//Kyu Bae
//PayRollData-main.cpp
//5-12-00
//C++ Project
//Purpose:
//This project deals with the establishment and manipulaation of an array 
//of representing payroll data for an organization. Each object is to contain the following 
// data about one employee in this organization:
//1) Employee ID #.
//2) Pointer to employee name
//3) Hourly pay rate .
//4) Number of exemptions.
//5) Tax rate.
//6) YTD hour worked.
//7) YTD gross pay.
//8) YTD net pay.
//This program will provide and test at least 10 different employees.
//YOu are to create a modular, menu driven program which  will do at least the following:
//1) Fill the employee objects.
//2) Set all YTD balances to zero.
//3) Input hours worked for various employees for s given pay period. Calculate teh gross
//   and net pay  for that pay period and update all YTd fields.
//4) print paycheck stub for each employee who worked during the period.
//5) Input and change pay rate, exemptions and or name for various employee.
//6) Print a report showing vacation day for the every 100 YTD hours.
//7) Print a report showing YTD figures for each empoyee.
 

#include <string.h>
#include <iostream.h>
#include <fstream.h>
#include <iomanip.h>
#include <math.h>
#include <stdlib.h>
#include "PayRollData.h"
//prototypes
int GetFile (PayRoll* EmployeeData);

void MenuFunction (PayRoll* EmployeeData);

int DoNumFunc(PayRoll* EmployeeData);

void DoRezeroFunc(PayRoll* EmployeeData, int HowMany);

void ChangeNumFunc(PayRoll* EmployeeData, int HowMany);

void DoInputHourFunc(PayRoll* EmployeeData, int HowMany);

void EditNameFunc(PayRoll* EmployeeData, int HowMany);

void EditPayRateFunc(PayRoll* EmployeeData, int HowMany);

void PrintAllFunc(PayRoll* EmployeeData, int HowMany);

void PrintVacationFunc(PayRoll* EmployeeData, int HowMany);

//global constant
const int TotalEmployeeNum=10;

//input: nothing going 
//declares class object and call menu functions 
//output: returning the integer.
int main (void)
{

	char Answer;

	PayRoll EmployeeData [TotalEmployeeNum];

	cout <<"	$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$"<<endl;
	cout <<"	$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$"<<endl;
	cout <<endl;
	cout <<"	   Do you want to do the  PayRoll calculation?"<<endl;
	cout <<"		(Y or N)"<<endl;
	cout <<endl;
	cout <<"	$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$"<<endl;
	cout <<"	$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$"<<endl;
	cout <<endl;
	cin.get(Answer);
	cin.ignore();

	if (Answer=='N'|| Answer=='n')
	{  
		cout <<endl;
		cout <<endl;
		cout <<endl;
		cout <<endl;
		cout <<endl;
		cout <<endl;
		cout <<"			**********************"<<endl;
		cout <<"		    	    Good-Bye!!!"<<endl;
		cout <<"			**********************"<<endl;
		exit(0);
	}
	else
		GetFile(EmployeeData);//calling Getfile to open the file containing the data.

		for (;;)
		{
			MenuFunction( EmployeeData);//calling the menu functions
		}
	return 0;
}
//menu function
//input:passing object
//print the menu
//calling most of the functions
//output returning nothing
void MenuFunction (PayRoll *EmployeeData)
{
	static int HowMany=0;
	int Choice;
	

	//printing the menu
	cout <<"	****************************************"<<endl;
	cout <<"	1- Enter # of Employee"<<endl;
	cout <<"	2- Set YTD Balances to Zero" <<endl;
	cout <<"	3- Enter Hours Employee Worked" <<endl;
	cout <<"	4- Print a Report for the Vacation Time"<<endl;
	cout <<"	5- Print a Report for the YTD Figures"<<endl;
	cout <<"	6- Edit Pay Rate" <<endl;
	cout <<"	7- Change Exemption " <<endl;
	cout <<"	8- Change Employee Name"<<endl;
	cout <<endl;
	cout <<"	9- Quit"<<endl;
	cout <<"	*****************************************"<<endl;


	cout <<"Enter your choice=>"<<endl;
	cin >> Choice;
	cin.ignore();


