Banking App OOP c++

#include <iostream>
#include <string>

using namespace std;

class BankAccount {
    // Define a class representing a bank account
private:
    string accountNumber; // Stores the account number
    string holderName;    // Stores the name of the account holder
    double balance;       // Stores the account balance

public:
    BankAccount(string accountNumber, string holderName) {
        // Constructor to initialize the account with account number and holder name
        this->accountNumber = accountNumber; // Initialize account number
        this->holderName = holderName;       // Initialize holder name
        this->balance = 0.0;                  // Initialize balance to 0
    }

    void deposit(double amount) {
        // Method to deposit funds into the account
        balance += amount; // Add the deposited amount to the balance
        cout << amount << " deposited successfully." << endl; // Print a success message
    }

    void withdraw(double amount) {
        // Method to withdraw funds from the account
        if (balance >= amount) { // Check if the balance is sufficient for withdrawal
            balance -= amount; // Subtract the withdrawal amount from the balance
            cout << amount << " withdrawn successfully." << endl; // Print a success message
        } else {
            cout << "Insufficient funds." << endl; // Print an error message if balance is insufficient
        }
    }

    double getBalance() {
        // Method to get the current balance of the account
        return balance; // Return the current balance
    }

    string getAccountNumber() {
        // Method to get the account number
        return accountNumber; // Return the account number
    }

    string getHolderName() {
        // Method to get the holder name
        return holderName; // Return the holder name
    }
};

int main() {
    // Main function for the banking application

    cout << "Welcome to Our Bank!" << endl; // Display a welcome message

    string accountNumber, holderName;
    cout << "Enter your account number: ";
    cin >> accountNumber; // Prompt user to enter account number
    cout << "Enter your name: ";
    cin >> holderName; // Prompt user to enter their name

    BankAccount account(accountNumber, holderName); // Create a BankAccount object

    int choice;
    // Display a menu for banking operations
    while (true) {
        cout << "\n1. Deposit" << endl;
        cout << "2. Withdraw" << endl;
        cout << "3. Check Balance" << endl;
        cout << "4. Exit" << endl;
        cout << "Enter your choice: ";
        cin >> choice; // Read user's choice

        switch (choice) {
            case 1: // If user chooses deposit
                double depositAmount;
                cout << "Enter deposit amount: ";
                cin >> depositAmount; // Read deposit amount
                account.deposit(depositAmount); // Call deposit method
                break;
            case 2: // If user chooses withdraw
                double withdrawAmount;
                cout << "Enter withdrawal amount: ";
                cin >> withdrawAmount; // Read withdrawal amount
                account.withdraw(withdrawAmount); // Call withdraw method
                break;
            case 3: // If user chooses check balance
                cout << "Account Holder: " << account.getHolderName() << endl;
                cout << "Account Number: " << account.getAccountNumber() << endl;
                cout << "Balance: " << account.getBalance() << endl;
                break;
            case 4: // If user chooses exit
                cout << "Thank you for using our bank!" << endl;
                return 0; // Exit the program
            default: // If user enters an invalid choice
                cout << "Invalid choice. Please try again." << endl;
        }
    }

    return 0;
}