C# Online Compiler | .NET Fiddle

<no name> by Anonymous

using System;

class Book
{
    public string Title { get; set; }
    public string Author { get; set; }
    public int DatePublished { get; set; }
    public double Price { get; set; }

    public Book()
    {

    }

    public Book(string title, string author, int datePublished, double price)
    {
        Title = title;
        Author = author;
        DatePublished = datePublished;
        Price = price;
    }

    public Book(string title, string author, int datePublished)
    {
        Title = title;
        Author = author;
        DatePublished = datePublished;
    }
}

class Program
{
    static double total = 0;
    static bool checkout = true;

    static void Main()
    {
        do
        {
            Console.WriteLine("Welcome to the bookstore!");
            Console.WriteLine("Select an item to buy: \n [1] Books ($5-$15) \n [2] Pencils ($1) \n [3] View Books \n [4] Bookmarks ($2) \n [5] Checkout");
            int choice = 0;

            while (choice != 5)
            {
                choice = Convert.ToInt32(Console.ReadLine());

                switch (choice)
                {
                    case 1:
                        BuyBooks();
                        break;
                    case 2:
                        BuyPencils();
                        break;
                    case 3:
                        ViewBooks();
                        break;
                    case 4:
                        BuyBookmarks();
                        break;
                    case 5:
                        Checkout();
						checkout = false;
                        break;
                    default:
                        Console.WriteLine("Invalid choice");
                        break;
                }
            }
        } while (checkout == true);
    }

    static void BuyBooks()
    {
        Book[] books = new Book[5];
        books[0] = new Book("The Great Gatsby", "F. Scott Fitzgerald", 1925, 5.00);
        books[1] = new Book("The Hunger Games, Catching Fire", "Suzan Collins", 2009, 6.00);
        books[2] = new Book("Fifty Shades Of Grey", "E.L James", 2011, 10.00);
        books[3] = new Book("1984", "George Orwell", 1949, 12.00);
        books[4] = new Book("The Girl on the Train", "Paula Hawkins", 2015, 15.00);

        Console.WriteLine("Here are the available books:");
        for (int i = 0; i < books.Length; i++)
        {
            Console.WriteLine($"{i + 1}. {books[i].Title} by {books[i].Author} - ${books[i].Price:F2}");
        }

        Console.WriteLine("Enter the book number to add to cart:");
        int bookNumber = Convert.ToInt32(Console.ReadLine());

        if (bookNumber >= 1 && bookNumber <= 5)
        {
            Console.WriteLine("Enter the quantity:");
            int quantity = Convert.ToInt32(Console.ReadLine());
            total += books[bookNumber - 1].Price * quantity;
            Console.WriteLine("Book(s) added to cart! \n");
			Console.WriteLine("Welcome to the bookstore!");
            Console.WriteLine("Select an item to buy: \n [1] Books \n [2] Pencils \n [3] View Books \n [4] Bookmarks \n [5] Checkout");
        }
        else
        {
            Console.WriteLine("Invalid book number");
        }
    }

    static void BuyPencils()
    {
        Console.WriteLine("How many pencils would you like to buy?");
        int quantity = Convert.ToInt32(Console.ReadLine());
        total += quantity * 1.00;
        Console.WriteLine($"Pencil(s) added to the cart! \n ");
		Console.WriteLine("Welcome to the bookstore!");
        Console.WriteLine("Select an item to buy: \n [1] Books \n [2] Pencils \n [3] View Books \n [4] Bookmarks \n [5] Checkout");
    }

    static void ViewBooks()
    {
        Book[] books = new Book[5];
        books[0] = new Book("The Great Gatsby", "F. Scott Fitzgerald", 1925);
        books[1] = new Book("The Hunger Games, Catching Fire", "Suzan Collins", 2009);
        books[2] = new Book("Fifty Shades Of Grey", "E.L James", 2011);
        books[3] = new Book("1984", "George Orwell", 1949);
        books[4] = new Book("The Girl on the Train", "Paula Hawkins", 2015);

        Console.WriteLine("Available books:");
        for (int i = 0; i < books.Length; i++)
        {
            Console.WriteLine($"{i + 1}. {books[i].Title} by {books[i].Author}");
        }
    }

    static void BuyBookmarks()
    {
        Console.WriteLine("How many bookmarks would you like to buy?");
        int quantity = Convert.ToInt32(Console.ReadLine());
        total += quantity * 2.00;
        Console.WriteLine($"Bookmarks added to cart! \n");
		Console.WriteLine("Welcome to the bookstore!");
        Console.WriteLine("Select an item to buy: \n [1] Books \n [2] Pencils \n [3] View Books \n [4] Bookmarks \n [5] Checkout");
    }

    static void Checkout()
{
    Console.WriteLine($"Total due: ${total:F2}");

    Console.WriteLine("Please enter the amount of dollars: ");
    double payment = Convert.ToDouble(Console.ReadLine());

    if (payment < total)
    {
        Console.WriteLine("Insufficient payment. Please provide enough funds.");
    }
    else
    {
        double change = payment - total;
        Console.WriteLine($"Your change is: ${change:F2}");
        total = 0; // Reset total after checkout
        Console.WriteLine("Thank you for shopping with us!");
    }
}
}

