#include <iostream>
#include <fstream>

#include <string>

using namespace std;

void OpenTheFile(ifstream & aFile);
float GetBalance(ifstream & aFile);
void GetATransaction(ifstream & aFile, float & amount, char & type);
void ProcessTransaction(char type, float amount, float & balance);

int main() {

   ifstream theFile;
   float totalBalance;
   char transType{'a'};
   float transAmount{0.00};

   OpenTheFile(theFile);

   totalBalance = GetBalance(theFile);
   GetATransaction(theFile, transAmount, transType);
   while( theFile) {
   //    procss the transaction
         cout << "Got a transaction of " << transType 
              << " " << transAmount << endl;
         ProcessTransaction(transType, transAmount,  totalBalance);
         GetATransaction(theFile, transAmount, transType);
   }
   theFile.close();
   cout << "The final balance is $" << totalBalance << endl;

   return 0;
}

void GetATransaction(ifstream & aFile, float & amount, char & type){
     int transactionNumber;
     string date;
     char junk;

     aFile >> transactionNumber;
     aFile >> date;
     aFile >> type;
     aFile >> junk;
     aFile >> amount;
}

float GetBalance(ifstream & aFile){
    char junk;
    float balance;

    // Get Balance
    //   read the $
    aFile >> junk;
    //   read the balance
    aFile >> balance;
    //   return the balance.
    return balance;
}

void OpenTheFile(ifstream & aFile){
   // do 
   //    get the file name
   //    open the file
   // while the file is not open

   aFile.open("finance.dep");
}

void ProcessTransaction(char type, float amount, float & balance){
     switch(type) {
         case 'D':
             balance += amount;
             break;
         case 'W':
             balance -= amount;
             break;
         default:
             cout << "Error in transaction type "<< type << endl;
     }
}