#include <iostream>
#include <cstdlib>
using namespace std;

class Circle
{
private:
    float radius;     // data member
public:
    void setRadius(float value); // member function declaration,  function prototype
    float getRadius() const;   // const member function
    float area() const;
};


int main()
{
    Circle c;
    c.setRadius(18.5);
    cout << c.getRadius() << endl;

    Circle d;
    d.setRadius(17.5);
    cout << d.getRadius() << endl;

    Circle array[10];
    for (int i = 0; i < 10; i++)
    {
       array[i].setRadius(static_cast<float>(rand() % 10 + 1));
       cout << array[i].getRadius() << "   " << array[i].area() << endl;
    }
}

// member function definition
 void Circle::setRadius(float value)
 {
    radius = value;
 }

float Circle::getRadius() const
{
   return radius;
}

float Circle::area() const
{
  // float temp;
  // temp = 3.14 * radius * radius;
  // return temp;
   return 3.14 * radius * radius;
}