// This program calculates the charges for DVD rentals.
// Every third DVD is free.
#include <iostream>
#include <iomanip>
using namespace std;

int main()
{
   int dvdCount = 1;    // DVD counter
   int numDVDs;         // Number of DVDs rented
   double total = 0.0;  // Accumulator
   char current;        // Current release, Y or N

   // Get the number of DVDs.
   cout << "How many DVDs are being rented? ";
   cin >> numDVDs;
   
   // Determine the charges.
   do
   {
      if ((dvdCount % 3) == 0)
      {
         cout << "DVD #" << dvdCount << " is free!\n";
         continue;  // Immediately start the next iteration
      }
      cout << "Is DVD #" << dvdCount;
      cout << " a current release? (Y/N) ";
      cin >> current;
      if (current == 'Y' || current == 'y')
         total += 3.50;
      else
         total += 2.50;
   } while (dvdCount++ < numDVDs);
   
   // Display the total.
   cout << fixed << showpoint << setprecision(2);
   cout << "The total is $" << total << endl;
   return 0;
}