用c++语言编译图书管理系统项目

好的，下面是一个简单的图书管理系统项目的C++代码示例，供参考：

#include <iostream>
#include <cstdlib>
#include <cstring>
#include <cstdio>

using namespace std;

// 定义图书结构体
struct Book {
    int id; // 书籍编号
    char name[50]; // 书名
    char author[50]; // 作者
    int year; // 出版年份
    int quantity; // 数量
};

// 全局变量
Book books[100];
int book_num = 0;

// 添加图书
void add_book() {
    cout << "请输入书籍编号: ";
    cin >> books[book_num].id;
    cout << "请输入书名: ";
    cin >> books[book_num].name;
    cout << "请输入作者: ";
    cin >> books[book_num].author;
    cout << "请输入出版年份: ";
    cin >> books[book_num].year;
    cout << "请输入数量: ";
    cin >> books[book_num].quantity;
    book_num++;
    cout << "添加成功！" << endl;
}

// 删除图书
void delete_book() {
    int id;
    cout << "请输入要删除的书籍编号: ";
    cin >> id;
    int i;
    for (i = 0; i < book_num; i++) {
        if (books[i].id == id) {
            break;
        }
    }
    if (i == book_num) {
        cout << "未找到该书籍！" << endl;
    } else {
        for (; i < book_num - 1; i++) {
            books[i] = books[i + 1];
        }
        book_num--;
        cout << "删除成功！" << endl;
    }
}

// 修改图书信息
void modify_book() {
    int id;
    cout << "请输入要修改的书籍编号: ";
    cin >> id;
    int i;
    for (i = 0; i < book_num; i++) {
        if (books[i].id == id) {
            break;
        }
    }
    if (i == book_num) {
        cout << "未找到该书籍！" << endl;
    } else {
        cout << "请输入修改后的书名: ";
        cin >> books[i].name;
        cout << "请输入修改后的作者: ";
        cin >> books[i].author;
        cout << "请输入修改后的出版年份: ";
        cin >> books[i].year;
        cout << "请输入修改后的数量: ";
        cin >> books[i].quantity;
        cout << "修改成功！" << endl;
    }
}

// 查询图书信息
void query_book() {
    int id;
    cout << "请输入要查询的书籍编号: ";
    cin >> id;
    int i;
    for (i = 0; i < book_num; i++) {
        if (books[i].id == id) {
            cout << "书籍编号: " << books[i].id << endl;
            cout << "书名: " << books[i].name << endl;
            cout << "作者: " << books[i].author << endl;
            cout << "出版年份: " << books[i].year << endl;
            cout << "数量: " << books[i].quantity << endl;
            break;
        }
    }
    if (i == book_num) {
        cout << "未找到该书籍！" << endl;
    }
}

// 显示所有图书信息
void show_all_books() {
    cout << "书籍编号\t书名\t作者\t出版年份\t数量" << endl;
    for (int i = 0; i < book_num; i++) {
        cout << books[i].id << "\t" << books[i].name << "\t" << books[i].author << "\t" << books[i].year << "\t" << books[i].quantity << endl;
    }
}

// 主函数
int main() {
    int choice;
    while (true) {
        cout << "1. 添加图书" << endl;
        cout << "2. 删除图书" << endl;
        cout << "3. 修改图书信息" << endl;
        cout << "4. 查询图书信息" << endl;
        cout << "5. 显示所有图书信息" << endl;
        cout << "6. 退出" << endl;
        cout << "请选择操作：";
        cin >> choice;
        switch (choice) {
            case 1:
                add_book();
                break;
            case 2:
                delete_book();
                break;
            case 3:
                modify_book();
                break;
            case 4:
                query_book();
                break;
            case 5:
                show_all_books();
                break;
            case 6:
                exit(0);
            default:
                cout << "输入有误，请重新输入！" << endl;
                break;
        }
    }
    return 0;
}

这个代码示例实现了一个简单的图书管理系统，可以实现添加、删除、修改、查询和显示所有图书信息等功能。您可以根据自己的需求进行修改和优化。