火车订票系统面向对象C++的代码

以下是一个简单的火车订票系统的面向对象C++代码示例：

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

using namespace std;

class Train {
private:
    string name;
    int max_passengers;
    vector<string> passengers;
public:
    Train(string name, int max_passengers) {
        this->name = name;
        this->max_passengers = max_passengers;
    }
    string getName() {
        return name;
    }
    int getMaxPassengers() {
        return max_passengers;
    }
    int getNumPassengers() {
        return passengers.size();
    }
    bool addPassenger(string passenger) {
        if(passengers.size() >= max_passengers) {
            return false;
        }
        passengers.push_back(passenger);
        return true;
    }
};

int main() {
    Train train("K123", 50);
    cout << "Welcome to train booking system. Train " << train.getName() << " can take " << train.getMaxPassengers() << " passengers." << endl;
    while(true) {
        string command;
        cout << "Enter command (book, status, exit): ";
        cin >> command;
        if(command == "book") {
            string passenger;
            cout << "Enter passenger name: ";
            cin >> passenger;
            if(train.addPassenger(passenger)) {
                cout << "Booking successful." << endl;
            } else {
                cout << "Booking failed. Train is full." << endl;
            }
        } else if(command == "status") {
            cout << "Train " << train.getName() << " has " << train.getNumPassengers() << " passengers." << endl;
        } else if(command == "exit") {
            break;
        } else {
            cout << "Invalid command. Please try again." << endl;
        }
    }
    return 0;
}

这个程序定义了一个Train类，它有一个名称，最大乘客数和一个存储乘客名字的向量。类中有一些方法，例如addPassenger()将一个乘客名字添加到向量中，getNumPassengers()返回当前已订票的乘客数。在主函数中，程序通过输入不同的命令（book，status或exit）来与用户交互。如果输入book命令，则程序将要求输入乘客姓名并将其添加到Train对象中。如果输入status命令，则程序将打印当前已订票的乘客数。如果输入exit命令，则程序将退出。