Library-Management-system

My first repository in Github
Author - Om shukla

#include #include #include #include <unordered_map> using namespace std;

struct Book { string title, author, ISBN; bool isAvailable = true; };

// Vector to store books vector library;

// Unordered map for quick book lookup unordered_map<string, bool> bookStatus;

// Function to add a book void addBook() { Book book; cout << "Enter book title: "; cin.ignore(); getline(cin, book.title); cout << "Enter author name: "; getline(cin, book.author) cout << "Enter ISBN: "; cin >> book.ISBN;

library.push_back(book);
bookStatus[book.title] = true;
cout << "Book added successfully!\n";

}

// Function to display books void displayBooks() { if (library.empty()) { cout << "No books available.\n"; return; } cout << "\nLibrary Books:\n"; for (const auto &book : library) { cout << book.title << " by " << book.author << " (ISBN: " << book.ISBN << ") - " << (book.isAvailable ? "Available" : "Borrowed") << endl; } }

// Function to sort books by title void sortByTitle() { sort(library.begin(), library.end(), [](const Book &a, const Book &b) { return a.title < b.title; }); cout << "Books sorted by title.\n"; }

// Function to sort books by author void sortByAuthor() { sort(library.begin(), library.end(), [](const Book &a, const Book &b) { return a.author < b.author; }); cout << "Books sorted by author.\n"; }

// Function to search for a book by title void searchBook() { cout << "Enter book title to search: "; cin.ignore(); string key; getline(cin, key);

auto it = find_if(library.begin(), library.end(), [&](const Book &b) {
    return b.title == key;
});

if (it != library.end()) {
    cout << "Book found: " << it->title << " by " << it->author 
         << " (ISBN: " << it->ISBN << ") - " 
         << (it->isAvailable ? "Available" : "Borrowed") << endl;
} else {
    cout << "Book not found.\n";
}

}

// Function to borrow a book void borrowBook() { cout << "Enter book title to borrow: "; cin.ignore(); string key; getline(cin, key);

if (bookStatus.count(key) && bookStatus[key]) {
    bookStatus[key] = false;
    cout << "You borrowed the book: " << key << endl;
} else {
    cout << "Book not found or already borrowed.\n";
}

}

// Function to return a book void returnBook() { cout << "Enter book title to return: "; cin.ignore(); string key; getline(cin, key);

if (bookStatus.count(key) && !bookStatus[key]) {
    bookStatus[key] = true;
    cout << "You returned the book: " << key << endl;
} else {
    cout << "Book not found or not borrowed.\n";
}

}

// Main Menu int main() { int choice; do { cout << "\nLibrary Management System\n"; cout << "1. Add Book\n2. Display Books\n3. Sort by Title\n"; cout << "4. Sort by Author\n5. Search Book\n6. Borrow Book\n"; cout << "7. Return Book\n8. Exit\nEnter choice: "; cin >> choice;

    switch (choice) {
        case 1: addBook(); break;
        case 2: displayBooks(); break;
        case 3: sortByTitle(); break;
        case 4: sortByAuthor(); break;
        case 5: searchBook(); break;
        case 6: borrowBook(); break;
        case 7: returnBook(); break;
        case 8: cout << "Exiting...\n"; break;
        default: cout << "Invalid choice!\n";
    }
} while (choice != 8);

return 0;

}