parking_reoper

#include <iostream>

using namespace std;

class parking
{
    private:
        string name = "Unecon_Parking";
        string location = "Griboedova_32";
        int space = 50;
        int rate = 25;
        int free_; // для удобного подсчета свободных мест
    public:
        parking()
        {
            string name;
            string location;
            int space;
            int rate;
        };
        parking operator - (int arrived)
        {
            if (free_ - arrived >= 0)
            {
                free_ -= arrived;
                return *this;
            }
            else
                cout << "no parking spaces" << endl;
        }
        parking operator + (int left)
        {
            if (free_ + left <= space)
            {
                free_ += left;
                return *this;
            }
            else
                cout << "can't leave more cars than it was" << endl;
        }
        void set();
        void free();
        ~parking(){}
};

int main()
{
    int left;
    int arrived;
    int temp;
    int option = -1;
    parking parking_;
    parking free_;
    parking_.set();
    while (option != 3)
    {
        cout << "enter the option:" << endl;
        cout << "1. car arrived" << endl;
        cout << "2. car left" << endl;
        cout << "3. exit" << endl;
        cin >> option;
        switch (option)
        {
            case 1:
                cout << "cars arrived: "; cin >> arrived;
                parking_ - arrived;
                break;
            case 2:
                cout << "cars left: "; cin >> left;
                parking_ + left;
                break;
            case 3:
                break;
        }
        parking_.free();
    }
    return 0;
}

void parking::free()
{
    cout << "free spaces: " << free_ << endl;
    return;
}

void parking::set()
{
    cout << "create new parking ..." << endl;
    cout << "name: " << name << endl;
    cout << "location: " << location << endl;
    cout << "space: " << space << endl;
    cout << "rate: " << rate << endl;
    free_ = space;
}