根据以上要求帮我写一段完整的代码

以下是一个简单的面向过程的C++图书馆管理系统的代码示例：

#include <iostream>
#include <vector>
#include <string>

struct Book {
    std::string title;
    std::string author;
    std::string publicationDate;
    bool isAvailable;
};

std::vector<Book> library;

void addBook() {
    Book book;
    std::cout << "Enter book title: ";
    std::cin >> book.title;
    std::cout << "Enter book author: ";
    std::cin >> book.author;
    std::cout << "Enter publication date: ";
    std::cin >> book.publicationDate;
    book.isAvailable = true;
    
    library.push_back(book);
    std::cout << "Book added successfully!" << std::endl;
}

void deleteBook() {
    std::string title;
    std::cout << "Enter book title to delete: ";
    std::cin >> title;
    
    for (auto it = library.begin(); it != library.end(); ++it) {
        if ((*it).title == title) {
            library.erase(it);
            std::cout << "Book deleted successfully!" << std::endl;
            return;
        }
    }
    
    std::cout << "Book not found!" << std::endl;
}

void displayBooks() {
    if (library.empty()) {
        std::cout << "No books in the library." << std::endl;
        return;
    }
    
    for (const auto& book : library) {
        std::cout << "Title: " << book.title << std::endl;
        std::cout << "Author: " << book.author << std::endl;
        std::cout << "Publication Date: " << book.publicationDate << std::endl;
        std::cout << "Availability: " << (book.isAvailable ? "Available" : "Not Available") << std::endl;
        std::cout << "----------------------" << std::endl;
    }
}

void menu() {
    std::cout << "Library Management System" << std::endl;
    std::cout << "1. Add Book" << std::endl;
    std::cout << "2. Delete Book" << std::endl;
    std::cout << "3. Display Books" << std::endl;
    std::cout << "4. Quit" << std::endl;
    std::cout << "Enter your choice: ";
}

int main() {
    int choice;
    
    while (true) {
        menu();
        std::cin >> choice;
        
        switch (choice) {
            case 1:
                addBook();
                break;
            case 2:
                deleteBook();
                break;
            case 3:
                displayBooks();
                break;
            case 4:
                std::cout << "Quitting the program..." << std::endl;
                return 0;
            default:
                std::cout << "Invalid choice. Please try again." << std::endl;
                break;
        }
        
        std::cout << std::endl;
    }
    
    return 0;
}

这段代码实现了添加图书、删除图书、显示图书等基本功能。你可以根据需要进行修改和扩展，例如增加借阅和归还图书的功能。请确保在运行代码之前已经创建好了C++项目，并将以上代码复制到项目文件中进行编译和运行。