图书馆管理系统C++

以下是一个简单的图书馆管理系统的C++代码，包括添加图书、删除图书、查找图书和修改图书等功能：

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

// 图书结构体
struct Book {
    string name;    // 书名
    double price;   // 价格
    int number;     // 编号
};

// 图书数组结构体
struct Arraybooks {
    Book *book;     // 图书数组指针
    int length;     // 图书数组长度
};

// 初始化图书数组
void initArray(Arraybooks *abs) {
    abs->book = new Book[100];
    abs->length = 0;
}

// 添加图书
void addBook(Arraybooks *abs) {
    cout << "请输入书名：" << endl;
    string name;
    cin >> name;
    cout << "请输入价格：" << endl;
    double price;
    cin >> price;
    cout << "请输入编号：" << endl;
    int number;
    cin >> number;
    abs->book[abs->length].name = name;
    abs->book[abs->length].price = price;
    abs->book[abs->length].number = number;
    abs->length++;
    cout << "添加成功！" << endl;
}

// 删除图书
void deleteBook(Arraybooks *abs) {
    cout << "请输入要删除的书名：" << endl;
    string name;
    cin >> name;
    int index = -1;
    for (int i = 0; i < abs->length; i++) {
        if (abs->book[i].name == name) {
            index = i;
            break;
        }
    }
    if (index == -1) {
        cout << "查无此书！" << endl;
    } else {
        for (int i = index; i < abs->length - 1; i++) {
            abs->book[i] = abs->book[i + 1];
        }
        abs->length--;
        cout << "删除成功！" << endl;
    }
}

// 查找图书
void findBook(Arraybooks *abs) {
    cout << "请输入要查找的书名：" << endl;
    string name;
    cin >> name;
    int index = -1;
    for (int i = 0; i < abs->length; i++) {
        if (abs->book[i].name == name) {
            index = i;
            break;
        }
    }
    if (index == -1) {
        cout << "查无此书！" << endl;
    } else {
        cout << "书名为：" << abs->book[index].name << "\t";
        cout << "价格为：" << abs->book[index].price << "\t";
        cout << "编号为：" << abs->book[index].number << endl;
    }
}

// 修改图书
void modifyBook(Arraybooks *abs) {
    cout << "请输入要修改的书名：" << endl;
    string name;
    cin >> name;
    int index = -1;
    for (int i = 0; i < abs->length; i++) {
        if (abs->book[i].name == name) {
            index = i;
            break;
        }
    }
    if (index == -1) {
        cout << "查无此书！" << endl;
    } else {
        cout << "请输入新的书名：" << endl;
        string newName;
        cin >> newName;
        cout << "请输入新的价格：" << endl;
        double newPrice;
        cin >> newPrice;
        cout << "请输入新的编号：" << endl;
        int newNumber;
        cin >> newNumber;
        abs->book[index].name = newName;
        abs->book[index].price = newPrice;
        abs->book[index].number = newNumber;
        cout << "修改成功！" << endl;
    }
}

// 显示图书
void showBooks(Arraybooks *abs) {
    if (abs->length == 0) {
        cout << "书架为空" << endl;
    } else {
        for (int i = 0; i < abs->length; ++i) {
            cout << "书籍名字 ： " << abs->book[i].name << "\t";
            cout << "书籍价格 ： " << abs->book[i].price << "\t";
            cout << "书籍编号 ： " << abs->book[i].number << endl;
        }
    }
}

// 判断图书是否存在
int isExist(Arraybooks *abs, string name) {
    int index = -1;
    for (int i = 0; i < abs->length; i++) {
        if (abs->book[i].name == name) {
            index = i;
            break;
        }
    }
    return index;
}

int main() {
    Arraybooks abs;
    initArray(&abs);
    while (true) {
        cout << "请选择操作：" << endl;
        cout << "1.添加图书" << endl;
        cout << "2.删除图书" << endl;
        cout << "3.查找图书" << endl;
        cout << "4.修改图书" << endl;
        cout << "5.显示图书" << endl;
        cout << "6.退出" << endl;
        int choice;
        cin >> choice;
        switch (choice) {
            case 1:
                addBook(&abs);
                break;
            case 2:
                deleteBook(&abs);
                break;
            case 3:
                findBook(&abs);
                break;
            case 4:
                modifyBook(&abs);
                break;
            case 5:
                showBooks(&abs);
                break;
            case 6:
                return 0;
            default:
                cout << "输入有误，请重新输入！" << endl;
                break;
        }
    }
    return 0;
}