Question

In C++, Please help me compute the following flowchart exactly like this requirement:

• Use while loops for the input validations required:

• number of employees(cannot be less than 1) and
• number of days any employee missed(cannot be a negative number, 0 is valid.)

• Each function needs a separate flowchart.
  • The function charts are not connected to main with flowlines.
  • main will have the usual start and end symbols.
  • The other three functions should indicate the parameters, if any, in start; and what is returned, if any value in the return oval symbol.
  • The call statements (in main) should use striped rectangles containing the name of the function called.
• Study the sample outputs carefully. Your output should have the same “look”.
• Do not use global variables.
  • Define, open, and close your file in main.
  • The file is passed as a reference variable of type ofstream to the one function that uses it.
  • You should not use any other reference variables in your code.
• Use prototypes and code function definitions after the main function.
• Use information from Chapters 1 – 6 in your text. (No arrays)
• Follow the Processing Requirements exactly when you design your logic.

Concepts tested in this project

• Learn to organize code within a function
• Learn to pass data to and return data from a function
• Use of loops
• Use of output file processing

Project Description

Write a program that calculates the average number of days a company's employees are absent during the year and outputs a report on a file named "employeeAbsences.txt".

Project Specifications

Input for this project:

• the user must enter the number of employees in the company.
• the user must enter as integers for each employee:
  • the employee number (ID)
  • the number of days that employee missed during the past year.

Input Validation:

• Do not accept a number less than 1 for the number of employees.
• Do not accept a negative number for the days any employee missed.
• Be sure to print appropriate error messages for these items if the input is invalid.

Output: The program should display the following data:

• display a student’s full name as programmer on both the console output and the file output
• display a due date
• Each employee number (ID) and the number of days missed should be written to the report file named "employeeAbsences.txt".
• The average number of days a company's employees are absenting during the year should be written to the report file named "employeeAbsences.txt".

Processing Requirements

• Create a variable of type ofstream inside main for the output file. Use this variable to open the file employeeAbsences.txt in your main program to write data to it.
• Create the following three functions that will be called by the main function:

1. A function called numOfEmployees. This function asks the user for the number of employees in the company. This value should be returned as an int. The function accepts no arguments (No parameter/input).
2. A second function called totDaysAbsent that accepts arguments of type int for the number of employees in the company and a reference argument of type ofstream, and returns the total of missed days as an int. This function should do the following:
   1. Asks the user to enter the following information for each employee:

• The employee number (ID) (Assume the employee number is 4 digits or fewer, but don't validate it).
• The number of days that employee missed during the past year.
  2. Writes each employee number (ID) and the number of days missed to the output file (employeeAbsences.txt). ( Refer to Sample File Output )

3. A third function called averageAbsent that calculates the average number of days absent.
   1. The function takes two arguments:

• the number of employees in the company
• the total number of days absent for all employees during the year.
  2. This function should return, as a double, the average number of days absent.
  3. This function does not perform screen or file output and does not ask the user for input.

Answer 1

Summary :

Following are provided :

1) Code , (2) FLowchart for main and (3) output of program along with the file .

Note : implemented error handling for all fields .

##################### Code ###################

#include <fstream>
#include <iostream>
#include <string>
#include <stdio.h>
#include <stdlib.h>
#include <iomanip>

using namespace std;

int numOfEmployees();
double averageAbsent(int, int);
int totDaysAbsent(int, std::ofstream&);

int main()
{
   std::ofstream outfile;
   outfile.open("employeesAbsences.txt");
   outfile << " Student : " << " XYZ \n";
   outfile << std::setw(12) << "EmployeeID " << std::setw(14) << " No of Leaves \n";
   int tEmployees = numOfEmployees();
   int tLeaves = totDaysAbsent(tEmployees, outfile);
   double avgleaves = averageAbsent(tEmployees, tLeaves);
   outfile << "Average Leaves : " << avgleaves << "\n";
   outfile.close();

}

int numOfEmployees() {
   int num_employees = -1;
   bool flag = true;
   std::string istr;
   char a;
  
   while (flag) {
       std::cout << "Enter number of employees : ";
       try {
           std::cin >> istr;
           num_employees = std::stoi(istr);
           if (num_employees > 0)
               flag = false;
           else
               std::cout << "Invalid input , try again ...\n";
       }
       catch (std::invalid_argument const& e) {
           std::cout << "Invalid Input, try again ... \n";
       }
   }
   return num_employees;
}

int totDaysAbsent(int num, std::ofstream &outf) {
   bool flag = false;
   int total_leaves = 0;
   std::string idstr;
   std::string lstr;
   int id;
   int leaves;

   for (int i = 0; i < num; i++) {
      
       flag = true;
       idstr.clear();
       lstr.clear();
       while (flag) {
           std::cout << "Enter Employee ID : ";
           try {
               std::cin >> idstr;
               id = stoi(idstr);
               if (id > 0)
                   flag = false;
               else
                   std::cout << "Invalid input , try again ...\n";
           }
           catch (std::invalid_argument const& e) {
               std::cout << "Invalid Input, try again ... \n";
           }
       }

       flag = true;
      
       while (flag) {
           std::cout << "Enter Total Number of Leaves in the Year for Employee - " << id << " : ";
           try {
               std::cin >> lstr;
               leaves = stoi(lstr);
               if (leaves > 0)
                   flag = false;
               else
                   std::cout << "Invalid input , try again ...\n";
           }
           catch (std::invalid_argument const& e) {
               std::cout << "Invalid Input, try again ... \n";
           }
       }
       total_leaves = total_leaves + leaves;
       outf << std::setw(8)<< id << " , " << std::setw(10) << leaves << "\n";
   }

   return total_leaves;
}

double averageAbsent(int totalEmployees, int totalLeaves) {

   return (double)totalLeaves / totalEmployees;
}

###################### End Code ################

FLow chart :

Start lopen employeesAbsences.txt file write Student info Get Number of Employees totDaysAbsent numEmployees outfile) agerageAbsent totalEmployees totalLeaves): End

Output :

usr@DESKTOP-VUM526N: /mnt/i/ PRJ/ Code/cpp/misc/EmployeeLeaves$ g++ Employee Leaves.cpp usr@DESKTOP-VUM526N:/mnt/i/PRJ/Code/ cpp/misc/Employee Leaves $ ./a.out Enter number of employees : 3 Enter Employee ID : 3382 Enter Total Number of Leaves in the Year for Employee - 3382 : 3 Enter Employee ID : 2344 Enter Total Number of Leaves in the Year for Employee - 2344 : 8 Enter Employee ID : 8382 Enter Total Number of Leaves in the Year for Employee - 8382 : 4 usr@DESKTOP-VUM526N: /mnt/i/ PRJ/Code/cpp/misc/EmployeeLeaves $ cat employeesAbsences.txt Student : XYZ EmployeeID No of Leaves 3382, 2344, 8382 Average Leaves : 5 usr@DESKTOP-VUM526N: /mnt/i/ PRJ/ Code/ cpp/misc/Employee Leaves W 00