用c++语言编写一个可运行的代码实现停车场管理系统应用于车辆的出、入管理。

以下是一个简单的停车场管理系统的C++代码示例：

#include <iostream>
#include <vector>

using namespace std;

class Vehicle {
public:
    string licensePlate;
    string brand;

    Vehicle(string licensePlate, string brand) {
        this->licensePlate = licensePlate;
        this->brand = brand;
    }
};

class ParkingLot {
private:
    vector<Vehicle> vehicles;
    int capacity;
public:
    ParkingLot(int capacity) {
        this->capacity = capacity;
    }

    void parkVehicle(Vehicle vehicle) {
        if (vehicles.size() < capacity) {
            vehicles.push_back(vehicle);
            cout << "Vehicle with license plate " << vehicle.licensePlate << " parked successfully." << endl;
        } else {
            cout << "Parking lot is full. Cannot park vehicle with license plate " << vehicle.licensePlate << endl;
        }
    }

    void removeVehicle(string licensePlate) {
        for (int i = 0; i < vehicles.size(); i++) {
            if (vehicles[i].licensePlate == licensePlate) {
                vehicles.erase(vehicles.begin() + i);
                cout << "Vehicle with license plate " << licensePlate << " removed successfully." << endl;
                return;
            }
        }
        cout << "Vehicle with license plate " << licensePlate << " not found." << endl;
    }

    void printVehicles() {
        cout << "Vehicles in the parking lot:" << endl;
        for (int i = 0; i < vehicles.size(); i++) {
            cout << "License Plate: " << vehicles[i].licensePlate << ", Brand: " << vehicles[i].brand << endl;
        }
    }
};

int main() {
    ParkingLot parkingLot(5);

    Vehicle vehicle1("ABC123", "Toyota");
    Vehicle vehicle2("XYZ789", "Honda");
    Vehicle vehicle3("DEF456", "Ford");

    parkingLot.parkVehicle(vehicle1);
    parkingLot.parkVehicle(vehicle2);
    parkingLot.parkVehicle(vehicle3);

    parkingLot.printVehicles();

    parkingLot.removeVehicle("XYZ789");

    parkingLot.printVehicles();

    return 0;
}

该代码实现了一个简单的停车场管理系统，使用Vehicle类表示车辆，ParkingLot类表示停车场。停车场有一个容量限制，可以通过parkVehicle方法将车辆停入停车场，通过removeVehicle方法将车辆移出停车场，通过printVehicles方法打印停车场中的车辆信息。

在main函数中，我们创建了一个容量为5的停车场对象parkingLot，并实例化了三个车辆对象。然后，我们依次将这三辆车停入停车场，并打印停车场中的车辆信息。接着，我们移出了一辆车辆，并再次打印停车场中的车辆信息。

注意：这只是一个简单的示例代码，实际的停车场管理系统可能需要更复杂的功能和数据结构。