Before:

// Dealing cards during a card game
cout << "Do you want another card?" << endl;
cin >> reply;

if( 'y' == reply )
{
   do
   {
      nextCard = rand() % 13 + 1;
      cout << "Your next card is " << nextCard << endl;

      cout << "Do you want another card?" << endl;
      cin >> reply;

   } while( 'y' == reply );
}

// Dealing cards during a card game
do
{
   cout << "Do you want another card?" << endl;
   cin >> reply;

   if( 'y' == reply )
   {
      nextCard = rand() % 13 + 1;
      cout << "Your next card is " << nextCard << endl;
   }
} while( 'y' == reply );