用c++编写一个停车管理系统

以下是一个简单的停车管理系统的C++代码示例：

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

using namespace std;

class ParkingLot {
private:
    int capacity;
    vector<string> parkedCars;

public:
    ParkingLot(int capacity) {
        this->capacity = capacity;
    }

    bool isFull() {
        return parkedCars.size() == capacity;
    }

    void parkCar(string licensePlate) {
        if (isFull()) {
            cout << "Sorry, the parking lot is full." << endl;
        } else {
            parkedCars.push_back(licensePlate);
            cout << "Car with license plate " << licensePlate << " has been parked." << endl;
        }
    }

    void unparkCar(string licensePlate) {
        bool found = false;
        for (int i = 0; i < parkedCars.size(); i++) {
            if (parkedCars[i] == licensePlate) {
                parkedCars.erase(parkedCars.begin() + i);
                cout << "Car with license plate " << licensePlate << " has been unparked." << endl;
                found = true;
                break;
            }
        }
        if (!found) {
            cout << "Car with license plate " << licensePlate << " is not parked here." << endl;
        }
    }

    void printStatus() {
        cout << "Parking lot has " << capacity - parkedCars.size() << " empty spots." << endl;
        cout << "Parked cars:" << endl;
        for (string licensePlate : parkedCars) {
            cout << "- " << licensePlate << endl;
        }
    }
};

int main() {
    ParkingLot parkingLot(5);

    parkingLot.parkCar("ABC-123");
    parkingLot.parkCar("DEF-456");
    parkingLot.parkCar("GHI-789");
    parkingLot.printStatus();

    parkingLot.unparkCar("DEF-456");
    parkingLot.printStatus();

    parkingLot.parkCar("JKL-012");
    parkingLot.parkCar("MNO-345");
    parkingLot.parkCar("PQR-678");
    parkingLot.printStatus();

    parkingLot.parkCar("STU-901");

    return 0;
}

此代码中，`ParkingLot`类代表了一个停车场，它有一个最大容量和一个记录当前停放车辆的`vector`。`isFull()`函数检查停车场是否已满，`parkCar()`函数将车辆停入停车场，`unparkCar()`函数将车辆从停车场取出，`printStatus()`函数列出当前停放车辆和剩余停车位数量。

在`main()`函数中，我们创建了一个容量为5的停车场，并进行了一些停放和取出车辆的操作，最后列出了当前停放车辆和剩余停车位数量的信息。