4、公交车管理系统问题描述：设计一个公交车管理系统，公交车需设置不同的类型，每个线路的公交车会经过多个不同的车站，车站、公交车可设计成不同的类，给出某个公交车可以显示它所经过所有站点。基本功能：（1）公交车要设置不同的类型，如电车、油车等；（2）公交车信息包括：车牌号，类型，线路号，座位数,长度，宽度，高度，油耗等；（3）公交车信息要保存在文件中；（4）系统可以实现对公交车和车站信息的添加，修改，删除，查找等功能；（5）系统界面应该尽量友好，方便使用。用c++写一个简单的程序代码

好的，以下是一个简单的程序代码：

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

using namespace std;

// 车站类
class Station {
public:
    Station(string name, int id) : name(name), id(id) {}
    string getName() { return name; }
    int getId() { return id; }
private:
    string name;
    int id;
};

// 公交车类
class Bus {
public:
    Bus(string plateNum, string type, int routeNum, int seatNum, int length, int width, int height, int fuelConsumption)
        : plateNum(plateNum), type(type), routeNum(routeNum), seatNum(seatNum), length(length), width(width), height(height), fuelConsumption(fuelConsumption) {}
    string getPlateNum() { return plateNum; }
    string getType() { return type; }
    int getRouteNum() { return routeNum; }
    int getSeatNum() { return seatNum; }
    int getLength() { return length; }
    int getWidth() { return width; }
    int getHeight() { return height; }
    int getFuelConsumption() { return fuelConsumption; }
    vector<Station*> getStations() { return stations; }
    void addStation(Station* station) { stations.push_back(station); }
private:
    string plateNum;
    string type;
    int routeNum;
    int seatNum;
    int length;
    int width;
    int height;
    int fuelConsumption;
    vector<Station*> stations;
};

// 车辆管理类
class BusManager {
public:
    void addBus(Bus* bus) { buses.push_back(bus); }
    void removeBus(string plateNum) {
        for (auto it = buses.begin(); it != buses.end(); ++it) {
            if ((*it)->getPlateNum() == plateNum) {
                buses.erase(it);
                break;
            }
        }
    }
    Bus* findBus(string plateNum) {
        for (auto it = buses.begin(); it != buses.end(); ++it) {
            if ((*it)->getPlateNum() == plateNum) {
                return *it;
            }
        }
        return nullptr;
    }
    void saveToFile(string filename) {
        ofstream fout(filename);
        for (auto bus : buses) {
            fout << bus->getPlateNum() << " " << bus->getType() << " " << bus->getRouteNum() << " "
                << bus->getSeatNum() << " " << bus->getLength() << " " << bus->getWidth() << " "
                << bus->getHeight() << " " << bus->getFuelConsumption() << " ";
            for (auto station : bus->getStations()) {
                fout << station->getId() << " ";
            }
            fout << endl;
        }
        fout.close();
    }
    void loadFromFile(string filename) {
        ifstream fin(filename);
        string plateNum, type;
        int routeNum, seatNum, length, width, height, fuelConsumption;
        while (fin >> plateNum >> type >> routeNum >> seatNum >> length >> width >> height >> fuelConsumption) {
            Bus* bus = new Bus(plateNum, type, routeNum, seatNum, length, width, height, fuelConsumption);
            int stationId;
            while (fin >> stationId) {
                Station* station = stationManager.findStation(stationId);
                if (station == nullptr) {
                    cout << "Error: Station not found!" << endl;
                    return;
                }
                bus->addStation(station);
            }
            addBus(bus);
        }
        fin.close();
    }
private:
    vector<Bus*> buses;
};

// 车站管理类
class StationManager {
public:
    void addStation(Station* station) { stations.push_back(station); }
    void removeStation(int id) {
        for (auto it = stations.begin(); it != stations.end(); ++it) {
            if ((*it)->getId() == id) {
                stations.erase(it);
                break;
            }
        }
    }
    Station* findStation(int id) {
        for (auto it = stations.begin(); it != stations.end(); ++it) {
            if ((*it)->getId() == id) {
                return *it;
            }
        }
        return nullptr;
    }
    void saveToFile(string filename) {
        ofstream fout(filename);
        for (auto station : stations) {
            fout << station->getName() << " " << station->getId() << endl;
        }
        fout.close();
    }
    void loadFromFile(string filename) {
        ifstream fin(filename);
        string name;
        int id;
        while (fin >> name >> id) {
            addStation(new Station(name, id));
        }
        fin.close();
    }
private:
    vector<Station*> stations;
};

