Question

/* What's wrong with this code?
(nothing actually - but let's fix it to use a repetition structure)
Copy and paste this .txt file into jGrasp, 
then save it, compile it, run it.

Modify it!

Bring your code to class at the start of Week 8, with at least 2 output runs with different data.

What the program should do is take orders(input) for three (3) octoberfest guests, using a "for" loop. (+1 pt.)
Each guest will choose 1 or 2 items (take in as strings) from the menu.
Print (output) an itemized receipt as items are ordered, then a total bill and a "split the bill 3 ways" total.

Bonus(+1 pt.) Modify the "take order part" - so a guest can order as many items as they choose, using a "while" loop.

Bonus(+1 pt.) Use decimal formatter object to display output correctly as dollars and cents, i.e. $3.10 not $3.1 )
*/

//import API's needed here:
import java.util.Scanner;
public class COdetoberFest01 
{  

        public static void main(String args[ ]) 
        {
           Scanner kbd = new Scanner(System.in);
           float total =0; //total bill
           float splitTotal; //for 3 way split of bill
           float cost; //item cost
           int guest =0; //count off guests 
           String item;
           int qty; //number of items a guest will order
           
           System.out.println("Will you be ordering 1 or 2 items?" );
           qty =kbd.nextInt();
           kbd.nextLine();
           guest++;
           if(qty ==2)
           {
           System.out.println("CODETOBER FEST MENU:\n $1.50: jGrasp Pretzel,\n $2.75 sub-routine Saurkraut,\n $3.90 boolean Bier,\n $5.35 double schnitzel ");
           System.out.print("Place your order: ");
           item=kbd.nextLine();
           if(item.charAt(0) == 'j')//jGrasp Pretzel
            cost = 1.50f;
           else if(item.charAt(0) == 's')//sub-routine Saurkraut
            cost = 2.75f;
           else if(item.charAt(0) == 'b')//boolean Bier
            cost = 3.90f;
           else 
            cost =5.35f; // must be double schnitzel
            System.out.println(cost);
            total = total +cost;
        
           }
           System.out.println("CODETOBER FEST MENU:\n $1.50: jGrasp Pretzel,\n $2.75 sub-routine Saurkraut,\n $3.90 boolean Bier,\n $5.35 double schnitzel ");
           System.out.print("Place your order: ");
           item=kbd.nextLine();
           if(item.charAt(0) == 'j')//jGrasp Pretzel
            cost = 1.50f;
           else if(item.charAt(0) == 's')//sub-routine Saurkraut
            cost = 2.75f;
           else if(item.charAt(0) == 'b')//boolean Bier
            cost = 3.90f;
           else 
            cost =5.35f; // must be double schnitzel
            System.out.println(cost);
            total = total + cost;

           System.out.println("Will you be ordering 1 or 2 items?" );
           qty =kbd.nextInt();
           kbd.nextLine();
           guest++;
           if(qty ==2)
           {
           System.out.println("CODETOBER FEST MENU:\n $1.50: jGrasp Pretzel,\n $2.75 sub-routine Saurkraut,\n $3.90 boolean Bier,\n $5.35 double schnitzel ");
           System.out.print("Place your order: ");
           item=kbd.nextLine();
           if(item.charAt(0) == 'j')//jGrasp Pretzel
            cost = 1.50f;
           else if(item.charAt(0) == 's')//sub-routine Saurkraut
            cost = 2.75f;
           else if(item.charAt(0) == 'b')//boolean Bier
            cost = 3.90f;
           else 
            cost =5.35f; // must be double schnitzel  
            System.out.println(cost);
            total = total +cost;
        
           }
           System.out.println("CODETOBER FEST MENU:\n $1.50: jGrasp Pretzel,\n $2.75 sub-routine Saurkraut,\n $3.90 boolean Bier,\n $5.35 double schnitzel ");
           System.out.print("Place your order: ");
           item=kbd.nextLine();
           if(item.charAt(0) == 'j')//jGrasp Pretzel
            cost = 1.50f;
           else if(item.charAt(0) == 's')//sub-routine Saurkraut
            cost = 2.75f;
           else if(item.charAt(0) == 'b')//boolean Bier
            cost = 3.90f;
           else 
            cost =5.35f; // must be double schnitzel
            System.out.println(cost);
            total = total +cost;

           System.out.println("Will you be ordering 1 or 2 items?" );
           qty =kbd.nextInt();
           kbd.nextLine();
           guest++;
           if(qty ==2)
           {
           System.out.println("CODETOBER FEST MENU:\n $1.50: jGrasp Pretzel,\n $2.75 sub-routine Saurkraut,\n $3.90 boolean Bier,\n $5.35 double schnitzel ");
           System.out.print("Place your order: ");
           item=kbd.nextLine();
           if(item.charAt(0) == 'j')//jGrasp Pretzel
            cost = 1.50f;
           else if(item.charAt(0) == 's')//sub-routine Saurkraut
            cost = 2.75f;
           else if(item.charAt(0) == 'b')//boolean Bier
            cost = 3.90f;
           else 
            cost =5.35f; // must be double schnitzel
             System.out.println(cost);
             total = total +cost;
        
           }
           System.out.println("CODETOBER FEST MENU:\n $1.50: jGrasp Pretzel,\n $2.75 sub-routine Saurkraut,\n $3.90 boolean Bier,\n $5.35 double schnitzel ");
           System.out.print("Place your order: ");
           item=kbd.nextLine();
           if(item.charAt(0) == 'j')//jGrasp Pretzel
            cost = 1.50f;
           else if(item.charAt(0) == 's')//sub-routine Saurkraut
            cost = 2.75f;
           else if(item.charAt(0) == 'b')//boolean Bier
            cost = 3.90f;
           else 
            cost =5.35f; // must be double schnitzel
            System.out.println(cost);
            total = total +cost;

           System.out.println("For " + guest + ", The total is: $" + total);
           System.out.println("If you split the bill " + guest + " ways, each guest must pay: $" + (total/guest));
                
                                  
                                  
         } //closing main method
} //closing class header

Answer 1

Below is the modified code : I have used DecimalFormat class to format the decimals. Also StringBuffer class to display the itemized bill. Also modified code to take as many items as customer want instead of 1 or 2 items.

