Question

C++ Programming Programming

Project Outcomes:

 Understand and use C++ functions for procedural abstraction and Functional Decomposition

 Develop some functions for generating numerical data from numerical inputs

 Understand and utilize file input and file output to perform computing tasks

Requirements:

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 prompt the user for the output file name only. Obviously, this should be taken care of in a function.

3. Sales Records are in a text file named TheSales.txt. You MUST use this file name for the input.

a. The first entry will be an integer that tells how many sales people there are.

b. Following that will be an integer that tells you how many weeks of data are in the file.

c. Following that integer will be a sales person's first name, middle initial, and last name,

d. Followed by the daily sales for that employee for the proper number of weeks.

e. 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 A lastName1

20.00 25.00 30.90 40.00 55.50 20.00 25.00 30.90 40.00 55.50

firstname2 B lastName2

30.00 24.00 45.00 67.00 65.50 56.90 87.00 43.50 56.98 55.40

firstName3 C 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 (1 to 10 salespeople) 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. 5. The output will go to an output file name that you get from the user, with a format that you must invent. 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

a. The number of sales people that were processed.

b. The number of weeks of sales that were processed.

c. The last name only of each salesperson followed by total and average sales for each week.

d. Grand total sales and average sales per week for all salespersons over all weeks.

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

Implementation Notes: You will need to declare several variables. Try to use the least number of variables possible. You may assume that all weeks will have 5 days of sales reported. You can assume the correct number of names and middle initials will be there and the correct number of sales figures.

Answer 1

// C++ program to calculate the total and average sales

#include <iostream>

#include <iomanip>

#include <fstream>

#include <string>

using namespace std;

#define MAX_SALESPERSON 10

#define MAX_WEEK 10

#define NUM_DAYS_IN_WEEK 5

// function declaration

void readFile(ifstream &fin, string name[][3],double data[][MAX_WEEK][NUM_DAYS_IN_WEEK], int &num_salesperson, int &num_week);

void writeFile(string name[][3],double data[][MAX_WEEK][NUM_DAYS_IN_WEEK],int num_salesperson, int num_week);

void calTotalSales(double data[][MAX_WEEK][NUM_DAYS_IN_WEEK], double total_sales[][MAX_WEEK], int num_salesperson, int num_week);

int main() {

               ifstream fin("TheSales.txt"); // open input file, provide full path to file

               int num_salesperson = 0, num_week=0;

               string name[MAX_SALESPERSON][3];

               double data[MAX_SALESPERSON][MAX_WEEK][NUM_DAYS_IN_WEEK];

               // if file can be opened

               if(fin.is_open())

               {

                              readFile(fin,name,data,num_salesperson,num_week); // read data from file to array

                              writeFile(name,data,num_salesperson,num_week); // write data from array to output file

                              fin.close(); //close the file

               }else

                              cout<<"Unable to open TheSales.txt"<<endl;

               return 0;

}

// function to read data from input file to arrays

void readFile(ifstream &fin, string name[][3],double data[][MAX_WEEK][NUM_DAYS_IN_WEEK], int &num_salesperson, int &num_week)

{

               fin>>num_salesperson>>num_week;

               int salesperson=0,week=0,day=0;

               while(!fin.eof()) // read till the end of file

               {

                              fin>>name[salesperson][0]>>name[salesperson][1]>>name[salesperson][2];

                              week = 0;

                              while(week < num_week)

                              {

                                             day = 0;

                                             while(day < NUM_DAYS_IN_WEEK)

                                             {

                                                            fin>>data[salesperson][week][day];

                                                            day++;

                                             }

                                             week++;

                              }

                              salesperson++;

               }

}

// function to calculate the total sales for each salesperson for each week

void calTotalSales(double data[][MAX_WEEK][NUM_DAYS_IN_WEEK], double total_sales[][MAX_WEEK], int num_salesperson, int num_week)

{

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

               {

                              for(int j=0;j<num_week;j++)

                              {

                                             total_sales[i][j] = 0;

                                             for(int k=0;k<NUM_DAYS_IN_WEEK;k++)

                                             {

                                                            total_sales[i][j] += data[i][j][k];

                                             }

                              }

               }

}

// function to write the data for total and average sales to output file

void writeFile(string name[][3],double data[][MAX_WEEK][NUM_DAYS_IN_WEEK],int num_salesperson, int num_week)

{

               string filename;

               cout<<"Enter the name of the output file : ";

               cin>>filename;

               ofstream fout(filename.c_str());

               if(fout.is_open())

               {

                              double total_sales[num_salesperson][MAX_WEEK];

                              fout<<"Number of sales people processed : "<<num_salesperson<<endl;

                              fout<<"Number of weeks of sales processed : "<<num_week<<endl;

                              calTotalSales(data,total_sales,num_salesperson, num_week);

                              fout<<left<<setw(30)<<"Lastname"<<left<<setw(10)<<"Week"<<left<<setw(15)<<"Total Sales"<<left<<setw(15)<<"Average Sales"<<endl<<string(100,'-')<<endl;

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

                              {

                                             for(int j=0;j<num_week;j++)

                                             {

                                                            fout<<left<<setw(30)<<name[i][2]<<left<<setw(10)<<(j+1)<<left<<setw(15)<<fixed<<setprecision(2)<<total_sales[i][j]<<left<<left<<setw(15)

                                                                                          <<(total_sales[i][j])/NUM_DAYS_IN_WEEK<<endl;

                                             }

                              }

                              fout<<endl<<left<<setw(10)<<"Week"<<left<<setw(15)<<"Total Sales"<<left<<setw(15)<<"Average Sales"<<endl<<string(50,'-')<<endl;

                              double grand_total = 0;

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

                              {

                                             grand_total = 0;

                                             for(int j=0;j<num_salesperson;j++)

                                                            grand_total += total_sales[j][i];

                                             fout<<left<<setw(10)<<(i+1)<<left<<setw(15)<<fixed<<setprecision(2)<<grand_total<<left<<setw(15)<<(grand_total/num_salesperson)<<endl;

                              }

                              fout.close();

               }else

                              cout<<"Unable to open output file : "<<filename<<endl;

}

//end of program

Output:

Input file:

Console:

Output File: