用C++代码写一个火车票管理系统

好的，以下是一个简单的火车票管理系统的C++代码，包含了添加、查询和删除功能：

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

class Train {
public:
    string train_number;
    string departure_time;
    string arrival_time;
    string start_station;
    string end_station;
    int seat_number;
    int price;

    void add_train() {
        cout << "Please input the train number: ";
        cin >> train_number;
        cout << "Please input the departure time: ";
        cin >> departure_time;
        cout << "Please input the arrival time: ";
        cin >> arrival_time;
        cout << "Please input the start station: ";
        cin >> start_station;
        cout << "Please input the end station: ";
        cin >> end_station;
        cout << "Please input the seat number: ";
        cin >> seat_number;
        cout << "Please input the price: ";
        cin >> price;

        ofstream fout("train.txt", ios::app);
        fout << train_number << " " << departure_time << " " << arrival_time << " " << start_station << " " << end_station << " " << seat_number << " " << price << endl;
        fout.close();

        cout << "Train added successfully!" << endl;
    }

    void query_train() {
        cout << "Please input the train number: ";
        string number;
        cin >> number;

        ifstream fin("train.txt");
        string train_info;
        bool flag = false;
        while (getline(fin, train_info)) {
            if (train_info.find(number) != string::npos) {
                cout << train_info << endl;
                flag = true;
            }
        }
        fin.close();

        if (!flag) {
            cout << "Train not found!" << endl;
        }
    }

    void delete_train() {
        cout << "Please input the train number: ";
        string number;
        cin >> number;

        ifstream fin("train.txt");
        ofstream fout("tmp.txt");
        string train_info;
        bool flag = false;
        while (getline(fin, train_info)) {
            if (train_info.find(number) != string::npos) {
                flag = true;
            }
            else {
                fout << train_info << endl;
            }
        }
        fin.close();
        fout.close();

        if (flag) {
            remove("train.txt");
            rename("tmp.txt", "train.txt");
            cout << "Train deleted successfully!" << endl;
        }
        else {
            cout << "Train not found!" << endl;
            remove("tmp.txt");
        }
    }
};

int main() {
    Train train;
    while (true) {
        cout << "Please select an option:" << endl;
        cout << "1. Add train" << endl;
        cout << "2. Query train" << endl;
        cout << "3. Delete train" << endl;
        cout << "4. Exit" << endl;
        int option;
        cin >> option;
        switch (option) {
        case 1:
            train.add_train();
            break;
        case 2:
            train.query_train();
            break;
        case 3:
            train.delete_train();
            break;
        case 4:
            exit(0);
            break;
        default:
            cout << "Invalid option, please try again!" << endl;
            break;
        }
    }
    return 0;
}

注意：这只是一个简单的示例，实际情况中需要更完善的功能和异常处理。