// This class uses simple variables to represent the frequency counts.
// Barry Cornelius, 19 June 2000
import java.io. BufferedReader;
import java.io. IOException;
public class VendingMachine
{
   private BufferedReader iKeyboard;
   private int iBlackWithout;
   private int iBlackWith;
   private int iWhiteWithout;
   private int iWhiteWith;
   public VendingMachine(final BufferedReader pKeyboard)
   {
      iKeyboard = pKeyboard;
   }
   public void setFrequencyCountsToZero()
   {
      iBlackWithout = 0;
      iBlackWith = 0;
      iWhiteWithout = 0;
      iWhiteWith = 0;
   } //BJCHEREFIRST
   public void readInSelectionsAndUpdateFrequencyCounts()
                                                 throws IOException
   {
      while (true)
      {
         final String tLine = iKeyboard.readLine();
         if (tLine.equals(""))
         {
            break;
         }
         final int tDrinkSelection = Integer.parseInt(tLine);
         switch (tDrinkSelection)
         {
            case 1:
            {
               iBlackWithout += 1;
            }
            break;
            case 2:
            {
               iBlackWith += 1;
            }
            break;
            case 3:
            {
               iWhiteWithout += 1;
            }
            break;
            case 4:
            {
               iWhiteWith += 1;
            }
            break;
            default:
            {
               System.out.println("The value is out of range");
               System.exit(1);
            }
         }
      }
   } //BJCHERECONT
   public void outputFrequencyCounts()
   {
      System.out.println("Black (no sugar): " + iBlackWithout);
      System.out.println("Black with sugar: " + iBlackWith);
      System.out.println("White (no sugar): " + iWhiteWithout);
      System.out.println("White with sugar: " + iWhiteWith);
   }
}