C++ double type Calculate Averages

#include <iostream>
using namespace std;
int main()//from  ww w  .jav  a 2s .c om
{
   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;
}