Question

C++

Objective: Write a program to read a pre-specified file containing salespersons' names and daily sales for some number of weeks. It will create an output file with a file name you have gotten from the user that will hold a summary of sales data. Specifications:

1. You should do a functional decomposition to identify the functions that you will use in the program. These should include reading and writing the files, tallying and showing statistics, etc.

2. The program should require no interaction with the user. Write output to a file named Summary.txt.

3. Sales Records are in a text file named SalesData.txt. You MUST use this exact file name and format for the input. The first entry will be an integer that tells how many sales people there are. Next will be an integer indicating the number of weeks of data for each salesperson. For each salesperson, there will be the sales person's first name and last name, followed by the data for that salesperson. Each week will have FIVE days of sales data as doubles. So, a file for 3 sales people and 2 weeks might look like this:

3

2

firstName1 lastName1

20.00 25.00 30.90 40.00 55.50

20.00 25.00 30.90 40.00 55.50

firstName2 lastname2

30.00 24.00 45.00 67.00 65.50 20.00

25.00 30.90 40.00 55.50

firstName3 lastName3

62.00 34.50 12.50 34.00 34.90

70.00 80.00 90.00 65.00 39.00

4. The program must be able to handle however many salespeople are specified up to 10, and however many weeks of data are specified (1 to 10 weeks). The data must be organized exactly as specified above. Be sure to read the file that way. I will test your program with a file having that format.

5. The output will go to an output file named Summary.txt. You will invent the format for the output file. The file must contain the following, all of which must be properly labeled so that it is easy to know what the numbers refer to:

o The number of sales people who were processed

o The number of weeks of sales that were processed

o The last name only of each sales person followed by total and average sales for each week

o Grand total sales and average sales per salespersons over all weeks

6. If the input file or output file opening fails, print an error message and exit.

Answer 1

#include <iostream>

#include <fstream>

#include <cstdlib>

#include <iomanip>

using namespace std;

typedef struct

{

string firstname;

string lastname;

int noWeeks;

double salesdata[10][5] ; //max 10 weeks with each having 5 days

}salesman;

//loads sales man data from specified file and retures the number of salesmen loaded

int loadfile(string filename, salesman salesmen[]);

void process(salesman salesmen[], int count);

int main()

{

string infilename = "/Users/raji/Documents/Chegg/c++/Test/Test/theSales.txt";

ifstream infile;

int count;

salesman salesmen[10]; //max 10 salesmen

count = loadfile(infilename, salesmen);

process(salesmen, count);

}

int loadfile(string filename, salesman salesmen[])

{

fstream infile;

int count;

infile.open(filename.c_str());

if(!infile.is_open())

{

cout << "ERROR: could not open file " << filename << endl;

exit(1);

}

infile >> count; // read the number of salesmen

for(int idx = 0; idx < count; idx++)

{

infile >> salesmen[idx].lastname >> salesmen[idx].firstname >> salesmen[idx].noWeeks;

for(int week = 0; week < salesmen[idx].noWeeks; week++) // for each week

{

for(int day = 0; day < 5; day++) // for each day in the week

infile >> salesmen[idx].salesdata[week][day];

}

}

infile.close();

return count;

}

void process(salesman salesmen[], int count)

{

double smTotal, smAvg ; //for an individual salesman

int totalWeeks = 0;

double grandTotalSales = 0, grandAvgSales = 0; //for overall (all the weeks of all salesmen

string filename;

ofstream outfile;

cout << "Enter output filename: " ;

cin >> filename;

outfile.open(filename.c_str());

if(!outfile.is_open())

{

cout << "Could not open output file " << filename << endl;

exit(1);

}

outfile << "Number of Salemen: " << count << endl;

outfile << fixed << setprecision(2);

for(int i = 0; i < count; i++)

{

outfile << salesmen[i].lastname << endl;

for(int week = 0; week < salesmen[i].noWeeks; week++)

{

//calculate weekly total and avg for the current saleman

smTotal = 0;

for(int day = 0; day < 5; day++)

{

smTotal += salesmen[i].salesdata[week][day];

}

grandTotalSales += smTotal;

smAvg = smTotal / 5;

outfile << smTotal << " " << smAvg << endl;

}

totalWeeks += salesmen[i].noWeeks;

}

grandAvgSales = grandTotalSales / totalWeeks;

outfile << "The total number of weeks altogether: " << totalWeeks << endl;

outfile << "The grand total sales: " << grandTotalSales << endl;

outfile << "Averge sales per week: " << grandAvgSales << endl;

outfile.close();

cout << "Finished processing. Check output file " << filename << endl;

}

input file : theSales.txt

3
lastName1 firstName1
2
20.00 25.00 30.90 40.00 55.50
20.00 25.00 30.90 40.00 55.50
lastname2 firstName2
3
30.00 24.00 45.00 67.00 65.50
20.00 25.00 30.90 40.00 55.50
56.90 87.00 43.50 56.98 55.40
lastName3 firstName3
2
62.00 34.50 12.50 34.00 34.90
70.00 80.00 90.00 65.00 39.00

output

$./a.out

Enter output filename: salesout.txt
Finished processing. Check output file salesout.txt

$ cat salesout.txt
Number of Salemen: 3
lastName1
171.40 34.28
171.40 34.28
lastname2
231.50 46.30
171.40 34.28
299.78 59.96
lastName3
177.90 35.58
344.00 68.80
The total number of weeks altogether: 7
The grand total sales: 1567.38
Averge sales per week: 223.91