// Ex3_12.cpp
  // Using a while loop to compute an average
  include <iostream>
  
  using std::cin;
  using std::cout;
  using std::endl;
  
  int main()
  {
     double value = 0.0;              // Value entered stored here
     double sum = 0.0;                // Total of values accumulated here
     int i = 0;                       // Count of number of values
     char indicator = 'y';            // Continue or not?
  
     while(indicator == 'y')          // Loop as long as y is entered
     {
        cout << endl
             << "Enter a value: ";
        cin >> value;                 // Read a value
        ++i;                          // Increment count
        sum += value;                 // Add current input to total
  
        cout << endl
             << "Do you want to enter another value (enter n to end)? ";
        cin >> indicator;             // Read indicator
     }
  
     cout << endl
          << "The average of the " << i
          << " values you entered is " << sum/i << "."
          << endl;
     return 0;
  }