Base de datos de libros Ejercicio C# - Curso de Programación C# (C Sharp)

using System;  // Import the System namespace for basic functionality

// Define the Book struct to store data about a book
struct Book
{
    public string title;  // Title of the book
    public string author;  // Author of the book
}

class Program  // Define the main class
{
    static void Main()  // The entry point of the program
    {
        // Define an array of Book structs to store up to 1000 books
        Book[] books = new Book[1000];
        int bookCount = 0;  // Initialize the counter for the number of books entered

        bool exit = false;  // Variable to control the exit condition of the loop

        // Menu loop to repeatedly show the options until the user chooses to exit
        while (!exit)
        {
            // Display the menu with options
            Console.WriteLine("\nMenu:");
            Console.WriteLine("1. Add data for one book");
            Console.WriteLine("2. Display all entered books");
            Console.WriteLine("3. Search for a book by title");
            Console.WriteLine("4. Delete a book by position");
            Console.WriteLine("5. Exit");
            Console.Write("Choose an option (1-5): ");

            // Read the user's menu choice
            string choice = Console.ReadLine();

            // Perform actions based on the user's choice
            switch (choice)
            {
                case "1":
                    // Add data for one book
                    if (bookCount < books.Length)
                    {
                        Console.WriteLine("\nEnter data for Book " + (bookCount + 1) + ":");

                        Console.Write("Enter book title: ");
                        books[bookCount].title = Console.ReadLine();  // Get the book title

                        Console.Write("Enter book author: ");
                        books[bookCount].author = Console.ReadLine();  // Get the book author

                        bookCount++;  // Increment the counter for the number of books entered
                    }
                    else
                    {
                        Console.WriteLine("Maximum number of books reached.");
                    }
                    break;

                case "2":
                    // Display all entered books
                    if (bookCount > 0)
                    {
                        Console.WriteLine("\nEntered Books:");
                        for (int i = 0; i < bookCount; i++)
                        {
                            Console.WriteLine($"{i + 1}. Title: {books[i].title}, Author: {books[i].author}");
                        }
                    }
                    else
                    {
                        Console.WriteLine("No books entered yet.");
                    }
                    break;

                case "3":
                    // Search for a book by title
                    Console.Write("\nEnter the title of the book to search: ");
                    string searchTitle = Console.ReadLine();  // Get the title to search for

                    bool found = false;  // Flag to track if the book is found
                    Console.WriteLine("\nSearch Results:");
                    for (int i = 0; i < bookCount; i++)
                    {
                        if (books[i].title.Equals(searchTitle, StringComparison.OrdinalIgnoreCase))  // Check if titles match
                        {
                            Console.WriteLine($"{i + 1}. Title: {books[i].title}, Author: {books[i].author}");
                            found = true;  // Set found flag to true
                        }
                    }

                    if (!found)
                    {
                        Console.WriteLine("No book found with that title.");
                    }
                    break;

                case "4":
                    // Delete a book by position
                    Console.Write("\nEnter the book number to delete: ");
                    int deleteIndex;
                    if (int.TryParse(Console.ReadLine(), out deleteIndex) && deleteIndex > 0 && deleteIndex <= bookCount)
                    {
                        // Shift all books after the deleted one to fill the gap
                        for (int i = deleteIndex - 1; i < bookCount - 1; i++)
                        {
                            books[i] = books[i + 1];  // Move the next book to the current position
                        }

                        bookCount--;  // Decrease the count of books
                        Console.WriteLine($"Book number {deleteIndex} has been deleted.");
                    }
                    else
                    {
                        Console.WriteLine("Invalid book number.");
                    }
                    break;

                case "5":
                    // Exit the program
                    exit = true;
                    Console.WriteLine("Exiting the program.");
                    break;

                default:
                    // Handle invalid menu choices
                    Console.WriteLine("Invalid choice, please select a valid option.");
                    break;
            }
        }
    }
}