// program_id    APAccounts.cpp
// written_by    matt schwartz
// date_written  3/22/2009
// description   This program will get account transactions and return 
//               account balances and the sum of account balances.
//
// #include <fstream>
// #include<conio.h>
#include <iomanip>
#include <iostream>
#include <string>
 
using namespace std;
 
#define clearScreen() {for(int i=0; i<=25; ++i) {cout << endl; cout << flush;}}
 
// functions
char moreTrans();                                                                                            //    Asks if there are more transactions
void getAccountInfo();                                                                                        // function gets company name and account number, stores results global variable
double displayAccountSummary(double openBalance);                                                                        // does the math and returns the closing balance
double transaction();                                                                                        // function to get the transaction info into an array
double sumArray(const double list[], int listSize);                                                            // function that will sum an array
 
// global variables
int invoiceArraySize = 0;
int paymentArraySize = 0;
double beginBalance = 0; 
double invoice[20] = {0};                                                                                    // arrays for storing the info we need
double payment[20] = {0};                                                                                    // to process
double accountTotals[40] = {0};                                                                                
string companyName;                                                                                            // suppliers company name
string accountNum;                                                                                            // Little shops account number with this company
 
int main()
{ 
    char flag = 'Y';                                                                                        // loop control variable, exit when the user says
                                                                                                            // there are no more accounts to enter.
 
    int counter = 0;                                                                                        // array element counter, # of accounts processed
 
    double totalPayable = 0;
 
    while (flag != 'N')                                                                                        // enter loop
    {
        getAccountInfo();                                                                                     // calling a function, Asks for company name and account number and stores
 
        accountTotals[counter] = transaction();                                                                // calling a function, gets the details of account
                                                                                                            // transaction  returns the ending balance of thr current account ending balance of each account is an array element
        counter = counter++;
        displayAccountSummary(beginBalance);
        cout << "Would you like to enter more accounts?(Y/N)" << endl;
        cin >> flag;
    }    
 
    totalPayable = sumArray(accountTotals, counter);
    cout << fixed << showpoint;
    cout << setprecision(2);
//    cout<< "The sum of the open Accounts payable is $" << sumArray(accountTotals, counter) << endl;
//  cout<< "The sum of the open Accounts payable is $" << totalPayable << endl;
    return 0;
}
 
void getAccountInfo()                                                                                            // function gets company name and
{                                                                                                                // account info and stores them in
    cout << " Please enter the Company Name ";                                                                    // global variables.
    cout << endl;
    cin >> companyName;
    cout << " Please enter the account number ";
    cout << endl;
    cin >> accountNum;
}
 
 
double transaction()
{
    double transAmount = 0;
    char transactionType = 'I';
 
    clearScreen();
    cout << endl << endl << endl << endl  << endl << " Suppliers company name          " << companyName << endl;
    cout << "Please enter the account opening balance. ";
    cout << endl;
    cin >> beginBalance;
 
    while ( transactionType != '#')                                                    // enter loop
    {
    cout << "Please enter a transaction type ";
    cout << endl;
    cout << "I = invoice ";
    cout << endl;
    cout << "P = Payment ";
    cout << endl;
    cout << "# = no more transactions ";
    cout << endl;
    cout << "(I/P/#) ? ";
    cout << endl;
    cin >> transactionType;
        switch (transactionType)
        {                                                                            // enter switch
            case 'I':
            case 'i':
                invoice[invoiceArraySize] = transAmount;                                  // transaction is a debit, store the amount in the invoice array
                invoiceArraySize++;
                // transactionType = '#';
                break;
            case 'P':
            case 'p':
                payment[paymentArraySize] = transAmount;                                    // transaction is a credit, store the amount in the payment array
                paymentArraySize++;
                // transactionType = '#';
            break;
            case '#':
                if 
            break;
            default: 
            cout << "Invalid response, please try again. I, P, or # ";
            cout << endl;
            cin >> transactionType;
        }
                                                                                // exit switch
 
    }
                                                                                // exit loop
    return beginBalance;
}    
 
double sumArray(const double list[], int listSize)                                                                // function that will sum an array
{                                                                                                                // returns a sum
    int index;
    double sum = 0;
 
    for (index = 0; index < listSize; index++)
        sum =sum + list[index];
    return sum;
}
 
char moreTrans()                                                                                                // function will ask if there
{                                                                                                                // are more transactions to 
    char resp;                                                                                                    // procees and returns the    
                                                                                                                // response
    cout << "Would you like to enter more transactions?(Y/N)" << endl;
    cin >> resp;
    return resp;
}
 
double displayAccountSummary(double beginBalance)
{
     double closingBalance;
 
     cout << "The sum of the payments is $" << sumArray(payment, paymentArraySize);
     cout << endl;
     cout << "The sum of the invoices is $" << sumArray(invoice, invoiceArraySize);
     cout << endl;
     cout << "The opening Balance is $" << beginBalance;
     cout << "The closing Balance is $" << (beginBalance + sumArray(invoice, invoiceArraySize) - sumArray(payment, paymentArraySize));
     closingBalance = (beginBalance + sumArray(invoice, invoiceArraySize) - sumArray(payment, paymentArraySize));
     return closingBalance;
 
}