// Ex3_10.cpp
  // Using an infinite for 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 = 'n';            // Continue or not?
  
     for(;;)                          // Infinite loop
     {
        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
        if ((indicator == 'n') || (indicator == 'N'))
           break;                     // Exit from loop
     }
  
     cout << endl
          << "The average of the " << i
          << " values you entered is " << sum/i << "."
          << endl;
     return 0;
  }