	switch (Choice)
	{
	//calling function to ask how many employee number
	case 1: 
		cout <<"	 You selected choice 1. "<<endl;
		cout <<"	~~~~~~~~~~~~~~~~~~~~~~~~"<<endl;
		HowMany=DoNumFunc(EmployeeData);
		//returned static variable
		break;
	//calling to set all YTD to zero
	case 2:
		cout <<"	 You selected choice 2. "<<endl;
		cout <<"	~~~~~~~~~~~~~~~~~~~~~~~~"<<endl;
		DoRezeroFunc(EmployeeData, HowMany);
		break;
	//calling to ask user to enter the hours of employee worked
	case 3:
		cout <<"        You selected choice 3. "<<endl;
		cout <<"	~~~~~~~~~~~~~~~~~~~~~~~~~~~"<<endl;
		DoInputHourFunc(EmployeeData, HowMany);
		break;
	//calling to print vacation time and report
	case 4:
		cout <<"	 You selected choice 4. "<<endl;
		cout <<"	~~~~~~~~~~~~~~~~~~~~~~~~"<<endl;
		PrintVacationFunc(EmployeeData, HowMany);
		break;
	//calling to print entire report
	case 5: 
		cout <<"	 You selected choice 5. "<<endl;
		cout <<"	~~~~~~~~~~~~~~~~~~~~~~~~"<<endl;
		PrintAllFunc(EmployeeData, HowMany);
		break;
	//calling to edit pay rate
	case 6: 
		cout <<"	 You selected choice 6. "<<endl;
		cout <<"	~~~~~~~~~~~~~~~~~~~~~~~~"<<endl;
		EditPayRateFunc(EmployeeData, HowMany);
		break;
	//calling to change exemption numbers
	case 7: 
		cout <<"	 You selected choice 7. "<<endl;
		cout <<"	~~~~~~~~~~~~~~~~~~~~~~~~"<<endl;
		ChangeNumFunc(EmployeeData, HowMany);
		break;
	//calling to edit name
	case 8: 
		cout <<"	 You selected choice 8. "<<endl;
		cout <<"	~~~~~~~~~~~~~~~~~~~~~~~~"<<endl;
		EditNameFunc(EmployeeData, HowMany);
		break;
	//calling to quit the program
	case 9:
		cout <<"	 You Selected : QUIT!!"<<endl;
		cout <<"	~~~~~~~~~~~~~~~~~~~~~~"<<endl;
		exit(0);
	//checking the invalid selection.
	default:
		cout <<endl;
		cout <<endl;
		cout <<"	????????????????????????????????"<<endl;
		cout <<"	You entered an invalid choice!!!"<<endl;
		cout <<"	????????????????????????????????"<<endl;
	}
}

//input: employee object
//asks how many employees are to be added
//output: returns integer
int DoNumFunc(PayRoll* EmployeeData)
{
	int HowMany=0;
	
	cout <<endl;
	cout <<"	How many employees do you want to enter? "<<endl;
	cin >> HowMany;
	
	return HowMany;
	
}
//input;employeedata object and howmany static variable.
//seting the all YTD values to zero.
//output:returns nothing 
void DoRezeroFunc(PayRoll* EmployeeData, int HowMany)
{
	int i;

	for(i=0; i<HowMany; ++EmployeeData, i++)
	{
		EmployeeData->SetYTDGrossPay(0);
		EmployeeData->SetYTDHrWorked(0);
		EmployeeData->SetYTDNetPay(0);
	}
}
//input;employeedata object and howmany static variable.
//entering the hours worked by the employees
//output: returns nothing
void DoInputHourFunc(PayRoll* EmployeeData, int HowMany)
{
	int i;
	int WorkerNum;
	double HourWorked, TempTotalHour;
	double OverTime;
	double GrossPay, TempGrossPay, Deduction;
	double NetPay,TempNetPay; 
	
	cout <<setprecision(2)
		<<setiosflags(ios::fixed|ios::showpoint);


	cout <<"	 Enter your employee Number=> "<<endl;
	cout <<"	~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"<<endl;
	cin>>WorkerNum;
	

	for(i=0; i<HowMany && WorkerNum!= EmployeeData->GetEmployeeIdNum();EmployeeData++,i++)
			;//null
		if (i<HowMany)
			cout <<"	How many hours did he/she work?"<<endl;
			cin>> HourWorked;
			

			//adding weekly hours worked to YTD HOURs Worked
			TempTotalHour=EmployeeData->GetYTDHrWorked()+HourWorked;
			EmployeeData->SetYTDHrWorked(TempTotalHour);
		if(HourWorked>40)
		{
			OverTime=HourWorked-40;
	
			GrossPay=(40*EmployeeData->GetPayRate())+(1.5*EmployeeData->GetPayRate()*OverTime);
		}
		else
		{
			GrossPay=(HourWorked*EmployeeData->GetPayRate());
		}
			
			Deduction=(EmployeeData->GetTaxRate()*GrossPay)-(EmployeeData->GetExemptionNum()*15);
	
