// The Monthly sales example from Lewis and Loftus
// (first edition, page 217) modified. The program
// keeps track of 5 consequtive years sales (class
// Sales_Results define each one of 5-year frame),
// and provides different services such as:
//   -- identifying the best year;
//   -- total sales for each year;
//   -- avarage sales per month for a specific year, etc.

class Sales2 {

   public static void main (String[] args) {

     Sales_Results sales = new Sales_Results(); 
    
     System.out.println ("Comparison Report (2000 -- 2004)");
     System.out.println ("--------------------------------");

     System.out.println ("Total sales for 2000: " + sales.sales2000.total());
     System.out.println ("Avarage sales for 2000: " + sales.sales2000.average ());
     System.out.println ("Total sales for 2001: " + sales.sales2001.total());
     System.out.println ("Avarage sales for 2001: " + sales.sales2001.average ());
     System.out.println ("Total sales for 2002: " + sales.sales2002.total());
     System.out.println ("Avarage sales for 2002: " + sales.sales2002.average ());
     System.out.println ("Total sales for 2003: " + sales.sales2003.total());
     System.out.println ("Avarage sales for 2003: " + sales.sales2003.average ());
     System.out.println ("Total sales for 2004: " + sales.sales2004.total());
     System.out.println ("Avarage sales for 2004: " + sales.sales2004.average ());
     sales.display_best();
   }
}

// Instantiates array total_sales which contains sales results for 
// the last 5 full years.

class Sales_Results {

     int[] revenue2000 = {0, 1678, 2345, 6543, 2367, 4431, 2789,
                          3452, 3377, 4576, 6665, 5678, 3456};

     int[] revenue2001 = {0, 3678, 1345, 6243, 4367, 3431, 7789,
                          3492, 3567, 3676, 2395, 2618, 3356};

     int[] revenue2002 = {0, 3456, 7755, 6343, 4367, 5431, 1789,
                          1232, 4577, 4366, 2265, 2378, 10456};

     int[] revenue2003 = {0, 1622, 2349, 6112, 2698, 4231, 4789,
                          4352, 2677, 5676, 3365, 7778, 3756};

     int[] revenue2004 = {0, 5678, 4345, 3543, 5667, 2331, 3589,
                          3652, 3177, 3576, 6265, 4578, 6556};

     Monthly_Sales2 sales2000 = new Monthly_Sales2 (revenue2000);
     Monthly_Sales2 sales2001 = new Monthly_Sales2 (revenue2001);
     Monthly_Sales2 sales2002 = new Monthly_Sales2 (revenue2002);
     Monthly_Sales2 sales2003 = new Monthly_Sales2 (revenue2003);
     Monthly_Sales2 sales2004 = new Monthly_Sales2 (revenue2004);

// Array total_sales is an array of objects, where each object
// is an array in turn.

     int [] total_sales = {sales2000.total(), sales2001.total(),
            sales2002.total(), sales2003.total(), sales2004.total()};
     int best_total, best_year, year;

// To find the best year, we need method display_best

   public void display_best () {

     best_total = total_sales[0];
     best_year = 2000;
     year = 2000;
     for (int count = 1; count <= 4; count++) {
       if (best_total < total_sales[count]) {
          best_total = total_sales[count];
          best_year = year;
          year = year + 1;
          }
       else
          year = year + 1;
     }
     System.out.println ("The best revenue was " + best_total + " in " + best_year);
     System.out.println ();
         
   }
} 

class Monthly_Sales2 {

   private final int JANUARY = 1;
   private final int DECEMBER = 12;
   int [] revenue;

// We need a constructor to create objects of this class.

   public Monthly_Sales2 (int[] sales) {
     revenue = sales;
   }

   public int total () {
     int sum = 0;
     for (int month = JANUARY; month <= DECEMBER; month++)
        sum = sum + revenue[month];
     return sum;
   }

   public int average () {
     return total()/DECEMBER;
   }

   public int highest_month () {
     int highest = JANUARY;
     for (int month = JANUARY + 1; month <= DECEMBER; month++)
       if (revenue[month] > revenue[highest])
          highest = month;
     return highest;
   }

   public int months_revenue (int month) {
     return revenue[month];
   }

   public void print_table () {
     System.out.println ("Month\tSales");
     for (int month = JANUARY; month <= DECEMBER; month++)
       System.out.println ("  " + month + "\t" + revenue[month]);
     System.out.println ();
   }
}