// 界面类
class Interface {
public:
    Interface() {
        busManager.loadFromFile("buses.txt");
        stationManager.loadFromFile("stations.txt");
    }
    ~Interface() {
        busManager.saveToFile("buses.txt");
        stationManager.saveToFile("stations.txt");
    }
    void showMenu() {
        cout << "========== 公交车管理系统 ==========" << endl;
        cout << "1. 添加公交车" << endl;
        cout << "2. 删除公交车" << endl;
        cout << "3. 查找公交车" << endl;
        cout << "4. 添加车站" << endl;
        cout << "5. 删除车站" << endl;
        cout << "6. 查找车站" << endl;
        cout << "7. 退出系统" << endl;
    }
    void addBus() {
        string plateNum, type;
        int routeNum, seatNum, length, width, height, fuelConsumption;
        cout << "请输入公交车车牌号：";
        cin >> plateNum;
        if (busManager.findBus(plateNum) != nullptr) {
            cout << "错误：该车牌号已存在！" << endl;
            return;
        }
        cout << "请输入公交车类型：";
        cin >> type;
        cout << "请输入公交车线路号：";
        cin >> routeNum;
        cout << "请输入公交车座位数：";
        cin >> seatNum;
        cout << "请输入公交车长度：";
        cin >> length;
        cout << "请输入公交车宽度：";
        cin >> width;
        cout << "请输入公交车高度：";
        cin >> height;
        cout << "请输入公交车油耗：";
        cin >> fuelConsumption;
        Bus* bus = new Bus(plateNum, type, routeNum, seatNum, length, width, height, fuelConsumption);
        while (true) {
            int stationId;
            cout << "请输入公交车经过的车站编号（输入-1结束）：";
            cin >> stationId;
            if (stationId == -1) {
                break;
            }
            Station* station = stationManager.findStation(stationId);
            if (station == nullptr) {
                cout << "错误：该车站不存在！" << endl;
                continue;
            }
            bus->addStation(station);
        }
        busManager.addBus(bus);
        cout << "添加成功！" << endl;
    }
    void removeBus() {
        string plateNum;
        cout << "请输入要删除的公交车车牌号：";
        cin >> plateNum;
        busManager.removeBus(plateNum);
        cout << "删除成功！" << endl;
    }
    void findBus() {
        string plateNum;
        cout << "请输入要查找的公交车车牌号：";
        cin >> plateNum;
        Bus* bus = busManager.findBus(plateNum);
        if (bus == nullptr) {
            cout << "未找到该公交车！" << endl;
        } else {
            cout << "车牌号：" << bus->getPlateNum() << endl;
            cout << "类型：" << bus->getType() << endl;
            cout << "线路号：" << bus->getRouteNum() << endl;
            cout << "座位数：" << bus->getSeatNum() << endl;
            cout << "长度：" << bus->getLength() << endl;
            cout << "宽度：" << bus->getWidth() << endl;
            cout << "高度：" << bus->getHeight() << endl;
            cout << "油耗：" << bus->getFuelConsumption() << endl;
            cout << "经过的车站：" << endl;
            for (auto station : bus->getStations()) {
                cout << station->getName() << " ";
            }
            cout << endl;
        }
    }
    void addStation() {
        string name;
        int id;
        cout << "请输入车站名称：";
        cin >> name;
        cout << "请输入车站编号：";
        cin >> id;
        stationManager.addStation(new Station(name, id));
        cout << "添加成功！" << endl;
    }
    void removeStation() {
        int id;
        cout << "请输入要删除的车站编号：";
        cin >> id;
        stationManager.removeStation(id);
        cout << "删除成功！" << endl;
    }
    void findStation() {
        int id;
        cout << "请输入要查找的车站编号：";
        cin >> id;
        Station* station = stationManager.findStation(id);
        if (station == nullptr) {
            cout << "未找到该车站！" << endl;
        } else {
            cout << "车站名称：" << station->getName() << endl;
            cout << "车站编号：" << station->getId() << endl;
        }
    }
private:
    BusManager busManager;
    StationManager stationManager;
};

int main() {
    Interface interface;
    while (true) {
        interface.showMenu();
        int choice;
        cout << "请选择操作：";
        cin >> choice;
        switch (choice) {
        case 1:
            interface.addBus();
            break;
        case 2:
            interface.removeBus();
            break;
        case 3:
            interface.findBus();
            break;
        case 4:
            interface.addStation();
            break;
        case 5:
            interface.removeStation();
            break;
        case 6:
            interface.findStation();
            break;
        case 7:
            cout << "感谢使用本系统！" << endl;
            return 0;
        default:
            cout << "输入错误，请重新输入！" << endl;
        }
    }
    return 0;
}

这个程序并不完整，需要你自己完成文件操作和界面交互部分。同时，你可能需要根据实际需求对类进行修改和扩展。