Please HELP with Credit Card Simulator coding using C++

My coding is below the instructions,

Below is what I would like the calculator to do:

The program should be constructed using classes. Account operations include opening the account with an established limit, posting charges and payments, requesting a limit increase, and displaying account history. Data is stored in text files by account number so that you may run the program multiple times with the same account.

A sample/session might be (items in bold are user inputs):

Welcome to the Credit Card simulator!

Existing account or new (E/N): N

Your account number will be: 999999999

Your Credit Limit: $1000.00

Account: 99999999

Outstanding Balance: 0.00

Credit Limit: 1000

Available Credit: 1000

Transaction Options:

Quit

New Charge

Payment

Credit Increase Request

Card History

Choice: 1

Charge Amount: 100.00

Charge Description: Gas

Account: 99999999

Outstanding Balance: 100.00

Credit Limit: 1000.00

Available Credit: 900.00

Transaction Options:

Quit

New Charge

Payment

Credit Increase Request

Card History

Choice: 2

Payment Amount: 25

Account: 99999999

Outstanding Balance: 75.00

Credit Limit: 1000

Available Credit: 925.00

Transaction Options:

Quit

New Charge

Payment

Credit Increase Request

Card History

Choice: 3

Requested Increase: 250

Sorry, but your credit increase cannot be granted at this time.

Account: 99999999

Outstanding Balance: 75.00

Credit Limit: 1000

Available Credit: 925.00

Transaction Options:

Quit

New Charge

Payment

Credit Increase Request

Card History

Choice: 4

Transaction Log History:

Account 99999999 created, 8/1/2008 10:00:00am

Charge: 100, Gas, 8/1/2008 10:05:00am

Payment: 25, 8/5/2008 4:00:00pm

Limit Increase: 250, declined, 8/6/2008 8:00:00

Account: 99999999

Outstanding Balance: 75.47

Credit Limit: 1000

Available Credit: 924.53

Transaction Options:

Quit

New Charge

Payment

Credit Increase Request

Card History

Choice: 0

Thanks for using the credit card simulator!

The CREDIT CARD class should handle the normal activities related to a credit card: a) creating the account, b) making charges and payments, and c) updating the credit balance and credit limits. In addition, the Credit Card class will keep account status and transaction histories in text files.

Develop the Credit Card class according to the following guidelines:

The class should either create a new account or load an old account if a valid account number is given. This would involve 2 constructors: one that takes no account number (and generates a new account) or one that accepts an account number and reads in the current values for the account. In the case of a new account, the Credit Card number should be a randomly generated value while the starting credit limit will be $1000. In the case of an existing account, you must verify that the account actually exists (i.e., there is already a non-empty account status file). The account status (only) data should be stored in a text file named as follows: CC + Account Number + .txt.

Methods for processing transactions must be included. These increase and decrease the credit card balance along with the remaining credit. Make sure that the operator cannot exceed his/her credit limit with any given charge amount. Each transaction should be stored in a credit card log file, with name as follows: CCL + account number + .txt

Allow for a request for a credit increase; increases are granted in $100 increments. Use a random number generator to determine whether a credit increase request is granted or denied.

The display of the transaction log is to be done in the view program (the program with main()) there should not be any screen output done by the Credit Card Class. Each transaction log entry is time-stamped when posted to the file (as seen from the sample run).

A list of likely class properties for the Credit Card Class:

- 2 Constructors (with and without Account number);

- account number (returns current account number);

- credit limit (returns current limit);

- credit increase (returns code indicating success/failure of increase request);

- available credit (return value);

- balance (return value);

- transaction (processes transactions and returns error status codes);

- history log (returns an appropriate structure containing account history)

Other class members may be created as you see fit.

This is what I have so far by using VS C++:

CreditCard.h

#pragma once

#include

using namespace std;

class CreditCard

{

public:

CreditCard(void);

CreditCard(int a);

double getCreditLimit();

double getBalanceDue();

int getAcctNo();

~CreditCard(void);

private:

int Ano;

bool vErr;

string vEMsg;

double vCLimit, vBalDue;

void writestatus();

void writelog(string m);

string CCName, CCLName;

};

CreditCard.cpp

#include "stdafx.h"

#include "CreditCard.h"

#include

#include

#include

#include

using namespace std;

CreditCard::CreditCard(void)

{

string fName;

ifstream fin;

ostringstream n;

srand((unsigned)time(0));

Ano = (rand() % 100000) + 1;

n << Ano << flush;

fName = "CC" + n.str() + ".txt";

fin.open(fName.c_str());

while (fin.is_open())

{

fin.close();

Ano = (rand() % 100000) + 1;

n << Ano << flush;

fName = "CC" + n.str() + ".txt";

fin.open(fName.c_str());

}

fin.close();

vCLimit = 1000;

vBalDue = 0;

CCName = fName;

CCLName = "CCL" + n.str() + ".txt";

writestatus();

writelog("Account " + n.str() + " opened.");

}

CreditCard::CreditCard(int a)

{

string fName;

ifstream fin;

ostringstream n;

vErr = false;

n << a << flush;

fName = "CC" + n.str() + ".txt";

fin.open(fName.c_str());

if (fin.is_open())

{

Ano = a;

fin >> vCLimit;

fin >> vBalDue;

fin.close();

CCName = fName;

CCLName = "CCL" + n.str() + ".txt";

writelog("Account " + n.str() + " reopened.");

}

else

{

Ano = 0;

vCLimit = 0;

vBalDue = 0;

vErr = true;

vEMsg = "Account " + n.str() + " could not be opened.";

}

}

int CreditCard::getAcctNo()

{

return Ano;

}

double CreditCard::getCreditLimit()

{

return vCLimit;

}

double CreditCard::getBalanceDue()

{

return vBalDue;

}

void CreditCard::writestatus()

{

vErr = false;

vEMsg = "";

ofstream fout;

fout.open(CCName.c_str());

if (fout.is_open())

{

fout << vCLimit << endl;

fout << vBalDue << endl;

fout.close();

}

else

{

vErr = true;

vEMsg = "Unable to write status file.";

}

}

void CreditCard::writelog(string m)

{

vErr = false;

vEMsg = "";

time_t rawtime;

time(&rawtime);

ofstream fout;

fout.open(CCLName.c_str(), ios_base::app);

if (fout.is_open())

{

fout << m << " on " << ctime(&rawtime) << endl;

fout.close();

}

else

{

vErr = true;

vEMsg = "Unable to write log entry: " + m;

}

}

CreditCard::~CreditCard()

{

}

CreditCardSim.cpp

// CreditCardSim.cpp : main project file.

#include "stdafx.h"

#include "CreditCard.h"

#include

using namespace std;

using namespace System;

int main()

{

CreditCard *cc;

char choice;

int acctno;

cout << "New or Existing Account? (N/E): ";

cin >> choice;

if (choice == 'N')

{

//new account creation

cc = new CreditCard();

cout << "Credit account " << cc->getAcctNo() << " opened." << endl;

}

else

{

cout << "Enter account number: ";

cin.ignore(1000, ' ');

cin >> acctno;

cc = new CreditCard(acctno);

cout << "Credit account " << cc->getAcctNo() << " was re-opened." << endl;

cout << "Limit = " << cc->getCreditLimit() << endl;

cout << "Balance Due = " << cc->getBalanceDue() << endl;

}

system("Pause");

return 0;

}