Question

This program is intended for C++

A special type of situation, called a controlled break, can occur when processing records of data must temporarily pause because a key value has changed. For example, a control break might occur in a report that contains subtotals for groupings of records.

This program requires such a procedure.  

Sales people at a local car dealership are paid by commission. For every car sale, a sales person earns 30% of the base price or $100, whichever is higher.  

Write a program that uses of a loop to read through and process records in a file. Whenever the program encounters a new employee id, it should pause processing long enough to display the total of the previous employee’s commissions before processing the record just read. After all records have been processed, the program should display a count of the records processed, the total sales, and the total commissions paid out. A sample output follows:

                                        WEEKLY SALES REPORT

Employee Retail Base Commission

101 24125.00 1201.00     360.30

101    7650.00 350.00     105.00

101    38460.00 1517.00     455.10

***Total Commission for 101: 920.40

                                102 10500.00 500.00        150.00

102 7500.00   250.00        100.00

102 17551.00 1120.00        336.00

102 12400.00 400.00        120.00

***Total Commission for 102: 706.00

103 41500.00   550.00        165.00

103 18670.00 1250.00        375.00

103 6700.00 250.00        100.00

103 17067.00 1018.00        305.40

***Total Commission for 103: 945.40

Records:   11

Total Sales: 202123.00

Total Commissions: 2571.80

A sample input file, carsales.dat, to generate the report is shown below. The first value in a line is the employee id. The second value is the retail sale amount of the car (without tax.) The third item is the base price on which the sales person’s commission is determined. Note: It is important that our data set is sorted by sales person id number. If the data set is not sorted, the control-break process won't work.

101	24125 1201
101	7650 350
101	38460 1517
102	10500 500
102	7500 250
102	17551 1120
102	12400   400
103	41500   550
103	18670 1250
103	6700 250
103	17067 1018

Tips:

• Make sure the input file exists prior to starting to process records. If the file does not exist, end the program.
• When we read the first record, we need to initialize a variable we will use to compare all following records against to see if the employee id has changed. Typically, we complete this step prior to starting the loop which processes all subsequent records.
• During normal processing, we accumulate a subtotal for the current sales person each time we loop. When the key field changes (and the control break occurs), we print the subtotal, reset the subtotal to 0, and reset the variable used to compare all following records to the new id number just read in.
• Once the last record is read in and the loop ends, we will need to perform one last subtotal line prior to printing summary totals.

Answer 1

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Code;

#include <iostream>
#include<iomanip>
#include <fstream>

using namespace std;

int main()
{
//input file handle
   ifstream inputFile;
  
   int employeeId, previousEmployeeId, recordCount=0;
   float sales, basePrice,commission, employeeCommission=0, totalSales=0, totalCommission=0;
  
   //open input file
   inputFile.open("carsales.dat");
  
//if fail to open the file then end the program
if(inputFile.fail())
{
std::cout << "File open error" << std::endl;
return -1;
}
  
//display the header
cout <<"\t\tWEEKLY SALES REPORT" <<endl;
cout <<"Employee Retail\t\tBase\tCommission" <<endl;
//read first line of data
inputFile >> employeeId >> sales >> basePrice;
previousEmployeeId = employeeId;
  

do
{
recordCount++; //increase record count
commission = basePrice * 0.3; //set commission to 30 % of base price
if(commission < 100) //if commission is less than 100 then set it to 100
commission = 100;
totalSales += sales; //add sales to totalSales
totalCommission += commission; //add commission to totalCommission
  
if(previousEmployeeId == employeeId)
{
//if same employee then add it to employeeCommission
employeeCommission += commission;
//display employee data
cout << employeeId << setprecision(2) << fixed << "\t" <<setw(8) << sales << "\t" << basePrice << "\t" << commission <<endl;
}
else
{
//if new eomployee then display the data of previous Employee and then for new Employee
cout <<"***Total Commission for " << previousEmployeeId << ": " << employeeCommission <<endl;
cout << employeeId << setprecision(2) << fixed << "\t" << setw(8) << sales << "\t" << basePrice << "\t" << commission <<endl;
//reset the commission and previousEmployeeId
employeeCommission=commission;
previousEmployeeId = employeeId;
}
  
}while(inputFile >> employeeId >> sales >> basePrice);
  
//last employee final data
cout <<"***Total Commission for " << previousEmployeeId << ": " << employeeCommission <<endl;
//overall count and sales
cout <<"Records: " << recordCount <<endl;
cout <<"Total Sales: " << totalSales <<endl;
cout << "Total Commissions: " << totalCommission <<endl;
  
return 0;
}

=========screen shot of the code for indentation=======

input file:

Output: