Some drinks are sold in four-packs instead of six-packs. How would you change th

Question

Some drinks are sold in four-packs instead of six-packs. How would you change the following program to compute the total volume for four-packs instead of six-packs?
/*
      CanVolCalc ; number, number

      program calculates and outputs, in liters:
          1. the volume of a six-pack of 12-ounce cans
          2. the volume of a six-pack of 12-ounce cans and a 2-liter bottle

      program assumes the volume of a can is 12 ounces (0.355 liter)
*/
public class CanVolCalc
{
   public static void main(String[] args)
   {
      int cansPerPack = 6;
    final double CAN_VOLUME = 0.355; // Liters in a 12-ounce can
    double totalVolume = cansPerPack * CAN_VOLUME;
      
    System.out.print("A six-pack of 12-ounce cans contains ");
    System.out.print(totalVolume);
      System.out.println(" liters.");

      final double BOTTLE_VOLUME = 2; // Two-liter bottle
      
    totalVolume = totalVolume + BOTTLE_VOLUME;
      
    System.out.print("A six-pack and a two-liter bottle contain ");
    System.out.print(totalVolume);
    System.out.println(" liters.");
   }
}

Explanation / Answer

public class CanVolCalc {

   public static void main(String[] args) {
   int cansPerPack = 6;
   final double CAN_VOLUME = 0.355; // Liters in a 12-ounce can
   double totalVolume = cansPerPack * CAN_VOLUME;
   System.out.println("------------------------------------------");
   System.out.println("**********Calculation for six-packs***********");
   System.out.print("A six-pack of 12-ounce cans contains ");
   System.out.print(totalVolume);
   System.out.println(" liters.");

   final double BOTTLE_VOLUME = 2; // Two-liter bottle
  
   totalVolume = totalVolume + BOTTLE_VOLUME;
  
   System.out.print("A six-pack and a two-liter bottle contain ");
   System.out.print(totalVolume);
   System.out.println(" liters.");
  
   /**
   * for four pack method call
   */
   System.out.println("------------------------------------------");
   System.out.println("**********Calculation for four-packs***********");
   canVolCalfor4Pack(4,2);//first parameter is cans Per Pack and 2nd parameter is bottle volume in ltr
   }

   private static void canVolCalfor4Pack(int cansPerPack, double BOTTLE_VOLUME) {
       // TODO Auto-generated method stub
      
   final double CAN_VOLUME = 0.355; // Liters in a 12-ounce can
   double totalVolume = cansPerPack * CAN_VOLUME;
  
   System.out.print("A four-pack of 12-ounce cans contains ");
   System.out.print(totalVolume);
   System.out.println(" liters.");

  
   totalVolume = totalVolume + BOTTLE_VOLUME;
  
   System.out.print("A four-pack and a two-liter bottle contain ");
   System.out.print(totalVolume);
   System.out.println(" liters.");
   }

}

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