用c++完成火车车票系统本管理系统有以下功能: 1 班次录入 9 2 浏览班次信息3 查询火车信息购买火车票5 退订火车票6 退出系统

好的，下面是一个简单的火车车票系统的实现，包含了你提到的所有功能：

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

using namespace std;

// 班次结构体
struct Train {
    string trainNumber; // 班次号
    string startStation; // 始发站
    string endStation; // 终点站
    string departureTime; // 发车时间
    int seatNum; // 座位数
    int price; // 票价
};

// 班次数组
vector<Train> trains;

// 读取班次信息
void readTrains() {
    ifstream infile("trains.txt");
    while (!infile.eof()) {
        Train train;
        infile >> train.trainNumber >> train.startStation >> train.endStation >> train.departureTime >> train.seatNum >> train.price;
        if (!train.trainNumber.empty()) {
            trains.push_back(train);
        }
    }
    infile.close();
}

// 保存班次信息
void saveTrains() {
    ofstream outfile("trains.txt");
    for (int i = 0; i < trains.size(); i++) {
        Train& train = trains[i];
        outfile << train.trainNumber << " " << train.startStation << " " << train.endStation << " " << train.departureTime << " " << train.seatNum << " " << train.price << endl;
    }
    outfile.close();
}

// 显示菜单
void showMenu() {
    cout << "1. 班次录入" << endl;
    cout << "2. 浏览班次信息" << endl;
    cout << "3. 查询火车信息" << endl;
    cout << "4. 购买火车票" << endl;
    cout << "5. 退订火车票" << endl;
    cout << "6. 退出系统" << endl;
    cout << "请选择操作：";
}

// 班次录入
void addTrain() {
    Train train;
    cout << "请输入班次号：";
    cin >> train.trainNumber;
    cout << "请输入始发站：";
    cin >> train.startStation;
    cout << "请输入终点站：";
    cin >> train.endStation;
    cout << "请输入发车时间：";
    cin >> train.departureTime;
    cout << "请输入座位数：";
    cin >> train.seatNum;
    cout << "请输入票价：";
    cin >> train.price;
    trains.push_back(train);
    cout << "班次录入成功！" << endl;
}

// 浏览班次信息
void viewTrains() {
    cout << "班次号 始发站 终点站 发车时间 座位数 票价" << endl;
    for (int i = 0; i < trains.size(); i++) {
        Train& train = trains[i];
        cout << train.trainNumber << " " << train.startStation << " " << train.endStation << " " << train.departureTime << " " << train.seatNum << " " << train.price << endl;
    }
}

// 查询火车信息
void searchTrain() {
    string startStation, endStation;
    cout << "请输入起点站：";
    cin >> startStation;
    cout << "请输入终点站：";
    cin >> endStation;
    bool found = false;
    for (int i = 0; i < trains.size(); i++) {
        Train& train = trains[i];
        if (train.startStation == startStation && train.endStation == endStation) {
            cout << train.trainNumber << " " << train.startStation << " " << train.endStation << " " << train.departureTime << " " << train.seatNum << " " << train.price << endl;
            found = true;
        }
    }
    if (!found) {
        cout << "没有符合条件的班次！" << endl;
    }
}

// 购买火车票
void buyTicket() {
    string trainNumber;
    int num;
    cout << "请输入班次号：";
    cin >> trainNumber;
    cout << "请输入购买数量：";
    cin >> num;
    bool found = false;
    for (int i = 0; i < trains.size(); i++) {
        Train& train = trains[i];
        if (train.trainNumber == trainNumber) {
            if (train.seatNum >= num) {
                train.seatNum -= num;
                int totalPrice = train.price * num;
                cout << "购买成功，总价：" << totalPrice << "元。" << endl;
                found = true;
            } else {
                cout << "座位不足，购买失败！" << endl;
                found = true;
            }
            break;
        }
    }
    if (!found) {
        cout << "没有找到该班次！" << endl;
    } else {
        saveTrains();
    }
}

// 退订火车票
void refundTicket() {
    string trainNumber;
    int num;
    cout << "请输入班次号：";
    cin >> trainNumber;
    cout << "请输入退订数量：";
    cin >> num;
    bool found = false;
    for (int i = 0; i < trains.size(); i++) {
        Train& train = trains[i];
        if (train.trainNumber == trainNumber) {
            train.seatNum += num;
            cout << "退订成功！" << endl;
            found = true;
            break;
        }
    }
    if (!found) {
        cout << "没有找到该班次！" << endl;
    } else {
        saveTrains();
    }
}

int main() {
    readTrains();
    while (true) {
        showMenu();
        int choice;
        cin >> choice;
        switch (choice) {
            case 1:
                addTrain();
                saveTrains();
                break;
            case 2:
                viewTrains();
                break;
            case 3:
                searchTrain();
                break;
            case 4:
                buyTicket();
                break;
            case 5:
                refundTicket();
                break;
            case 6:
                cout << "谢谢使用！" << endl;
                return 0;
            default:
                cout << "无效的选择！" << endl;
                break;
        }
    }
    return 0;
}

注意：以上代码只是一个简单的示例，仅供参考，实际开发中可能需要更完善的错误处理、数据验证、用户界面等方面的实现。