Write a complete C++ program in one file here that asks the user to enter a radius for a circle then calculates and prints its' area. The area should be calculated using the formula area = 3.14 * radius * radius. You must have a class called Circle that stores the radius as a double value and can calculate its' own area via a method called calcArea that takes no parameters and returns the area

#include <iostream>

using namespace std;

class Circle{

 public:    

   double radius;

 Circle(double r) {

     radius = r;

 }

 double calcArea() {

     return 3.14 * radius * radius;

 }

};

int main()

{

   double radius;

   cout<<"Enter the radius: ";

   cin >> radius;

   Circle ob = Circle(radius);

   cout << ob.calcArea() << endl;

   return 0;

}

Explanation:

Create a class called Circle that has one variable, radius

Create a constructor that takes one parameter, radius

Create a method called calcArea that calculates and returns the area of a circle using given formula

In the main:

Ask the user for the radius

Create an object for Circle with given radius

Call calcArea method to calculate the area, and print the result

a  social news website  is an  internet  website  that features  user-posted stories. such stories are ranked based on popularity, as voted on by other users of the site or by website administrators. users typically comment online on the news posts and these comments may also be ranked in popularity. since their emergence with the birth of  web 2.0, social news sites have been used to link many types of information, including news, humor, support, and discussion. all such websites allow the users to submit content and each site differs in how the content is moderated. on the  slashdot  and  fark  websites,  administrators  decide which articles are selected for the front page. on  reddit  and  digg, the articles that get the most votes from the community of users will make it to the front page. many social news websites also feature an online comment system, where users discuss the issues raised in an article. some of these sites have also applied their voting system to the comments, so that the most popular comments are displayed first. some social news websites also have a  social networking  function, in that users can set up a user profile and follow other users' online activity on the website.