C++ Calculate the running average for residential and business customer spending

Question

C++

Calculate the running average for residential and business customer spending

Print all customer's bill to a single file and the end of the file you should have the average summary for each customer type.

My file is customers.txt for read, and calculations.txt for output file.

I need the running average code so that when I look in calculations.txt I see the averages of business and residential spending at the end.

Here is what I have so far:

#include <iostream>
#include <string>
#include <iomanip>
#include <fstream>
#include <cmath>

using namespace std;

//Named constants – residential customers
const double RES_BILL_PROC_FEES = 4.50;
const double RES_BASIC_SERV_COST = 20.50;
const double RES_COST_PREM_CHANNEL = 7.50;

//Named constants – business customers
const double BUS_BILL_PROC_FEES = 15.00;
const double BUS_BASIC_SERV_COST = 75.00;
const double BUS_BASIC_CONN_COST = 5.00;
const double BUS_COST_PREM_CHANNEL = 50.00;

int main()
{
   //Variable declaration
   int accountNumber;
   char customerType;
   int numOfPremChannels;
   int numOfBasicServConn;
   double resAmountDue = 0;
   double busAmountDue = 0;
  
   int count = 0;
   int customers;
   double sum = 0;
   int resCustomerTotal = 0;
   int busCustomerTotal = 0;

   ifstream inFile;
   inFile.open("customers.txt");

   ofstream outFile;
   outFile.open("calcuations.txt");

   cout << "Please enter the number of customers in the list: ";
   cin >> customers;
   cout << endl;

   //outFile << sum;

   for (count = 0; count < customers; count++)
   {

       ((inFile >> customerType));

       if (customerType == 'R' || customerType == 'r')

       {
           resCustomerTotal = resCustomerTotal + 1;

           ((inFile >> accountNumber >> numOfPremChannels));

           resAmountDue = (numOfPremChannels * RES_COST_PREM_CHANNEL)
               + RES_BASIC_SERV_COST
               + RES_BILL_PROC_FEES;

           outFile << " ";
           outFile << " " << customerType << " " << accountNumber << " ";
           outFile << numOfPremChannels << " $" << resAmountDue;

       }

       else if (customerType == 'B' || customerType == 'b')
       {
           ((inFile >> accountNumber >> numOfBasicServConn >> numOfPremChannels));

           busCustomerTotal = busCustomerTotal + 1;

           if (numOfBasicServConn <= 10)
           {
               busAmountDue = BUS_BILL_PROC_FEES
                   + BUS_BASIC_SERV_COST
                   + numOfPremChannels *
                   BUS_COST_PREM_CHANNEL;
           }
           else
           {
               busAmountDue = BUS_BILL_PROC_FEES
                   + BUS_BASIC_SERV_COST
                   + (numOfBasicServConn - 10) *
                   BUS_BASIC_CONN_COST
                   + numOfPremChannels *
                   BUS_COST_PREM_CHANNEL;

               outFile << " ";
               outFile << " " << customerType << " " << accountNumber << " "
                   << numOfBasicServConn << " " << numOfPremChannels << " $" << busAmountDue;
           }

       }

       else if (customerType != 'R' || customerType != 'r' || customerType != 'B' || customerType != 'b')
       {
           outFile << "Invalid customer type." << endl;
       }

   }

   count++;
   cout << " ";

}

Explanation / Answer

#include <bits/stdc++.h>
using namespace std;

//Named constants – residential customers
const double RES_BILL_PROC_FEES = 4.50;
const double RES_BASIC_SERV_COST = 20.50;
const double RES_COST_PREM_CHANNEL = 7.50;

//Named constants – business customers
const double BUS_BILL_PROC_FEES = 15.00;
const double BUS_BASIC_SERV_COST = 75.00;
const double BUS_BASIC_CONN_COST = 5.00;
const double BUS_COST_PREM_CHANNEL = 50.00;

int main(){
    //Variable declaration
   int accountNumber;
   char customerType;
   int numOfPremChannels;
   int numOfBasicServConn;
   double resAmountDue = 0;
   double busAmountDue = 0;

   int count = 0;
   int customers;
   double sum_1 = 0;
   double sum_2 = 0;
   int resCustomerTotal = 0;
   int busCustomerTotal = 0;

   ifstream inFile;
   inFile.open("customers.txt");

   ofstream outFile;
   outFile.open("calcuations.txt");

   cout << "Please enter the number of customers in the list: ";
   cin >> customers;
   cout << endl;

   for (count = 0; count < customers; count++){
       ((inFile >> customerType));
       if (customerType == 'R' || customerType == 'r'){
           resCustomerTotal = resCustomerTotal + 1;
           ((inFile >> accountNumber >> numOfPremChannels));
           resAmountDue = (numOfPremChannels * RES_COST_PREM_CHANNEL) + RES_BASIC_SERV_COST
           + RES_BILL_PROC_FEES;

           outFile << " ";
           outFile << " " << customerType << " " << accountNumber << " ";
           outFile << numOfPremChannels << " $" << resAmountDue;
           sum_1 += resAmountDue;
       }
       else if (customerType == 'B' || customerType == 'b'){
           ((inFile >> accountNumber >> numOfBasicServConn >> numOfPremChannels));
           busCustomerTotal = busCustomerTotal + 1;
           if (numOfBasicServConn <= 10){
               busAmountDue = BUS_BILL_PROC_FEES + BUS_BASIC_SERV_COST + (numOfPremChannels *
                   BUS_COST_PREM_CHANNEL);
           }
           else{
               busAmountDue = BUS_BILL_PROC_FEES + BUS_BASIC_SERV_COST
               + (numOfBasicServConn - 10) * BUS_BASIC_CONN_COST + (numOfPremChannels *
               BUS_COST_PREM_CHANNEL);
           }
           outFile << " ";
           outFile << " " << customerType << " " << accountNumber << " "
               << numOfBasicServConn << " " << numOfPremChannels << " $" << busAmountDue;              
           sum_2 += busAmountDue;
        }
       else if (customerType != 'R' || customerType != 'r' || customerType != 'B' || customerType != 'b'){
           outFile << "Invalid customer type." << endl;
       }
   }
   outFile << "Average of residential spending   " << sum_1/resCustomerTotal << endl;
   outFile << "Average of business spending   " << sum_2/busCustomerTotal << endl;
   count++;
   cout << " ";
}

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