecircleasfollows:

ThecirclehasradiusX.     WhereXisthevalueofvariableradius.

Nowdesignandimplementatestprogramtocreateadefaultcircleobjectandtestallclassmethodsontheobject.Printtheobjectaftereachmethodcallandusemeaningfullabelforeachmethodcallasshowninthefollowingsamplerun.

Samplerun:

Printradius:

Theradiusis1.

Printarea:

Theareais3.14

Printperimeter:

Theperimeteris6.28

Setradiusto10andprinttheobject:Thecirclehasradius10.

Printarea:

Theareais314.23

Printperimeter:

Theperimeteris62.81

Answer 1

SOURCE CODE:

using System;
public class Circle
{
private double radius;
public Circle() //Constructor
{
radius=0.0;
}
public Circle(double r) //Constructor parameterised
{
radius=r;
}
public double getRadius()
{
return radius;
}
public void setRadius(double r)
{
radius=r;
}
public double getArea()
{
return radius*radius*3.14;
}
public double getPerimeter()
{
return 2*3.1459*radius;
}
public void toString()
{
Console.WriteLine("The Circle has radius {0}. Where {1} is the value of variable radius.",radius,radius);
}
}
class HelloWorld // Class to implement above class.

{
static void Main() {
Circle c1=new Circle(1.0); // Creating class object.
Console.WriteLine("Print radius:");
Console.WriteLine("The radius is {0}.",c1.getRadius());
Console.WriteLine("Print Area:");
Console.WriteLine("The area is {0}.",Math.Round(c1.getArea(),2));
Console.WriteLine("Print getPerimeter:");
Console.WriteLine("The area is {0}.",Math.Round(c1.getPerimeter(),2));
Console.Write("Set radius to 10.");
c1.setRadius(10.0);
Console.WriteLine("The Circle has radius {0}.",c1.getRadius());
Console.WriteLine("Print Area:");
Console.WriteLine("The area is {0}.",Math.Round(c1.getArea(),2));
Console.WriteLine("Print getPerimeter:");
Console.WriteLine("The area is {0}.",Math.Round(c1.getPerimeter(),2));
  
}
}
OUTPUT