CODEWITHSUNDEEP
c#class
Solstice
Solstice

Reputation: 3

Making an ID system for objects in C#

Im trying to make a program about books, and it needs and ID system. I want to get the access to the information about a specifict object with the book ID. For example:

Console.Write("What ID is the book ")
//tempId = **ID**
int tempId = Convert.ToInt32(Console.ReadLine());
Console.WriteLine(book**ID**.title); //.title = the title of the book

How can I do something like that?

I thought about doing that with a static class atribute, but I'm pretty sure this isn't possible.

Upvotes: 0

Views: 191

Answers (1)

Jose Antonio Gomez De La Hiz
Jose Antonio Gomez De La Hiz

Reputation: 58

What I would do would be to create a class "book" containing the attributes you need (id, name, publication date...) and store all these books in an array of type map with the id as primary key. I do not know if I solve your question with this, if your question was not this one, ask me again the question and I will try to help you.

This would be an example of the class "book":

#include <string>

class Book {
 public:
  Book(int id, std::string name, std::string publicationDate)
      : id_(id), name_(name), publicationDate_(publicationDate) {}

  int id() const { return id_; }
  std::string name() const { return name_; }
  std::string publicationDate() const { return publicationDate_; }

 private:
  int id_;
  std::string name_;
  std::string publicationDate_;
};

And so you can create the map I was telling you about:

int main() {
  std::map<int, Book> library;
  library[123] = Book(123, "El Quijote", "1605-01-01");
  library[456] = Book(456, "Cien años de soledad", "1967-05-01");
  library[789] = Book(789, "Don Juan Tenorio", "1844-01-01");

  int bookId = 456;
  auto it = library.find(bookId);
  
  return 0;
}

The above code creates a map with three books and retrieves in it the one with id 456.

Upvotes: 2

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