// update balance in record
void updateRecord( fstream &updateFile )
{
// obtain number of account to update
int accountNumber = getAccount( "Enter account to update" );
// move file-position pointer to correct record in file
updateFile.seekg( ( accountNumber - 1 ) * sizeof( ClientData ) );
// read first record from file
ClientData client;
updateFile.read( reinterpret_cast< char * >( &client ),
sizeof( ClientData ) );
// update record
if ( client.getAccountNumber() != 0 )
{
outputLine( cout, client ); // display the record
// request user to specify transaction
cout << "\nEnter charge (+) or payment (-): ";
double transaction; // charge or payment
cin >> transaction;
// update record balance
double oldBalance = client.getBalance();
client.setBalance( oldBalance + transaction );
outputLine( cout, client ); // display the record
// move file-position pointer to correct record in file
updateFile.seekp( ( accountNumber - 1 ) * sizeof( ClientData ) );
// write updated record over old record in file
updateFile.write( reinterpret_cast< const char * >( &client ),
sizeof( ClientData ) );
} // end if
// create account
void ClientData::createAccount ()
{
int accountNumber;
int pinCode;
string UserName;
double balance;
fstream outdatabase( "ATMData.txt", ios::in | ios::out | ios::binary );
// exit program if fstream cannot open file
if (!outdatabase)
{
cerr << "File could not be opened." << endl;
exit( 1 );
} // end if
cout << "Enter account number (1 to 10000, 0 to end input)\n? ";
// require user to specify account number
ClientData database;
cin >> accountNumber;
// user enters information, which i copied into file
while ( accountNumber > 0 && accountNumber <= 10000 )
{
// user enters pin code, user name, and balance
cout << "Enter Pin code, User name, balance\n? ";
cin >> pinCode;
cin >>UserName;
cin >> balance;
// set record accountNumber, pincode, UserName, balance values
database.setAccountNumber( accountNumber ) ;
database.setPinCode(pinCode);
database.setUserName( UserName );
//database.setFirstName( firstName ) ;
database.setBalance( balance );
// seek position in file of user-specified record
outdatabase.seekp( ( database.getAccountNumber() - 1 ) *
sizeof( ClientData ) ) ;
// enable user to enter another account
cout << "Enter account number\n? ";
cin >> accountNumber;
} // end while
} // end save data to file
int main()
{
int accountNumber;
string lastName;
string firstName;
double balance;
fstream outCredit( "credit.dat", ios::in | ios::out | ios::binary );
// exit program if fstream cannot open file
if ( !outCredit )
{
cerr << "File could not be opened." << endl;
exit( EXIT_FAILURE );
} // end if
cout << "Enter account number (1 to 100, 0 to end input)\n? ";
// require user to specify account number
ClientData client;
cin >> accountNumber;
// user enters information, which is copied into file
while ( accountNumber > 0 && accountNumber <= 100 )
{
// user enters last name, first name and balance
cout << "Enter lastname, firstname, balance\n? ";
cin >> lastName;
cin >> firstName;
cin >> balance;
// set record accountNumber, lastName, firstName and balance values
client.setAccountNumber( accountNumber );
client.setLastName( lastName );
client.setFirstName( firstName );
client.setBalance( balance );
// seek position in file of user-specified record
outCredit.seekp( ( client.getAccountNumber() - 1 ) *
sizeof( ClientData ) );
// write user-specified information in file
outCredit.write( reinterpret_cast< const char * >( &client ),
sizeof( ClientData ) );
// enable user to enter another account
cout << "Enter account number\n? ";
cin >> accountNumber;
} // end while
} // end main
