Is this code qualified as OOP in C++?

#include <iostream>
#include <string>

// FUNCTIONS
void menu();
void account(int option);

using namespace std;
string AccountType[] = {"", "CHECKINGS", "SAVINGS"};
string response;

int AccountDetails[] = {
	1234,		// pin number
	10000,		// checking account balance
	55000,		// savings account balance
};

bool validatePin(int pin) {
	if (pin == AccountDetails[0]) {
		return true;
	} else {
		return false;
	}
}

bool proceed(string response) {
	if(response =="y" || response == "Y"){
		return true;
	} else if(response == "n" || response == "N"){
		string exit;
		cout << "\n\n\n\t Thank you for banking with us.";
		cin >> exit;
		return false;
	}

}

class AccountSettings {
	private:
		int type;		// account type
		int balance;	// account balance
	public:
		AccountSettings(int type) {
			// type 1 = checkings
			// type 2 = savings
			this->type = type;
			this->balance = AccountDetails[this->type];
		}
		int getWithdraw() {
			int withdrawAmount;
			cout << "Please enter amount to withdrawn:\n " << endl;
			cin >> withdrawAmount;

			// get account type
			if(withdrawAmount <= this->balance){
				int AccountBalance = this->balance -= withdrawAmount;
				cout << "Dispensing... ";
				cout << "₱"<< withdrawAmount << endl;
				
				// update the account balance
				AccountDetails[this->type] = AccountBalance;
				getBalance();

			} else {
				cout << "Insufficent funds" << endl;
				getBalance();
			}

			return 0;
		}

		int getDeposit() {
			int depositAmount;
			cout << "Please enter an amount to deposit:\n" << endl;
			cin >> depositAmount;

			int AccountBalance = this->balance += depositAmount;

			// update the account balance
			AccountDetails[this->type] = AccountBalance;

			cout << "\t₱" << depositAmount << " was deposited into your account";
			getBalance();
			 
			return 0;
		}

		int getTransfer() {
			int AmountTransfer;
			int TransferTo = this->type== 1 ? 2 : 1;

			cout << "Enter amount to transfer to your "<< AccountType[TransferTo] << " account."<< endl;
			cin >>  AmountTransfer;

			if(AmountTransfer <= AccountDetails[this->type]) {
				// update the current account balance in the selected account
				int NewBalance = this->balance -= AmountTransfer;
				AccountDetails[this->type] = NewBalance;

				// Set the new transfered amount to transfered account
				int TransferedAmount = AccountDetails[TransferTo] += AmountTransfer;
				AccountDetails[TransferTo] = TransferedAmount;

				cout << "₱" << AmountTransfer << " has been transfered to your "<< AccountType[TransferTo] << " account." << endl;
				getBalance();

			} else {
				cout << "Insuffient funds." << endl;
				getBalance();
			}

			return 0;
		}

		int getBalance() {
			string confirmBalance;
			// get the account type, and return balance
			cout << "Would you like to check your "<< AccountType[this->type] << " account balance? (y/n)\n" << endl;
			cin >> confirmBalance;
			if(confirmBalance=="y" || confirmBalance=="Y"){
				cout << "Your account balance is: ₱" << this->balance << endl;
			} 
			
			cout << "\n\nWould you like to continue (y/n)?\n";
			cin >> response;

			if (proceed(response)) {
				account(this->type); // return to account menu
			}

			return 0;
		}
};

void account(int option) {
		// account option = 1 (checkings)
		// account option = 2 (savings)
			cout << "\n\n" <<AccountType[option] << "--\n\t1. Check balance"
				<<"\n\t2. Withdraw from " << AccountType[option] 
				<<"\n\t3. Deposit to " << AccountType[option] 
				<<"\n\t4. Transfer " 
				<<"\n\t5. Return to Menu." << endl;

		// Pass in account type
		AccountSettings Account(option); 

		int selectMenu;
		cin >> selectMenu;
		
		switch(selectMenu){
			case 1:
				cout << Account.getBalance();
				break;
			case 2: 
				cout << Account.getWithdraw();
				break;
			case 3: 
				cout << Account.getDeposit();
				break;
			case 4:
				cout << Account.getTransfer();
				break;
			case 5:
				menu(); // return to main menu
				break;
			default:
				cout << "Would you like to continue? (y/n)\n";
				cin >> response;
				proceed(response);
			
				if (proceed(response)) {
					menu(); // return to main menu
				} 
				break;
		}
}

void menu() {
	int option;
	cout << "\n\nMain Menu" <<endl;
	cout << "\tPlease select a trasaction " << endl;
	cout << "\t1. Checkings \n\t2. Savings \n\t3. Exit" << endl;
	cin >> option;
	switch(option){
		case 1: account(option); // checkings
			break;
		case 2: account(option); // savings
			break;
		default:
			cout << "Would you like to continue? (y/n)\n";
			cin >> response;
			proceed(response);
			
			if (proceed(response)) {
				menu();
			} 
			break;
	}
}


// Begin MAIN
int main() {
	int pin;
	int count=1;
	
	cout << "Welcome to Bank of BSIE.\n\tPlease enter your pin number to access your account:" << endl;
	do {
		cin >> pin;

		if(validatePin(pin)) {
			menu(); // continue to main menu
		} else {
			cout << "Invalid pin. Please enter pin number:" << endl; 
		}
	} while (++count<=3); 									//given 3 attempts for the wrong pin
    
    if(count==4)
        cout<<"\tExceed  the limit, please try again after 24 hours";
	    cout<<"\nThank you for visiting\n"<<endl;
	    
	return 0;
}