C++ double type Read from console

#include <iostream>
using namespace std;
int main()//from  w  w  w .  ja  va2 s.  c o m
{
   const int SIZE = 6;             //size of array
   double sales[SIZE];             //array of 6 variables
   cout << "Enter widget sales for 6 days\n";
   for(int j=0; j<SIZE; j++)       //put figures in array
      cin >> sales[j];
   double total = 0;
   for(j=0; j<SIZE; j++)           //read figures from array
      total += sales[j];           //to find total
   double average = total / SIZE;  // find average
   cout << "Average = " << average << endl;
   return 0;
}

#include <iostream>

int main() {/*from   w  ww  .  ja  v a 2s  .c om*/
  const int inches_per_foot {12};

  double shelf_length {};
  double shelf_depth {};
  double pool_size {};

  std::cout << "Enter length (feet): ";
  std::cin >> shelf_length;

  std::cout << "Enter depth (feet): ";
  std::cin >> shelf_depth;

  std::cout << "Enter length of the side of a pool (inches): ";
  std::cin >> pool_size;

  long pools {static_cast<long>((shelf_length * inches_per_foot) / pool_size) * static_cast<long>((shelf_depth * inches_per_foot) / pool_size)};

  std::cout << "The number of pools that can be contained in a single layer is " << pools << std::endl;
}