#include <iostream>

using std::cout;
using std::cin;
using std::endl;

class BankAccount {
protected:
	double balance;
public:
	BankAccount() {
		balance = 0;
	}
	double getBalance() {
		return balance;
	}

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

	void withdrawl(double amt) {
		balance -= amt;
	}
};

class NoOverdraftAccount : public BankAccount {
public:
	void withdrawl(double amt) {
		if (amt <= getBalance()) {
			BankAccount::withdrawl(amt);
		}
	}
};

class NoWithdrawlAccount : public BankAccount {
public:
	void withdrawl(double amt) {
	}
    
/*   or to prevent use of withdrawl completely ...

private:
    void withdrawl(double amt) {
    }
*/

};

class InterestAccount : public BankAccount {
private:
	double rate;
public:
	InterestAccount(double r) {
		rate = r;
	}
	void earnInterest() {
		balance = balance * (1+rate/100.0);
	}
};

int main() {
	InterestAccount acct(5.2);
	acct.deposit(500);
	acct.deposit(300); 
	acct.earnInterest();
	cout << acct.getBalance() << endl;
}