Having trouble with a function in an assignment. The function should read transaction data from a txt file until the end of the file is reached. A typical transaction is shown below. The first field on the transaction record is the date of the transaction, followed by an account number, then the transaction type ('C' for charge or 'P' for payment), and finally a transaction amount.
06/19 1111-1111-1111-1111 C 430.00
Once all of the data for a given transaction has been read, search the accounts array for the account number given in the transaction. If the account number is present in the array, then the transaction may be processed. For a payment, simply call the process_payment() method for the object that contains a matching account number, passing it the transaction amount. For a charge, call the process_charge() method for the object that contains a matching account number, passing it the transaction amount.
For each transaction record, print a line in a transaction report with the data from the record and the updated balance for that account. If the balance is negative, it should be printed as a positive number but followed by the letters "CR". If the transaction account number was not found in the account array or if a charge exceeded the account's credit limit (i.e., if the process_charge() method returned false), print an appropriate error message instead of the account balance.
After all transactions have been processed, close the transaction file.
I have the rest of the program written, I'm just stuck on (what I believe to be) the logic of this part and how to read from the file and then compare it to the Class array I built earlier. My code is below and the function I'm having issues with is process_transactions (at the very bottom) Thanks in advance:
Code:/******************************************************************************* PROGRAM: Program 2 - Classes AUTHOR: Brandon Rogers FUNCTION: This program will implement a small database of credit card accounts. A file of charge and payment transactions will be applied to the accounts. INPUT: 1) accounts A binary file used to build the array of CreditAccounts. /home/turing/abyrnes/input/cs241/fall10/accounts 2) trans A regular text file that contains the different transactions that will be applied to the array of CreditAccounts. /home/turing/abyrnes/input/cs241/fall10/trans OUTPUT: Reports containing an initial Credit Account Listing, a Transaction Report and an updated Credit Account Listing. *******************************************************************************/ #include <iostream> #include <iomanip> #include <fstream> #define SIZE 20 #define ACCOUNTS /home/turing/abyrnes/input/cs241/fall10/accounts #define TRANS /home/turing/abyrnes/input/cs241/fall10/trans using namespace std; class CreditAccount { public: CreditAccount(); // Constructor char* get_accountNumber(); float get_balance(); void process_payment( float ); bool process_charge( float ); void print(); private: char acctNum[20]; char custName[21]; int expMonth; int expYear; float creditLimit; float currentBal; }; /**************************************************************** FUNCTION: CreditAccount - constructor ARGUMENTS: none RETURNS: nothing NOTES: Initializes the string data members of the class to null and all of the numeric data members to 0 ****************************************************************/ CreditAccount::CreditAccount() { acctNum[0] = '\0'; custName[0] = '\0'; expMonth = 0; expYear = 0; creditLimit = 0; currentBal = 0; } /**************************************************************** FUNCTION: get_accountNumber ARGUMENTS: none RETURNS: a pointer to the first character of the account number ****************************************************************/ char* CreditAccount::get_accountNumber() { return & acctNum[0]; } /**************************************************************** FUNCTION: get_balance ARGUMENTS: none RETURNS: the balance ****************************************************************/ float CreditAccount::get_balance() { return currentBal; } /**************************************************************** FUNCTION: process_payment ARGUMENTS: a float payment amount RETURNS: nothing NOTES: subtracts the payment amount from the balance ****************************************************************/ void CreditAccount::process_payment(float paymentAmt) { currentBal -= paymentAmt; } /**************************************************************** FUNCTION: process_charge ARGUMENTS: a float charge amount RETURNS: a boolean value NOTES: If the charge amount plus the current balance is greater than the credit limit, the method returns false without changing the balance. Otherwise, the charge amount is added to the balance and the method returns true. ****************************************************************/ bool CreditAccount::process_charge( float chargeAmt ) { if( chargeAmt + currentBal > creditLimit ) return false; else currentBal += chargeAmt; return true; } /**************************************************************** FUNCTION: print ARGUMENTS: none RETURNS: nothing NOTES: prints the data members of the object on one line. if the balance is negative, it will print as a positive number followed by "CR" (for credit). ****************************************************************/ void CreditAccount::print() { cout << left << showpoint << fixed << setprecision(2) << setw(22) << acctNum << setw(20) << custName; if( expMonth < 10 ) { cout << "0" << expMonth; } else { cout << expMonth; } cout << "/"<< setw(7) << expYear; cout << right << setw(10) << creditLimit << setw(14) << currentBal << endl; } // Function Prototypes: int read_accounts( CreditAccount[] ); void print_accounts( CreditAccount[], int ); void process_transactions( CreditAccount[], int ); int main() { CreditAccount creditArr[SIZE]; int validAccts = 0; validAccts = read_accounts( creditArr ); print_accounts( creditArr, validAccts ); process_transactions( creditArr, validAccts ); print_accounts( creditArr, validAccts ); cout << endl; system( "pause" ); return 0; } /**************************************************************** FUNCTION: read_accounts ARGUMENTS: An array of CreditAccount objects. RETURNS: The number of accounts read into the array. NOTES: This function reads data for the credit card accounts from a file into the account array. ****************************************************************/ int read_accounts( CreditAccount Arr[] ) { CreditAccount temp; ifstream inFile; int i = 0; // # of accounts read inFile.open( "ACCOUNTS", ios::binary ); if( inFile.fail() ) { cout << "file failed to open"; exit( -1 ); } inFile.read( (char * ) &temp, sizeof( temp ) ); while( inFile ) { Arr[i] = temp; i++; inFile.read( (char * ) &temp, sizeof( temp ) ); } inFile.close(); return i; } /**************************************************************** FUNCTION: print_accounts ARGUMENTS: 1) Array of CreditAccount objects 2) Number of valid accounts stored in the array (int) RETURNS: nothing NOTES: This function prints a report header and column headers and then loops through the valid accounts in the account array and calls each object's print() method ****************************************************************/ void print_accounts( CreditAccount Arr[], int validAccts ) { int i; cout << endl << " " << setw(48) << "Credit Account Listing" << endl << endl << setw(61) << "Credit" << setw(15) << "Account" << endl << "Account Number" << setw(12) << "Name" << setw(24) << "Exp. Date" << setw(10) << "Limit" << setw(16) << "Balance" << endl << "----------------------------------------------------------------------------" << endl << endl; for( i = 0; i < validAccts; i++ ) { Arr[i].print(); } } /**************************************************************** FUNCTION: process_transactions ARGUMENTS: 1) Array of CreditAccount objects 2) Number of valid accounts stored in the array (int) RETURNS: nothing NOTES: This function opens the file trans for input. Before reading any transactions, the function prints a report header and column headers. It then reads transaction data from the file until the end of the file is reached. ****************************************************************/ void process_transactions( CreditAccount Arr[], int validAccts ) { char temp; char transAr[100]; ifstream inFile; int i = 0; inFile.open( "TRANS" ); if( inFile.fail() ) { cout << "file failed to open"; exit( -1 ); } cout << endl << " " << setw(48) << "Transaction Report" << endl << endl << "Date" << setw(10) << "Account" << setw(10) << "Type" << setw(10) << "Amount" << setw(15) << "New Balance" << endl << endl; inFile.read( (char * ) &temp, sizeof( temp ) ); while( inFile ) { transAr[i] = temp; i++; inFile.read( (char * ) &temp, sizeof( temp ) ); } inFile.close(); }
