// Properties of spheres of radii 1, 3, and 7 using arrays
#include <iostream>
#include <math.h>
using namespace std;
const double pi = 3.1416;
const int N=3; // no. of spheres
double r[N] =   {1., 3., 7.}; // radii of spheres

int main()  
{
  double area[N], volume[N]; // arrays for area and volume

  for (int i=0; i<N; ++i){
    area[i] = 4. * pi * pow(r[i], 2.);
    volume[i] = 4./3. * pi * pow(r[i], 3.);
    cout << r[i] << ' ' << area[i] << ' ' << volume[i] << endl;
  }
}