Question

Given the below UML diagram, convert the diagram into working java code. Pay attention to the constructors of the class "Circle". Circle radius: 2 pi Circle() circle (float) getRadius(): float getArea(): float getDiameter(): float 1. The no-argument constructor initiates "pi" to 3.14 2. The one argument constructor initiates variable "radius" to the value of parameter passed 3. getRadius (), returns the radius of the Circle. 4. get Area (), returns the area of the Circle. 5. getDiameter(), returns the diameter of the Circle. In the main(), create an object called "wheel" of type Circle. Trigger the no-argument constructor. Obtain and print the Radius, Diameter and Area of "wheel". Screen Output: The radius of the Circle is: 2 The Area of the Circle is: 12.56 The Diameter of the Circle is: 4 In the main(), create an object called "Farris wheel" of type Circle by triggering the one- argument constructor. A user defined radius (as input) is obtained from the console and passed as argument to the one argument constructor. This user defined radius should replace the default value of the variable radius. Obtain and print the Radius, Diameter and Area of the "Farris wheel". Screen Output: Enter radius of Circle: 3 The radius of the Circle is: 3 The Area of the Circle is: 28.26 The Diameter of the Circle is: 6

Answer 1

Thanks for the question. Below is the code you will be needing. Let me know if you have any doubts or if you need anything to change.

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Thank You !
===========================================================================

#include<iostream>
using namespace std;

class Circle{
  
   private:
       float radius;
       float pi;
      
   public:
       Circle();
       Circle(float);
       float getRadius();
       float getArea();
       float getDiameter();
};

Circle::Circle(): radius(2),pi(3.14){}
Circle::Circle(float r):radius(r), pi(3.14){}
float Circle::getRadius(){return radius;}
float Circle::getArea(){return pi*radius*radius;}
float Circle::getDiameter(){return 2*radius;}

int main(){

   Circle wheel;
   float r;
   cout<<"The radius of the Circle: "<<wheel.getRadius()<<endl;
   cout<<"The Area of the Circle: "<<wheel.getArea()<<endl;
   cout<<"The Diameter of the Circle: "<<wheel.getDiameter()<<endl<<endl;
  
  
   cout<<"Enter radius of Circle: "; cin>>r;
  
   Circle Farris_wheel(r);
   cout<<"The radius of the Circle: "<<Farris_wheel.getRadius()<<endl;
   cout<<"The Area of the Circle: "<<Farris_wheel.getArea()<<endl;
   cout<<"The Diameter of the Circle: "<<Farris_wheel.getDiameter()<<endl<<endl;

   return 0;
}
=================================================================

i 2 #include<iostream> using namespace std; 9 class Circle C:\Users\User\Documents\Circels.exe The radius of the Circle: 2 The Area of the Circle: 12.56 The Diameter of the Circle: 4 private : float radius; float pi; Enter radius of Circle: 3 The radius of the Circle: 3 The Area of the Circle: 28.26 The Diameter of the Circle: 6 public: Circle(); Circle (float); float getRadius(); float getArea(); float getDiameter(); Process exited after 2.811 seconds with return value o Press any key to continue ... Circle::Circle(): radius (2),pi (3.14){} Circle::Circle (float r):radius (r), pi(3.14) { } float Circle::getRadius () { return radius; } float Circle::getArea() {return pi*radius*radius; } float Circle::get Diameter() {return 2*radius;} 21 22 249 int main() { H: Compiler Resources dh Compile Log Debug Find Results Close Abort Compilation - Errors: 0 - Warnings: 0 Output Filename: C:\Users\User\Documents\Circels.exe - Output Size: 1.83339405059814 MiB Compilation Time: 3.613 Shorten compiler paths Line: 28 Col: 65 Sel: 0 Lines: 42 Length: 1001 Insert Done parsing in 0.016 seconds