#include<iostream>
#include<cmath>
using namespace std

int main()
{
      float radius;
      float circumference;
      float area;

      cout << "Please enter the radius of the circle: ";
      cin >> radius;
      cout << endl;

      circumference = 2 * 3.1416 * radius;
      area = 3.1416 * radius * radius;

      cout << "Radius = " << radius << endl;
      cout << "Area = " << area << endl;
      cout << "circumference = " << circumference << endl;
}