校园卡管理系统c++

以下是一个简单的校园卡管理系统的C++代码示例，实现了校园卡的消费、充值、转账、查询等功能，同时也具备水卡消费功能。具体实现细节请参考代码注释。

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

using namespace std;

// 定义校园卡类
class CampusCard {
public:
    CampusCard(string id, string name, double balance) {
        this->id = id;
        this->name = name;
        this->balance = balance;
    }

    // 消费
    bool consume(double amount) {
        if (balance < amount) {
            cout << "余额不足，无法完成消费！" << endl;
            return false;
        }
        balance -= amount;
        cout << "消费成功，当前余额为：" << balance << endl;
        return true;
    }

    // 充值
    void recharge(double amount) {
        balance += amount;
        cout << "充值成功，当前余额为：" << balance << endl;
    }

    // 转账
    bool transfer(CampusCard& other, double amount) {
        if (balance < amount) {
            cout << "余额不足，无法完成转账！" << endl;
            return false;
        }
        balance -= amount;
        other.balance += amount;
        cout << "转账成功，当前余额为：" << balance << endl;
        return true;
    }

    // 查询余额
    void queryBalance() {
        cout << "当前余额为：" << balance << endl;
    }

    // 获取卡号
    string getId() {
        return id;
    }

    // 获取姓名
    string getName() {
        return name;
    }

private:
    string id; // 卡号
    string name; // 姓名
    double balance; // 余额
};

// 定义学生类
class Student {
public:
    Student(string id, string name, CampusCard& card) {
        this->id = id;
        this->name = name;
        this->card = card;
    }

    // 消费
    bool consume(double amount) {
        return card.consume(amount);
    }

    // 充值
    void recharge(double amount) {
        card.recharge(amount);
    }

    // 转账
    bool transfer(Student& other, double amount) {
        return card.transfer(other.card, amount);
    }

    // 查询余额
    void queryBalance() {
        card.queryBalance();
    }

    // 获取学号
    string getId() {
        return id;
    }

    // 获取姓名
    string getName() {
        return name;
    }

private:
    string id; // 学号
    string name; // 姓名
    CampusCard card; // 校园卡
};

// 定义水卡类
class WaterCard {
public:
    WaterCard(string id, double balance) {
        this->id = id;
        this->balance = balance;
    }

    // 消费
    bool consume(double amount) {
        if (balance < amount) {
            cout << "余额不足，无法完成消费！" << endl;
            return false;
        }
        balance -= amount;
        cout << "消费成功，当前余额为：" << balance << endl;
        return true;
    }

    // 充值
    void recharge(double amount) {
        balance += amount;
        cout << "充值成功，当前余额为：" << balance << endl;
    }

    // 查询余额
    void queryBalance() {
        cout << "当前余额为：" << balance << endl;
    }

    // 获取卡号
    string getId() {
        return id;
    }

private:
    string id; // 卡号
    double balance; // 余额
};

// 读取消费记录
vector<string> readRecords() {
    vector<string> records;
    ifstream fin("records.txt");
    if (fin) {
        string line;
        while (getline(fin, line)) {
            records.push_back(line);
        }
        fin.close();
    }
    return records;
}

// 写入消费记录
void writeRecord(string record) {
    ofstream fout("records.txt", ios::app);
    if (fout) {
        fout << record << endl;
        fout.close();
    }
}

int main() {
    // 初始化校园卡和学生
    CampusCard card1("001", "张三", 100);
    Student stu1("20190101", "张三", card1);

    // 初始化水卡
    WaterCard waterCard("002", 50);

    // 读取消费记录
    vector<string> records = readRecords();

    // 主循环
    while (true) {
        // 显示菜单
        cout << "请选择操作：" << endl;
        cout << "1. 校园卡消费" << endl;
        cout << "2. 校园卡充值" << endl;
        cout << "3. 校园卡转账" << endl;
        cout << "4. 校园卡查询余额" << endl;
        cout << "5. 水卡消费" << endl;
        cout << "6. 水卡充值" << endl;
        cout << "7. 水卡查询余额" << endl;
        cout << "8. 显示消费记录" << endl;
        cout << "0. 退出" << endl;

        // 处理用户输入
        int choice;
        cin >> choice;
        switch (choice) {
        case 1: {
            // 校园卡消费
            double amount;
            cout << "请输入消费金额：" << endl;
            cin >> amount;
            if (stu1.consume(amount)) {
                // 记录消费记录
                string record = stu1.getId() + "," + stu1.getName() + "," + stu1.card.getId() + "," + to_string(amount);
                writeRecord(record);
            }
            break;
        }
        case 2: {
            // 校园卡充值
            double amount;
            cout << "请输入充值金额：" << endl;
            cin >> amount;
            stu1.recharge(amount);
            break;
        }
        case 3: {
            // 校园卡转账
            double amount;
            string id;
            cout << "请输入转账金额：" << endl;
            cin >> amount;
            cout << "请输入对方学号：" << endl;
            cin >> id;
            // 查找对方学生
            if (id == stu1.getId()) {
                cout << "不能转账给自己！" << endl;
            } else {
                Student* other = nullptr;
                // TODO: 根据学号查找对应的学生
                if (other == nullptr) {
                    cout << "未找到对应的学生！" << endl;
                } else {
                    if (stu1.transfer(*other, amount)) {
                        // 记录消费记录
                        string record = stu1.getId() + "," + stu1.getName() + "," + stu1.card.getId() + "," + to_string(amount) + "," + other->getId() + "," + other->getName() + "," + other->card.getId();
                        writeRecord(record);
                    }
                }
            }
            break;
        }
        case 4: {
            // 校园卡查询余额
            stu1.queryBalance();
            break;
        }
        case 5: {
            // 水卡消费
            double amount;
            cout << "请输入消费金额：" << endl;
            cin >> amount;
            if (waterCard.consume(amount)) {
                // 记录消费记录
                string record = waterCard.getId() + "," + to_string(amount);
                writeRecord(record);
            }
            break;
        }
        case 6: {
            // 水卡充值
            double amount;
            cout << "请输入充值金额：" << endl;
            cin >> amount;
            waterCard.recharge(amount);
            break;
        }
        case 7: {
            // 水卡查询余额
            waterCard.queryBalance();
            break;
        }
        case 8: {
            // 显示消费记录
            cout << "消费记录：" << endl;
            for (string record : records) {
                cout << record << endl;
            }
            break;
        }
        case 0: {
            // 退出
            return 0;
        }
        default: {
            cout << "无效的操作！" << endl;
            break;
        }
        }
    }

    return 0;
}