// Importing the System namespace to handle basic functionalities and console output
using System;
using System.Collections.Generic;
// Defining the base class 'CatalogItem' to represent an item in the catalog
public class CatalogItem
{
public string Name { get; set; } // Name of the catalog item
public string Code { get; set; } // Code to identify the catalog item
public string Category { get; set; } // Category of the catalog item (e.g., music, film, program)
public double Size { get; set; } // Size of the catalog item (e.g., size of a file)
// Constructor to initialize the catalog item with necessary details
public CatalogItem(string name, string code, string category, double size)
{
Name = name; // Set the name of the catalog item
Code = code; // Set the code for the catalog item
Category = category; // Set the category of the catalog item
Size = size; // Set the size of the catalog item
}
// Method to display information about the catalog item
public virtual void Display()
{
Console.WriteLine($"Name: {Name}, Code: {Code}, Category: {Category}, Size: {Size}MB");
}
}
// Defining the MusicFile class that extends CatalogItem, with additional properties for music
public class MusicFile : CatalogItem
{
public string Singer { get; set; } // Singer of the music file
public double Length { get; set; } // Length of the music file in seconds
// Constructor to initialize a music file with additional properties
public MusicFile(string name, string code, string category, double size, string singer, double length)
: base(name, code, category, size)
{
Singer = singer; // Set the singer of the music file
Length = length; // Set the length of the music file in seconds
}
// Overriding the Display method to show music-specific information
public override void Display()
{
base.Display(); // Call the base class method to display common information
Console.WriteLine($"Singer: {Singer}, Length: {Length} seconds");
}
}
// Defining the Film class that extends CatalogItem, with additional properties for films
public class Film : CatalogItem
{
public string Director { get; set; } // Director of the film
public string MainActor { get; set; } // Main actor in the film
public string MainActress { get; set; } // Main actress in the film
// Constructor to initialize a film with additional properties
public Film(string name, string code, string category, double size, string director, string mainActor, string mainActress)
: base(name, code, category, size)
{
Director = director; // Set the director of the film
MainActor = mainActor; // Set the main actor of the film
MainActress = mainActress; // Set the main actress of the film
}
// Overriding the Display method to show film-specific information
public override void Display()
{
base.Display(); // Call the base class method to display common information
Console.WriteLine($"Director: {Director}, Main Actor: {MainActor}, Main Actress: {MainActress}");
}
}
// Defining the ComputerProgram class that extends CatalogItem, with additional properties for computer programs
public class ComputerProgram : CatalogItem
{
// Constructor to initialize a computer program with properties
public ComputerProgram(string name, string code, string category, double size)
: base(name, code, category, size)
{
}
// Overriding the Display method to show program-specific information
public override void Display()
{
base.Display(); // Call the base class method to display common information
}
}
// Main program to implement the catalog system and the menu
public class Program
{
// List to store different catalog items (music, films, programs)
private static List catalogItems = new List();
public static void Main()
{
bool keepRunning = true; // Flag to keep the program running until the user decides to exit
while (keepRunning)
{
// Displaying the menu options to the user
Console.WriteLine("Catalog Menu:");
Console.WriteLine("1. Add a new music file");
Console.WriteLine("2. Add a new film");
Console.WriteLine("3. Add a new computer program");
Console.WriteLine("4. Display all catalog items");
Console.WriteLine("5. Exit");
Console.Write("Select an option (1-5): ");
// Reading the user's selection
int option = Convert.ToInt32(Console.ReadLine());
// Handling the menu options
switch (option)
{
case 1:
AddMusicFile(); // Call the method to add a music file
break;
case 2:
AddFilm(); // Call the method to add a film
break;
case 3:
AddComputerProgram(); // Call the method to add a computer program
break;
case 4:
DisplayCatalog(); // Call the method to display all catalog items
break;
case 5:
keepRunning = false; // Set the flag to false to exit the program
break;
default:
Console.WriteLine("Invalid option. Please try again.");
break;
}
}
}
// Method to add a new music file to the catalog
private static void AddMusicFile()
{
// Prompting the user for music file details
Console.Write("Enter the name of the music file: ");
string name = Console.ReadLine();
Console.Write("Enter the code of the music file: ");
string code = Console.ReadLine();
Console.Write("Enter the category of the music file: ");
string category = Console.ReadLine();
Console.Write("Enter the size of the music file (MB): ");
double size = Convert.ToDouble(Console.ReadLine());
Console.Write("Enter the singer: ");
string singer = Console.ReadLine();
Console.Write("Enter the length of the music file (seconds): ");
double length = Convert.ToDouble(Console.ReadLine());
// Creating a new MusicFile object and adding it to the catalog
MusicFile musicFile = new MusicFile(name, code, category, size, singer, length);
catalogItems.Add(musicFile);
}
// Method to add a new film to the catalog
private static void AddFilm()
{
// Prompting the user for film details
Console.Write("Enter the name of the film: ");
string name = Console.ReadLine();
Console.Write("Enter the code of the film: ");
string code = Console.ReadLine();
Console.Write("Enter the category of the film: ");
string category = Console.ReadLine();
Console.Write("Enter the size of the film (MB): ");
double size = Convert.ToDouble(Console.ReadLine());
Console.Write("Enter the director of the film: ");
string director = Console.ReadLine();
Console.Write("Enter the main actor of the film: ");
string mainActor = Console.ReadLine();
Console.Write("Enter the main actress of the film: ");
string mainActress = Console.ReadLine();
// Creating a new Film object and adding it to the catalog
Film film = new Film(name, code, category, size, director, mainActor, mainActress);
catalogItems.Add(film);
}
// Method to add a new computer program to the catalog
private static void AddComputerProgram()
{
// Prompting the user for computer program details
Console.Write("Enter the name of the computer program: ");
string name = Console.ReadLine();
Console.Write("Enter the code of the computer program: ");
string code = Console.ReadLine();
Console.Write("Enter the category of the program: ");
string category = Console.ReadLine();
Console.Write("Enter the size of the program (MB): ");
double size = Convert.ToDouble(Console.ReadLine());
// Creating a new ComputerProgram object and adding it to the catalog
ComputerProgram program = new ComputerProgram(name, code, category, size);
catalogItems.Add(program);
}
// Method to display all catalog items (music files, films, programs)
private static void DisplayCatalog()
{
// Checking if the catalog has any items
if (catalogItems.Count == 0)
{
Console.WriteLine("No items in the catalog.");
}
else
{
// Displaying each catalog item
Console.WriteLine("\nCatalog Items:");
foreach (var item in catalogItems)
{
item.Display(); // Calling the Display method of each catalog item
Console.WriteLine(); // Adding a blank line for readability
}
}
// Waiting for the user to press a key before returning to the menu
Console.WriteLine("Press any key to return to the menu.");
Console.ReadKey();
}
}