Write a C++ program to implement a class called BankAccount that represents a simple bank account. The class should have private member variables for account number and balance. Include member functions to deposit and withdraw money from the account.Testcase:Input:Rs.1000.0  // initial balanceRs.500.0  // depositRs.200.0   // withdrawOutput:Rs.1300.0  // final balance Input:Rs.2000.0  // initial balanceRs.1000.0  // depositRs.4000.0   // withdrawOutput:NA  // final balance

Here is a simple C++ program that implements a BankAccount class with deposit and withdraw functions:

#include<iostream>
using namespace std;

class BankAccount {
    private:
        int accountNumber;
        double balance;

    public:
        BankAccount(int accountNumber, double initialBalance) {
            this->accountNumber = accountNumber;
            this->balance = initialBalance;
        }

        void deposit(double amount) {
            balance += amount;
        }

        bool withdraw(double amount) {
            if(amount > balance) {
                cout << "Insufficient balance." << endl;
                return false;
            } else {
                balance -= amount;
                return true;
            }
        }

        double getBalance() {
            return balance;
        }
};

int main() {
    BankAccount account(1, 1000.0); // initial balance
    account.deposit(500.0); // deposit
    if(account.withdraw(200.0)) { // withdraw
        cout << "Final balance: Rs." << account.getBalance() << endl;
    }

    BankAccount account2(2, 2000.0); // initial balance
    account2.deposit(1000.0); // deposit
    if(!account2.withdraw(4000.0)) { // withdraw
        cout << "Withdrawal amount exceeds the current balance." << endl;
    }

    return 0;
}

In this program, the BankAccount class has two private member variables: accountNumber and balance. The class has a constructor that initializes these variables, and three member functions: deposit, withdraw, and getBalance. The deposit function adds the deposit amount to the balance. The withdraw function checks if the withdrawal amount is greater than the balance. If it is, it prints an error message and returns false; otherwise, it subtracts the withdrawal amount from the balance and returns true. The getBalance function returns the current balance.

The main function creates two BankAccount objects with initial balances of Rs.1000.0 and Rs.2000.0, respectively. It then deposits Rs.500.0 into the first account and Rs.1000.0 into the second account. It attempts to withdraw Rs.200.0 from the first account and Rs.4000.0 from the second account. If the withdrawal is successful, it prints the final balance; otherwise, it prints an error message.