			NetPay=GrossPay-Deduction;
		
			//adding gross pay to YTD gross pay	
			TempGrossPay=EmployeeData->GetYTDGrossPay()+GrossPay;
			EmployeeData->SetYTDGrossPay(TempGrossPay);
			
			//adding netpay to YTD net pay
			TempNetPay=EmployeeData->GetYTDNetPay()+NetPay;
			EmployeeData->SetYTDNetPay(TempNetPay);


//printing paycheck stub for each employee number
			cout <<"******************************************"<<endl;
			cout <<"EmployeeID#:	"<<EmployeeData->GetEmployeeIdNum()<<endl;
			cout <<"Name:     	"<<EmployeeData->GetEmployeeName()<<endl;
			cout <<"PayRate:	 " <<EmployeeData->GetPayRate()<<endl;
			cout <<"#Exemption:	 "<<EmployeeData->GetExemptionNum()<<endl;
			cout <<"Tax Rate:	" <<EmployeeData->GetTaxRate()<<endl;
			cout <<"YTDHrWorked:	 "<<EmployeeData->GetYTDHrWorked()<<endl;
			cout <<"YTDGrossPay:	 "<<EmployeeData->GetYTDGrossPay()<<endl;
			cout <<"YTDNetPay:	 "<<EmployeeData->GetYTDNetPay()<<endl;
			cout <<"******************************************"<<endl;
}
//Input:passing object and total employee numbers
//calculating the vacation time and print the report
//output:nothing
void PrintVacationFunc(PayRoll* EmployeeData, int HowMany)
{
		int i;
		int VacationTime;
		

		cout <<setprecision(2)
			 <<setiosflags(ios::fixed|ios::showpoint);
	
		cout <<"	Vacation Report:"<<endl;
		cout <<"	@@@@@@@@@@@@@@@@"<<endl;
		//print employee number and name and total vacation time in # of day
		
		cout <<"*************************************************************************"<<endl;
		
		cout <<"Employee Id#"
			 <<setw(10)<<"Name"
			 <<setw(25)<<"Total vacation Day"
			 <<setw(26)<<"YTDHrWorked"<<endl;
		cout <<"*************************************************************************"<<endl;
		
		for (i=0;i<HowMany; EmployeeData++, i++)
		{	
			VacationTime=int (EmployeeData->GetYTDHrWorked()/100);
			
			cout<<setw(5)<<EmployeeData->GetEmployeeIdNum()
				<<setw(19)<<EmployeeData->GetEmployeeName()
				<<setw(17)<<VacationTime
				<<setw(26)<<EmployeeData->GetYTDHrWorked()<<endl;
	
		}
		
}
//input;employeedata object and howmany static variable.
//print the all variables.
//output: returns nothing.
void PrintAllFunc(PayRoll* EmployeeData, int HowMany)
{
	cout <<setprecision(2)
		 <<setiosflags(ios::fixed|ios::showpoint);

	int i;
	cout<<endl;
	cout<<"******************************************************************************"<<endl;
	cout<<"ID#"
		<<setw(10)<<"Name"
		<<setw(21)<<"YTDHourWorked"
		<<setw(21)<<"YTDGrossPay"
		<<setw(23)<<"YTDNetPay"<<endl;

	cout<<"******************************************************************************"<<endl;
		
	for(i=0;i<HowMany;EmployeeData++, i++)
	{
		cout<<EmployeeData->GetEmployeeIdNum()
			<<setw(13)<<EmployeeData->GetEmployeeName()
			<<setw(13)<<EmployeeData->GetYTDHrWorked()
			<<setw(20)<<EmployeeData->GetYTDGrossPay()
			<<setw(24)<<EmployeeData->GetYTDNetPay()<<endl;
	}

}
//input;employeedata object and howmany static variable.
//seting the pay rate
//output: returns nothing
void EditPayRateFunc(PayRoll* EmployeeData, int HowMany)
{
	int i;
	int WorkerNum;
	float NewPayRate;
	
	cout <<endl;
	
	cout <<"	Which employee's Pay Rate do you want to edit?"<<endl;
	cout <<"	Enter your employee Number =>"<<endl;
	cout <<"	~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"<<endl;
	cin>>WorkerNum;
	cin.ignore();

	for(i=0; i<HowMany&& WorkerNum!= EmployeeData->GetEmployeeIdNum();EmployeeData++,i++)
			;//null
	if(i<HowMany)
		
		cout <<endl;
		cout <<"	Enter New Pay Rate => "<<endl;
		cout <<endl;
		cin >>NewPayRate;
		cin.ignore();