​x
 
using System;
​
class Book
{
    public string Title { get; set; }
    public string Author { get; set; }
    public int DatePublished { get; set; }
    public double Price { get; set; }
​
    public Book()
    {
​
    }
​
    public Book(string title, string author, int datePublished, double price)
    {
        Title = title;
        Author = author;
        DatePublished = datePublished;
        Price = price;
    }
​
    public Book(string title, string author, int datePublished)
    {
        Title = title;
        Author = author;
        DatePublished = datePublished;
    }
}
​
class Program
{
    static double total = 0;
    static bool checkout = true;
​
    static void Main()
    {
        do
        {
            Console.WriteLine("Welcome to the bookstore!");
            Console.WriteLine("Select an item to buy: \n [1] Books ($5-$15) \n [2] Pencils ($1) \n [3] View Books \n [4] Bookmarks ($2) \n [5] Checkout");
            int choice = 0;
​
            while (choice != 5)
            {
                choice = Convert.ToInt32(Console.ReadLine());
​
                switch (choice)
                {
                    case 1:
                        BuyBooks();
                        break;
                    case 2:
                        BuyPencils();
                        break;
                    case 3:
                        ViewBooks();
                        break;
                    case 4:
                        BuyBookmarks();
                        break;
                    case 5:
                        Checkout();
                        checkout = false;
                        break;
                    default:
                        Console.WriteLine("Invalid choice");
                        break;
                }
            }
        } while (checkout == true);
    }
​
    static void BuyBooks()
    {
        Book[] books = new Book[5];
        books[0] = new Book("The Great Gatsby", "F. Scott Fitzgerald", 1925, 5.00);
        books[1] = new Book("The Hunger Games, Catching Fire", "Suzan Collins", 2009, 6.00);
        books[2] = new Book("Fifty Shades Of Grey", "E.L James", 2011, 10.00);
        books[3] = new Book("1984", "George Orwell", 1949, 12.00);
        books[4] = new Book("The Girl on the Train", "Paula Hawkins", 2015, 15.00);
​
        Console.WriteLine("Here are the available books:");
        for (int i = 0; i < books.Length; i++)
        {
            Console.WriteLine($"{i + 1}. {books[i].Title} by {books[i].Author} - ${books[i].Price:F2}");
        }
​
        Console.WriteLine("Enter the book number to add to cart:");
        int bookNumber = Convert.ToInt32(Console.ReadLine());
​
        if (bookNumber >= 1 && bookNumber <= 5)
        {
            Console.WriteLine("Enter the quantity:");
            int quantity = Convert.ToInt32(Console.ReadLine());
            total += books[bookNumber - 1].Price * quantity;
            Console.WriteLine("Book(s) added to cart! \n");
            Console.WriteLine("Welcome to the bookstore!");
            Console.WriteLine("Select an item to buy: \n [1] Books \n [2] Pencils \n [3] View Books \n [4] Bookmarks \n [5] Checkout");
        }
        else
        {
            Console.WriteLine("Invalid book number");
        }
    }
​
    static void BuyPencils()
    {
        Console.WriteLine("How many pencils would you like to buy?");
        int quantity = Convert.ToInt32(Console.ReadLine());
        total += quantity * 1.00;
        Console.WriteLine($"Pencil(s) added to the cart! \n ");
        Console.WriteLine("Welcome to the bookstore!");
        Console.WriteLine("Select an item to buy: \n [1] Books \n [2] Pencils \n [3] View Books \n [4] Bookmarks \n [5] Checkout");
    }
​
    static void ViewBooks()
    {
        Book[] books = new Book[5];
        books[0] = new Book("The Great Gatsby", "F. Scott Fitzgerald", 1925);
        books[1] = new Book("The Hunger Games, Catching Fire", "Suzan Collins", 2009);
        books[2] = new Book("Fifty Shades Of Grey", "E.L James", 2011);
        books[3] = new Book("1984", "George Orwell", 1949);
        books[4] = new Book("The Girl on the Train", "Paula Hawkins", 2015);
​
        Console.WriteLine("Available books:");
        for (int i = 0; i < books.Length; i++)
        {
            Console.WriteLine($"{i + 1}. {books[i].Title} by {books[i].Author}");
        }
    }
​
    static void BuyBookmarks()
    {
        Console.WriteLine("How many bookmarks would you like to buy?");
        int quantity = Convert.ToInt32(Console.ReadLine());
        total += quantity * 2.00;
        Console.WriteLine($"Bookmarks added to cart! \n");
        Console.WriteLine("Welcome to the bookstore!");
        Console.WriteLine("Select an item to buy: \n [1] Books \n [2] Pencils \n [3] View Books \n [4] Bookmarks \n [5] Checkout");
    }
​
    static void Checkout()
{
    Console.WriteLine($"Total due: ${total:F2}");
​
    Console.WriteLine("Please enter the amount of dollars: ");
    double payment = Convert.ToDouble(Console.ReadLine());
​
    if (payment < total)
    {
        Console.WriteLine("Insufficient payment. Please provide enough funds.");
    }
    else
    {
        double change = payment - total;
        Console.WriteLine($"Your change is: ${change:F2}");
        total = 0; // Reset total after checkout
        Console.WriteLine("Thank you for shopping with us!");
    }
}
}

Contact1 (JsonPropertyName): OK, type = Phone
Contact1 (JsonPropertyName): FAIL, message = The JSON value could not be converted to System.Nullable`1[Program+ContactType1]. Path: $.type | LineNumber: 0 | BytePositionInLine: 17.
Contact2 (EnumMember): OK, type = Phone
Contact2 (EnumMember): FAIL, message = The JSON value could not be converted to System.Nullable`1[Program+ContactType2]. Path: $.type | LineNumber: 0 | BytePositionInLine: 17.
Contact3 (JsonStringEnumConverter): OK, type = Phone
Contact3 (JsonStringEnumConverter): OK, type = Phone

Last Run:	11:05:50 am
Compile:	0.037s
Execute:	0.14s
Memory:	3.84Mb
CPU:	0.177s

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