Added for loop to iterate over the three customers.

Added while loop to iterate over the number of orders.

----------------------------------------------------

/*
*Program to take the order and provide the bill to customer.
*/
//import API's needed here:
import java.text.DecimalFormat;
import java.util.Scanner;

public class COdetoberFest01 {

   public static void main(String args[]) {
       Scanner kbd = new Scanner(System.in);
       float total = 0; // total bill
       float splitTotal; // for 3 way split of bill
       float cost; // item cost
       int guest = 0; // count off guests
       String item;
       int qty; // number of items a guest will order
      
       //decimal format object
       DecimalFormat df = new DecimalFormat("#.00");
       //StrigBuffer to hold the items to display in itemized bill
        StringBuffer itemized_bill = new StringBuffer();
      
        for(int i =1; i<=3; i++)
        {
            System.out.println("please enter the number of items you want to order");
              qty = kbd.nextInt();
              kbd.nextLine();
              guest++;
              while (qty > 0)
              {
                  System.out.println(
                          "CODETOBER FEST MENU:\n $1.50: jGrasp Pretzel,\n $2.75 sub-routine Saurkraut,\n $3.90 boolean Bier,\n $5.35 double schnitzel ");
                  System.out.print("Place your order: ");
                  item = kbd.nextLine();
                  if (item.charAt(0) == 'j')// jGrasp Pretzel
                  {
                      cost = 1.50f;
                      itemized_bill.append("jGrasp Pretzel \n");
                  }
                  else if (item.charAt(0) == 's')// sub-routine Saurkraut
                  {
                      cost = 2.75f;
                      itemized_bill.append("sub-routine Saurkraut \n");
                  }
                  else if (item.charAt(0) == 'b')// boolean Bier
                  {
                      cost = 3.90f;
                      itemized_bill.append("boolean Bier \n");
                  }
                  else
                  {
                      cost = 5.35f; // must be double schnitzel
                      itemized_bill.append("double schnitzel \n");
                  }
                  System.out.println(df.format(cost));
                  total = total + cost;
                  qty--;
              }
        }
       System.out.println("For " + guest + ", The total is: $" + df.format(total));
       System.out.println("Itemized bill : \n" + itemized_bill);
       System.out.println("If you split the bill " + guest + " ways, each guest must pay: $" + df.format(total / guest));

   } // closing main method
} // closing class header

------------------------------------------------------

Below is the output:

Ran the code from eclipse. Right clickon the program > Run As > Java Application:

Output of First run:

please enter the number of items you want to order
1
CODETOBER FEST MENU:
$1.50: jGrasp Pretzel,
$2.75 sub-routine Saurkraut,
$3.90 boolean Bier,
$5.35 double schnitzel
Place your order: jGrasp Pretzel
1.50
please enter the number of items you want to order
2
CODETOBER FEST MENU:
$1.50: jGrasp Pretzel,
$2.75 sub-routine Saurkraut,
$3.90 boolean Bier,
$5.35 double schnitzel
Place your order: sub-routine Saurkraut
2.75
CODETOBER FEST MENU:
$1.50: jGrasp Pretzel,
$2.75 sub-routine Saurkraut,
$3.90 boolean Bier,
$5.35 double schnitzel
Place your order: double schnitzel
5.35
please enter the number of items you want to order
1
CODETOBER FEST MENU:
$1.50: jGrasp Pretzel,
$2.75 sub-routine Saurkraut,
$3.90 boolean Bier,
$5.35 double schnitzel
Place your order: boolean Bier
3.90
For 3, The total is: $13.50
Itemized bill :
jGrasp Pretzel
sub-routine Saurkraut
double schnitzel
boolean Bier

If you split the bill 3 ways, each guest must pay: $4.50

-----------------------------------------------------------------------------------

2nd Run output:

please enter the number of items you want to order
1
CODETOBER FEST MENU:
$1.50: jGrasp Pretzel,
$2.75 sub-routine Saurkraut,
$3.90 boolean Bier,
$5.35 double schnitzel
Place your order: j
1.50
please enter the number of items you want to order
2
CODETOBER FEST MENU:
$1.50: jGrasp Pretzel,
$2.75 sub-routine Saurkraut,
$3.90 boolean Bier,
$5.35 double schnitzel
Place your order: b
3.90
CODETOBER FEST MENU:
$1.50: jGrasp Pretzel,
$2.75 sub-routine Saurkraut,
$3.90 boolean Bier,
$5.35 double schnitzel
Place your order: d
5.35
please enter the number of items you want to order
1
CODETOBER FEST MENU:
$1.50: jGrasp Pretzel,
$2.75 sub-routine Saurkraut,
$3.90 boolean Bier,
$5.35 double schnitzel
Place your order: b
3.90
For 3, The total is: $14.65
Itemized bill :
jGrasp Pretzel
boolean Bier
double schnitzel
boolean Bier

If you split the bill 3 ways, each guest must pay: $4.88

-----------------------------------------------------------------------------------