Question

C++

You will have to write a simple food kiosk menu, and allow the user to enter different options to make a purchase. Every option generates a different response from the kiosk. The program starts by printing the following menu:

Please select a menu item from the list below: 
1 – View food menu
2 – Pay total due
3 – Add $5 in credit
4 – Clear order

The user can input a numerical menu option between 1 and 4. If an incorrect entry is inputted then the program will print.

Please enter a valid option!

Below is an explanation of each menu option:

• 1 – View food menu: This option will go into another menu which will display food options to the user. The user can input a numerical menu option between 1 and 5.

What would you like to add to your order?
(1) Chicken Sandwich: $3.45
(2) Chicken Salad: $4.00
(3) French Fries: $1.99
(4) Hotdog: $2.99
(5) Pizza: $3.99
(6) Go to main menu
Your current total is: $0.00

If an incorrect entry is inputted then the program will print.

Invalid item number please try again

This menu will loop until the user enters option 6 which will bring them back to the main menu. When the user inputs an option between 1 and 5 the program will display a confirmation of the selected item. Make sure that each corresponding menu option prints the exact confirmation format listed below:

You have added a Chicken Sandwich to your order.
You have added a Chicken Salad to your order.
You have added French Fries to your order.
You have added a Hot Dog to your order.
You have added a Slice of Pizza to your order.

Below is an example of the console output when the user chooses option 1 and then 2 (note that the input is not visible in the output).

What would you like to add to your order?
(1) Chicken Sandwich: $3.45
(2) Chicken Salad: $4.00
(3) French Fries: $1.99
(4) Hotdog: $2.99
(5) Pizza: $3.99
(6) Go to main menu
Your current total is: $0.00

You have added a Chicken Sandwich to your order.
What would you like to add to your order?
(1) Chicken Sandwich: $3.45
(2) Chicken Salad: $4.00
(3) French Fries: $1.99
(4) Hotdog: $2.99
(5) Pizza: $3.99
(6) Go to main menu
Your current total is: $3.45

You have added a Chicken Salad to your order.
What would you like to add to your order?
(1) Chicken Sandwich: $3.45
(2) Chicken Salad: $4.00
(3) French Fries: $1.99
(4) Hotdog: $2.99
(5) Pizza: $3.99
(6) Go to main menu
Your current total is: $7.45

• 2 – Pay total due: This option allows the user to pay the amount that is due. The user will start from an initial budget of $10 and if the user is able to afford the total due then the purchase will go through and the user will see the following text:

Your total due is: $7.45
Thank you! Your change is: $2.55
Enjoy your meal!

If the user cannot afford the purchase they will received the following console text and exit the program:

Insufficient funds!

• 3 - Add $5 in credit: This option increments the available credit by $5, and prints the new available credit (with 2 digits precision):

Credit available: $<credit>

• 4 – Clear order: This menu option will reset the total balance due to $0:

Current order balance has been cleared. Current due: $0.00 

Below is an example of what the program should output based on the input 1 3 5 6 2.

Please select a menu item from the list below
1 - View Food Menu
2 - Pay total due
3 - Add $5 in credit
4 - Clear order

What would you like to add to your order?
(1) Chicken Sandwich: $3.45
(2) Chicken Salad: $4.00
(3) French Fries: $1.99
(4) Hotdog: $2.99
(5) Pizza: $3.99
(6) Go to main menu
Your current total is: $0.00
You have added French Fries to your order.

What would you like to add to your order?
(1) Chicken Sandwich: $3.45
(2) Chicken Salad: $4.00
(3) French Fries: $1.99
(4) Hotdog: $2.99
(5) Pizza: $3.99
(6) Go to main menu
Your current total is: $1.99
You have selected added a Slice of Pizza to your order

What would you like to add to your order?
(1) Chicken Sandwich: $3.45
(2) Chicken Salad: $4.00
(3) French Fries: $1.99
(4) Hotdog: $2.99
(5) Pizza: $3.99
(6) Go to main menu
Your current total is: $5.98

Please select a menu item from the list below
1 - View Food Menu
2 - Pay total due
3 - Add $5 in credit
4 - Clear order

Your total due is: $5.98
Thank you! Your change is: $4.02
Enjoy your meal!

Every dollar amount must be printed with 2 digits precision. Check section 9.2 of this book for how to use setprecision and iomanip to achieve this result.

Answer 1

/* C++ program that demonstrates the restaurants menu and paying bill. */
//main.c
//include header file
#include<iostream>
#include<iomanip>
using namespace std;
//function prototypes
int menu();
int viewFoodMenu(double &totalpay);
void paybill(double balance, double due);
void addCredit(double &balance);
void clearOrder(double &balance);
//start of main function
int main()
{
   double balance=10;
   double payamount=0;
   int choice;
   //set repeat to true
   bool repeat=true;
   //run loop until repeat is true
   while(repeat)
   {
       choice=menu();
       switch(choice)
       {
       case 1:
           viewFoodMenu(payamount);
           break;
       case 2:
           paybill(balance,payamount);
           //set repeat to false
           repeat=false;
           break;
       case 3:
           addCredit(balance);
           break;
       case 4:
           clearOrder(payamount);
           break;
       }
   }

   //pause program output on console window
   system("pause");
   return 0;
}
//Function to clear order
void clearOrder(double &payamount)
{
   payamount=0;
}
//Function to add credit,5 to balance
void addCredit(double &balance)
{
   const int CREDIT=5;
   balance=balance+CREDIT;
}
//Functioin to choose menu choice
int menu()
{
   int order;
   cout<<"Please select a menu item from the list below"<<endl;
   cout<<"1 - View Food Menu"<<endl;
   cout<<"2 - Pay total due"<<endl;
   cout<<"3 - Add $5 in credit"<<endl;
   cout<<"4 - Clear order"<<endl;
   cin>>order;
   return order;
}
//Function to pay bill amount
void paybill(double balance, double due)
{

   if(balance>due)
   {
       cout<<"Your total due is: $"<<fixed<<setprecision(2)<<due<<endl;
       cout<<"Thank you! Your change is: $"
           <<fixed<<setprecision(2)<<(balance-due)<<endl;
       cout<<"Enjoy your meal!"<<endl;
   }

}
//Function to display the menu
int viewFoodMenu(double &totalpay)
{
   int choice;
   cout<<"What would you like to add to your order?"<<endl;
   cout<<"(1) Chicken Sandwich: $3.45"<<endl;
   cout<<"(2) Chicken Salad: $4.00"<<endl;
   cout<<"(3) French Fries: $1.99"<<endl;
   cout<<"(4) Hotdog: $2.99"<<endl;
   cout<<"(5) Pizza: $3.99"<<endl;
   cout<<"(6) Go to main menu"<<endl;
   cin>>choice;

   if(choice==6)
       return 0;

   switch(choice)
   {
       case 1:
           totalpay=totalpay+3.45;
           cout<<"You have added Chicken Sandwich to your order."<<endl;
           break;
       case 2:
           totalpay=totalpay+4.00;
           cout<<"You have added Chicken Salad to your order."<<endl;
           break;
       case 3:
           totalpay=totalpay+1.99;
           cout<<"You have added French Fries to your order."<<endl;
           break;
       case 4:
           totalpay=totalpay+2.99;
           cout<<"You have added Hotdog to your order."<<endl;
           break;
       case 5:
           totalpay=totalpay+3.99;
           cout<<"You have added Pizza to your order."<<endl;
           break;
   }

   cout<<"Your current total is: $"<<fixed<<setprecision(2)
       <<totalpay<<endl;
}

Sample Output: