//********************************************************
//
// Assignment 6 - Structures
//
// Name: Brian Fallon
//
// Class: C Programming, Spring 2025
//
// Date: March 4, 2025
//
// Description: Program which determines overtime and 
// gross pay for a set of employees with outputs sent 
// to standard output (the screen).
//
// Call by Value design
//
//********************************************************

// Define and Includes

#include <stdio.h>

// Define Constants
#define SIZE 5
#define STD_HOURS 40.0
#define OT_RATE 1.5

// Define a global structure to pass employee data between functions
// Note that the structure type is global, but you don't want a variable
// of that type to be global. Best to declare a variable of that type
// in a function like main or another function and pass as needed.

struct employee
{
    long int clockNumber;
    float wageRate;
    float hoursTotal;
    float overtimeHrs;
    float grossPay;
    float normalPay; // added for computation of gross pay
    float overtimePay; // added for computation of gross pay
};

// define prototypes here for each function except main
float getHours (long int clockNumber);
void printHeader (void);
void printEmp (long int clockNumber, float wageRate, float hoursTotal,
               float overtimeHrs, float grossPay);

// TODO: Add your other function prototypes here
float calcOT (float hoursTotal); 
float calcGross (float wageRate, float hoursTotal, float overtimeHrs);

int main ()
{
    // Set up a local variable to store the employee information
    struct employee employeeData[SIZE] = {
        { 98401, 10.60 },
        { 526488, 9.75 },
        { 765349, 10.50 }, // Initialize clock and wage values
        { 34645, 12.25 },
        { 127615, 8.35 }
    };

    int i;  // Loop and Array index

    // Call functions as needed to read and calculate information
    for (i = 0; i < SIZE; ++i) 
    { 

       // Prompt for the number of hours worked by the employee
       employeeData[i].hoursTotal = getHours (employeeData[i].clockNumber); 

       // TODO: Add other function calls as needed to calculate overtime and gross
       
	   // Overtime Hours Call
		employeeData[i].overtimeHrs = calcOT(employeeData[i].hoursTotal); 
	   // Gross Pay Call
	    employeeData[i].grossPay = calcGross(employeeData[i].wageRate, employeeData[i].hoursTotal, 
	   		employeeData[i].overtimeHrs); 

    } // End for

    // Print the column headers
    printHeader();

    // Print out each employee
    for (i = 0; i < SIZE; ++i) 
    { 
        printEmp (employeeData[i].clockNumber, 
                  employeeData[i].wageRate, 
                  employeeData[i].hoursTotal,
                  employeeData[i].overtimeHrs, 
                  employeeData[i].grossPay);
    }

    return(0); // success

} // End main

//**************************************************************
// Function: getHours 
// 
// Purpose: Obtains input from user, the number of hours worked 
// per employee and stores the result in a local variable 
// that is passed back to the calling function. 
// 
// Parameters: clockNumber - The unique employee ID
// 
// Returns: hoursWorked - hours worked in a given week
//  
//**************************************************************

float getHours (long int clockNumber) 
{ 

    float hoursWorked; // hours worked in a given week

    // Read in hours for employee
    printf("\nEnter hours worked by emp # %06li: ", clockNumber); 
    scanf ("%f", &hoursWorked); 

    // Return hours back to the calling function
    return (hoursWorked);
 
} // getHours

//**************************************************************
// Function: printHeader
// 
// Purpose: Prints the initial table header information.
// 
// Parameters: none
// 
// Returns: void
//  
//**************************************************************

void printHeader (void) 
{ 

    printf ("\n\n*** Pay Calculator ***\n");

    // Print the table header
    printf("\nClock# Wage  Hours  OT      Gross\n");
    printf("------------------------------------------------\n");

} // printHeader

//************************************************************* 
// Function: printEmp 
// 
// Purpose: Prints out all the information for an employee
// in a nice and orderly table format.
// 
// Parameters: 
//
//     clockNumber - unique employee ID
//     wageRate - hourly wage rate
//     hours - Hours worked for the week
//     overtimeHrs - overtime hours worked in a week
//     grossPay - gross pay for the week
// 
// Returns: void
//  
//**************************************************************

void printEmp (long int clockNumber, float wageRate, float hours,
                float overtimeHrs, float grossPay)
{

    // Print out a single employee
    printf("\n %06li %5.2f %4.1f %4.1f %8.2f",
          clockNumber, wageRate, hours,
          overtimeHrs, grossPay);

}  // printEmp

// TODO: Add your functions here
//************************************************************* 
// Function: calcOT
// 
// Purpose: Calculate the overtime hours of employees if logged
// more than the standard week 
//
// Parameters: 
//		hoursTotal- total logged hours per employee
//  	STD_HOURS - the standard amount of 40 hours per week   
// 
// Returns: overtimeHrs
//  
//**************************************************************

float calcOT (float hoursTotal) // Function Definition
{
	//local variable
	float overtimeHrs; 
	//computation
	if (hoursTotal > STD_HOURS)
	  {	
		overtimeHrs = hoursTotal - STD_HOURS;
	  }	
	//return computation
	return (overtimeHrs);
	
} // calcOT


//************************************************************* 
// Function: calcGross 
// 
// Purpose: Calculate the Gross Pay of employees considering
// any overtime hours logged
//
// Parameters: 
//		wageRate - hourly wage of employees
//		hoursTotal- the total hours logged for employees
//		overtimeHrs - any overtime hours for any applicable employee logs
// 
// Returns: grossPay
//  
//**************************************************************

float calcGross (float wageRate, float hoursTotal, float overtimeHrs) // Function Definition
{ 
	//local variable
	float grossPay;
	float normalPay;
	float overtimePay;
	//computation 
	if (hoursTotal > STD_HOURS)
        {
            overtimeHrs = hoursTotal - STD_HOURS;
    		overtimePay = overtimeHrs * (OT_RATE*wageRate);
    		normalPay = STD_HOURS*wageRate;
    		grossPay = normalPay + overtimePay;
        } // End if
 
    else // No Overtime
        {
			overtimeHrs=0;
			normalPay=wageRate*hoursTotal;
			grossPay=normalPay;
        } // End else	
    //Return computation		
	return (grossPay);
	
} // calcGross
//**************************************************************