用c++写一个游乐园系统，游客需要注册，登录，充值后买票，票的种类为单人票，团购票和月票，买完票后提示顾客余额，并计算游乐场一天的营业额

好的，这是一个比较复杂的系统，需要细心编写，以下是一个简单的实现，可能还有些不完善的地方，仅供参考。

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

using namespace std;

class User {
public:
    User(string name, string password) : name(name), password(password), balance(0) {}
    string getName() { return name; }
    void setBalance(double balance) { this->balance = balance; }
    double getBalance() { return balance; }
    bool checkPassword(string password) { return this->password == password; }
private:
    string name;
    string password;
    double balance;
};

class Ticket {
public:
    Ticket(string type, double price) : type(type), price(price), count(0) {}
    string getType() { return type; }
    double getPrice() { return price; }
    int getCount() { return count; }
    void addCount(int count) { this->count += count; }
private:
    string type;
    double price;
    int count;
};

class PlayGround {
public:
    PlayGround() {
        users.push_back(User("admin", "admin"));
        tickets.push_back(Ticket("single", 50));
        tickets.push_back(Ticket("group", 180));
        tickets.push_back(Ticket("monthly", 350));
    }
    bool addUser(string name, string password) {
        for (auto user : users) {
            if (user.getName() == name) {
                return false;
            }
        }
        users.push_back(User(name, password));
        return true;
    }
    bool login(string name, string password) {
        for (auto user : users) {
            if (user.getName() == name && user.checkPassword(password)) {
                currentUser = user;
                return true;
            }
        }
        return false;
    }
    bool recharge(double amount) {
        if (currentUser.getBalance() + amount < 0) {
            return false;
        }
        currentUser.setBalance(currentUser.getBalance() + amount);
        return true;
    }
    bool buyTicket(string type, int count) {
        for (auto ticket : tickets) {
            if (ticket.getType() == type) {
                double totalPrice = ticket.getPrice() * count;
                if (currentUser.getBalance() < totalPrice) {
                    return false;
                }
                ticket.addCount(count);
                currentUser.setBalance(currentUser.getBalance() - totalPrice);
                return true;
            }
        }
        return false;
    }
    void displayBalance() {
        cout << "Your balance: " << currentUser.getBalance() << endl;
    }
    void displayDailyIncome() {
        double totalIncome = 0;
        for (auto ticket : tickets) {
            totalIncome += ticket.getPrice() * ticket.getCount();
        }
        cout << "Daily income: " << totalIncome << endl;
    }
private:
    vector<User> users;
    vector<Ticket> tickets;
    User currentUser;
};

int main() {
    PlayGround playGround;
    string name, password;
    cout << "Please register:" << endl;
    cout << "Name: ";
    cin >> name;
    cout << "Password: ";
    cin >> password;
    if (!playGround.addUser(name, password)) {
        cout << "Register failed, the name has been used." << endl;
        return 0;
    }
    cout << "Register succeeded." << endl;
    cout << "Please login:" << endl;
    while (true) {
        cout << "Name: ";
        cin >> name;
        cout << "Password: ";
        cin >> password;
        if (playGround.login(name, password)) {
            cout << "Login succeeded." << endl;
            break;
        }
        cout << "Login failed, please try again." << endl;
    }
    while (true) {
        int choice;
        cout << "1. Recharge" << endl;
        cout << "2. Buy ticket" << endl;
        cout << "3. Display balance" << endl;
        cout << "4. Display daily income" << endl;
        cout << "5. Exit" << endl;
        cout << "Please choose: ";
        cin >> choice;
        switch (choice) {
        case 1:
            double amount;
            cout << "Please input the amount: ";
            cin >> amount;
            if (playGround.recharge(amount)) {
                cout << "Recharge succeeded." << endl;
            }
            else {
                cout << "Recharge failed, please try again." << endl;
            }
            break;
        case 2:
            string type;
            int count;
            cout << "Please choose ticket type (single/group/monthly): ";
            cin >> type;
            cout << "Please input count: ";
            cin >> count;
            if (playGround.buyTicket(type, count)) {
                cout << "Buy ticket succeeded." << endl;
            }
            else {
                cout << "Buy ticket failed, please try again." << endl;
            }
            break;
        case 3:
            playGround.displayBalance();
            break;
        case 4:
            playGround.displayDailyIncome();
            break;
        case 5:
            return 0;
        default:
            cout << "Invalid choice, please try again." << endl;
        }
    }
}

注意：以上代码只是一个简单的实现，可能还有一些不完善的地方，需要根据实际情况进行修改和完善。