Bank Account Coding Issues

[NyctoDhira]

Hello, I'm having a hard time figuring out what to do for my bank account program. I haven't gotten far into it, but I have several problems/issues with my code.

1. I have to load and save all the data to and from a binary file, but I was testing out how it would output without being a binary file and it appears unreadable. How could I fix this and successfully turn it into a binary file?

2. I have to load the binary file into an STL vector, but I'm still confused on how to do that. I plan to use a vector for multiple customers that would use an ID or name that would be associated with multiple accounts (such as saving and checking accounts), but I'm completely stuck on doing it.

3. Is there any advice you would give me on how to make this polymorphic? I'm using the print function as a pure virtual function, but are their other ways to implement polymorphism? Also, what other ways could I make this program connect, in terms of composition and inheritance?

I'm sorry for this HUGE amount of questions, but I really do appreciate it if anyone could give me even a small amount of help. Thanks in advance!

My code so far:

#include <iostream>
#include <string>
#include <vector>
#include <fstream>
#include <ctime>
using namespace std;

const int NAMESIZE = 30;
class BankManage
{
protected:
	char fName[NAMESIZE], lName[NAMESIZE];
	int accountID;
	double balance;
public:
	// Default Constructor for BankAccount
	BankManage()
	{
		accountID = 0;
		balance = 0.00;
	}

	// Copy Constructor for BankAccount
	BankManage(char first, char last, int id, double bal)
	{
		fName[NAMESIZE] = first;
		lName[NAMESIZE] = last;
		accountID = id;
		balance = bal;
	}

	int getID()
	{
		return accountID;
	}

	double getBalance()
	{
		return balance;
	}

	void createNewAccount()
	{
		// Add an new customer
		int id;
		cout << "\n\nThank you for choosing Samediff Bank!\n";
		cout << "Please enter your first name: ";
		cin.ignore();
		cin.getline(fName, NAMESIZE);
		cout << "Please enter your last name: ";
		cin.ignore();
		cin.getline(lName, NAMESIZE);
		cout << "Type in a four-character passcode: ";
		cin >> accountID;
		while (accountID < 1 || accountID > 9999)
		{
			cout << "Error! ID out of range.\n";
			cin >> id;
		}
		//accountID = id;
		//cin >> accountID;
		cin.ignore();
		cin.get();
		cout << "Congrats! Your new ID number is " << accountID
			<< ".\nKeep this number safe and don't share it with others.\n";
	}
};
class BankAccount : public BankManage
{
protected:
	int bankID;

public:
	BankAccount();
	//virtual double deposit();
	//virtual double withdraw();
	//virtual void print() = 0;
};

// Constructor for BankAccount
BankAccount::BankAccount()
{
	bankID = this->accountID;
}

//// Savings Account
//class savingAccount : public BankAccount
//{
//private:
//	double apyRate;
//	double balance;
//public:
//	savingAccount();
//	void interest();
//	double withdraw();
//	double deposit();
//	void print();
//};
//
//// Constructor for savingAccount
//savingAccount::savingAccount()
//{
//	apyRate = 0.0105;
//}
//
//// Interest for savingsAccount
//void savingAccount::interest()
//{
//
//}
//
//// Withdraw from savings account
//double savingAccount::withdraw()
//{
//
//}
//
//// Deposit in savings account
//double savingAccount::deposit()
//{
//
//}
//
//// Print the balance in the savings account
//void savingAccount::print()
//{
//	cout << balance << endl;
//}

//class checkingAccount
//{
//private:
//	double apyRate = 0.0105;
//public:
//	checkingAccount();
//	void interest();
//	double withdraw();
//	double deposit();
//	void print();
//};


// Function Prototypes
void writeAccount(vector<BankManage> &);
void manageAccounts(vector<BankManage> &);

int main()
{
	// Variables
	vector<BankManage> customers;

	// Let's start the program!!!
	cout << "-----------Samediff Bank-----------\n";

	// Menu System
	int choice;

	cout << "    Please select the following:\n\n";
	cout << "1. Create a new account.\n";
	cout << "2. Add or remove an account.\n";
	cout << "3. Deposit an amount into one of your accounts.\n";
	cout << "4. Withdraw an amount from one of your accounts.\n";
	cout << "5. View your balance from one of your accounts.\n";
	cout << "6. Check how much interest you will earn in one of your accounts.\n";
	cout << "7. Exit the program.\n";
	cout << "Enter your choice here: \n";
	cin >> choice;

	switch (choice)
	{
	case 1:
		writeAccount(customers);
		break;
	case 2:
		manageAccounts(customers);
		break;
	case 3:
	case 4:
	case 5:
	case 6:
	case 7:
	default:
		cout << "Error! Entered invalid input. Now closing program.\n";
		break;
	}
	
	cout << "\nThank you for using Samediff Bank!\nYour account will update once exiting.\n";
	cin.ignore();
	cin.get();
	return 0;
}

void writeAccount(vector<BankManage>& customers)
{
	// Variables
	BankManage customer;
	fstream outFile;
	char first[NAMESIZE], last[NAMESIZE];

	outFile.open("bankData.txt", ios::out );
	if (!outFile)
	{
		cout << "Error opening file!";
		cin.ignore();
		cin.get();
		exit(1);
	}
	else
	{
		customer.createNewAccount();
		outFile.write(reinterpret_cast<char *>(&customer), sizeof(outFile));
	}

	BankManage newCustomer(first[30], last[30], customer.getID(), customer.getBalance());
	customers.push_back(newCustomer);
	outFile.close();
}

void manageAccounts(vector<BankManage> &)
{

}

[salem c]

1. I have to load and save all the data to and from a binary file, but I was testing out how it would output without being a binary file and it appears unreadable. How could I fix this and successfully turn it into a binary file?

> outFile.open("bankData.txt", ios::out );
Calling something .txt doesn't make it a text file.

> outFile.write(reinterpret_cast<char *>(&customer), sizeof(outFile));
Using write() is what makes it a binary file.

Until you have everything working, I suggest you also do this as well

outFileDebug.open("bankDebugData.txt", ios::out );
outFileDebug << customer.fName << endl;
outFileDebug << customer.lName << endl;
outFileDebug << customer.accountID << endl;
outFileDebug << customer.balance << endl;