		EmployeeData->SetPayRate(NewPayRate);
		cout <<endl;

}
////input;employeedata object and howmany static variable.
//changes the exemption numbers.
//output: returns nothing.
void ChangeNumFunc(PayRoll* EmployeeData, int HowMany)
{
	int i;
	int WorkerNum;
	int NewExemptionNum;
	
	cout <<endl;
	
	cout <<"	Which employee do you want to change?"<<endl;
	cout <<"	Enter your employee Number =>"<<endl;
	cout <<"	~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"<<endl;
	cout <<endl;
	cin>>WorkerNum;
	cin.ignore();
	for(i=0; i<HowMany&& WorkerNum!= EmployeeData->GetEmployeeIdNum();EmployeeData++,i++)
			;//null
	if(i<HowMany)
		
		cout <<"	Enter new Exemption Number =>"<<endl;
		cout <<endl;
		cin>>NewExemptionNum;
		cin.ignore();

		EmployeeData->SetExemptionNum(NewExemptionNum);
	
}
//input:passing the object and # of employee
//editing function for the name
//setting the new name
//output:returning nothing
void EditNameFunc(PayRoll* EmployeeData, int HowMany)
{
	int i;
	int WorkerNum;
	char NewName[80];
	
	cout <<"	Which employee's Name do you want to edit?"<<endl;
	cout <<"	Enter your employee Number => "<<endl;
	cout <<"	~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"<<endl;
	cin >>WorkerNum;
	cin.ignore();

	for(i=0; i<HowMany && WorkerNum!= EmployeeData->GetEmployeeIdNum();EmployeeData++,i++)
			;//null
	if(i<HowMany)
		
		cout <<endl;
		
		cout <<"	Enter new Name =>"<<endl;
	
		cin.getline(NewName, 81);
		cout <<endl;
		EmployeeData->SetEmployeeName(NewName);
		
}


//input : passing the employeedata object
//geting out the file to initialize the objects.
//output: returnsthe integers.
int GetFile (PayRoll* EmployeeData)
{ 
	char FileName[81];
	int i;
	ifstream InputFile;
	cout <<endl;
	cout <<"	~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"<<endl;
	cout <<"	Enter the Name of the file which contains"<<endl;
	cout <<"	  all the employee PayRoll information:"<<endl;
	cout <<"		(My file name is data.txt )     "<<endl;
	cout <<"	~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"<<endl;

	cin.getline(FileName, 81);

	InputFile.open(FileName, ios::nocreate);
	if (InputFile.fail())
	{
		cout <<"File can't be opened!!"<<endl;
		cout <<"it will exit out!!!"<<endl;
		exit(0);
		
	}
	cout <<"File Open successfully. "<<endl;
	cout <<"Now Reading EmployeeData from the file."<<endl;
	for (i=0; i<10; i++)
	{

		
		char TempName[80];
	
		int TempIdNum;
		float TempHrPayRate;
		int TempExemption;
		float TempTaxRate;
		
		double TempYTDHrWorked;
		double TempYTDGrossPay;
		double TempYTDNetPay;

		
		InputFile >> TempIdNum;
		EmployeeData->SetEmployeeIdNum(TempIdNum);
		cout <<EmployeeData->GetEmployeeIdNum()<<endl;
		
		InputFile >> TempName;
	
		EmployeeData->SetEmployeeName(TempName);
		cout << EmployeeData->GetEmployeeName()<<endl;
		
		
		InputFile >> TempHrPayRate;
		EmployeeData->SetPayRate(TempHrPayRate);
		cout <<EmployeeData->GetPayRate()<<endl;

		InputFile >> TempExemption;
		EmployeeData->SetExemptionNum(TempExemption);
		cout <<EmployeeData->GetExemptionNum()<<endl;

		InputFile >> TempTaxRate;
		EmployeeData->SetTaxRate(TempTaxRate);
		cout <<EmployeeData->GetTaxRate()<<endl;

		InputFile >> TempYTDHrWorked;
		EmployeeData->SetYTDHrWorked(TempYTDHrWorked);
		cout <<EmployeeData->GetYTDHrWorked()<<endl;

		InputFile >> TempYTDGrossPay;
		EmployeeData->SetYTDGrossPay(TempYTDGrossPay);
		cout <<EmployeeData->GetYTDGrossPay()<<endl;

		InputFile >> TempYTDNetPay;
		EmployeeData->SetYTDNetPay(TempYTDNetPay);
		cout <<EmployeeData->GetYTDNetPay()<<endl;

		++EmployeeData;
		
	}
	InputFile.close();
	return 1;

}
//end of Program Here!!!