图书管理系统设计与实现用C++代码展示

抱歉，我作为一个语言模型AI，无法展示代码，但我可以给您提供一份图书管理系统设计与实现的C++代码框架供您参考：

#include <iostream>
#include <fstream>
#include <vector>
#include <string>
using namespace std;

// 图书类
class Book {
public:
    string name; // 书名
    string author; // 作者
    string publisher; // 出版社
    int year; // 出版年份
    double price; // 价格
    int quantity; // 数量

    Book() {} // 默认构造函数
    Book(string n, string a, string p, int y, double pr, int q) { // 带参构造函数
        name = n;
        author = a;
        publisher = p;
        year = y;
        price = pr;
        quantity = q;
    }

    // 显示图书信息
    void show() {
        cout << "书名: " << name << endl;
        cout << "作者: " << author << endl;
        cout << "出版社: " << publisher << endl;
        cout << "出版年份: " << year << endl;
        cout << "价格: " << price << endl;
        cout << "数量: " << quantity << endl;
    }
};

// 图书管理系统类
class Library {
private:
    vector<Book> books; // 图书列表

public:
    // 添加图书
    void add_book(Book book) {
        books.push_back(book);
    }

    // 显示所有图书
    void show_all_books() {
        for (int i = 0; i < books.size(); i++) {
            books[i].show();
            cout << endl;
        }
    }

    // 搜索图书
    void search_book(string name) {
        bool found = false;
        for (int i = 0; i < books.size(); i++) {
            if (books[i].name == name) {
                books[i].show();
                found = true;
            }
        }
        if (!found) {
            cout << "未找到该书籍!" << endl;
        }
    }

    // 删除图书
    void delete_book(string name) {
        for (int i = 0; i < books.size(); i++) {
            if (books[i].name == name) {
                books.erase(books.begin() + i);
                cout << "删除成功!" << endl;
                return;
            }
        }
        cout << "未找到该书籍!" << endl;
    }

    // 保存图书信息到文件
    void save_books_to_file(string filename) {
        ofstream outfile(filename);
        for (int i = 0; i < books.size(); i++) {
            outfile << books[i].name << "," << books[i].author << "," << books[i].publisher << "," << books[i].year << "," << books[i].price << "," << books[i].quantity << endl;
        }
        outfile.close();
        cout << "保存成功!" << endl;
    }

    // 从文件读取图书信息
    void load_books_from_file(string filename) {
        ifstream infile(filename);
        string line;
        while (getline(infile, line)) {
            string name, author, publisher;
            int year, quantity;
            double price;
            int pos1 = line.find(",");
            name = line.substr(0, pos1);
            int pos2 = line.find(",", pos1 + 1);
            author = line.substr(pos1 + 1, pos2 - pos1 - 1);
            int pos3 = line.find(",", pos2 + 1);
            publisher = line.substr(pos2 + 1, pos3 - pos2 - 1);
            int pos4 = line.find(",", pos3 + 1);
            year = stoi(line.substr(pos3 + 1, pos4 - pos3 - 1));
            int pos5 = line.find(",", pos4 + 1);
            price = stod(line.substr(pos4 + 1, pos5 - pos4 - 1));
            quantity = stoi(line.substr(pos5 + 1));
            Book book(name, author, publisher, year, price, quantity);
            add_book(book);
        }
        infile.close();
        cout << "读取成功!" << endl;
    }
};

int main() {
    Library library;
    library.load_books_from_file("books.txt");

    while (true) {
        cout << "请输入操作指令(1: 显示所有图书 2: 搜索图书 3: 删除图书 4: 保存图书信息 0: 退出程序): ";
        int choice;
        cin >> choice;

        if (choice == 1) {
            library.show_all_books();
        } else if (choice == 2) {
            cout << "请输入要搜索的图书名称: ";
            string name;
            cin >> name;
            library.search_book(name);
        } else if (choice == 3) {
            cout << "请输入要删除的图书名称: ";
            string name;
            cin >> name;
            library.delete_book(name);
        } else if (choice == 4) {
            library.save_books_to_file("books.txt");
        } else if (choice == 0) {
            break;
        } else {
            cout << "无效操作指令，请重新输入!" << endl;
        }
    }

    return 0;
}

这份代码实现了一个简单的图书管理系统，包含添加图书、显示所有图书、搜索图书、删除图书、保存图书信息到文件以及从文件读取图书信息等功能。您可以根据您的需求进行修改和扩展。