//********************************************************
//
// Assignment 5 - Functions
//
// Name: Robert Liszka
//
// Class: C Programming, Spring, 2025
//
// Date: March 3rd, 2025
//
// Description: Program which determines overtime and 
// gross pay for a set of employees with outputs sent 
// to standard output (the screen).
//
// All functions are called by value
//
//********************************************************

#include <stdio.h>

// constants
#define SIZE 5
#define OVERTIME_RATE 1.5f
#define STD_WORK_WEEK 40.0f

// function prototypes
float getHours (long int clockNumber);
void printHeader (void);
void printEmp  (long int clockNumber, float wageRate, float hours,
                float overtimeHrs, float grossPay);

// TODO:  Add other function prototypes here as needed
float calcOT (float hours);
float calcGross (float wageRate,
float hours,
float overtimeHrs);

int main()
{

    /* Variable Declarations */

    long  int clockNumber[SIZE] = {98401,526488,765349,34645,127615}; // ID
    float grossPay[SIZE];     // gross pay
    float hours[SIZE];        // hours worked in a given week
    int   i;                  // loop and array index
    float overtimeHrs[SIZE];  // overtime hours
    float wageRate[SIZE] = {10.60,9.75,10.50,12.25,8.35}; // hourly wage rate
    
    

    // process each employee
    for (i = 0; i < SIZE; ++i)
    {

        // Read in hours for employee
        hours[i] = getHours (clockNumber[i]); 

        // TODO: Function call to calculate overtime hours
		overtimeHrs[i] = calcOT (hours[i]);
		
        // TODO: Function call to calculate gross pay
		grossPay[i] = calcGross (wageRate[i], hours[i], overtimeHrs[i]);
		
    }

    // print the header info
    printHeader();

    // print out each employee
    for (i = 0; i < SIZE; ++i)
    {

        // Print all the employees - call by value
        printEmp (clockNumber[i], wageRate[i], hours[i],
                   overtimeHrs[i], grossPay[i]);

    } // for

    return (0);

} // main

//**************************************************************
//Function: CalcOT
//
//Description: uses hours from employee input and subtracts from
//standard work week hours to get number of overtime hours worked.
//
//Parameters: hours - number of hours worked
//
//Return: overtimeHrs - numbers of hours worked past 40
//
//**************************************************************
float calcOT (float hours)
{
	float overtimeHrs;
	
	overtimeHrs = hours - STD_WORK_WEEK;
	
	return (overtimeHrs);
	
}// calcOT

//**************************************************************
//Function: calcGross
//
//Description: uses if statment to check if employee has worked
// overtime or not, then adds normal pay to overtime pay to get
// gross pay which is called back to the calling function.
//
//Parameters: wageRate - amount paid per hour
//			  hours - number of hours worked
//			  overtimeHrs - hours of overtime
//
//Returns: grossPay - nomrmal pay and overtime pay added together
//
//**************************************************************
float calcGross (float wageRate, float hours, float overtimeHrs)
{
	float grossPay; // gross pay to be calculated
	float normalPay; // normal pay earned
	float overtimePay; // overtime pay earned 
	
	// calulates gross pay, normal pay, and overtime pay
	if (hours > STD_WORK_WEEK) 
	{
		// calculate overtime hours
		overtimeHrs = hours - STD_WORK_WEEK;
		
		// calculate normal pay
		normalPay = STD_WORK_WEEK * wageRate;
		
		// calculate overtime pay
		overtimePay = overtimeHrs * wageRate * OVERTIME_RATE;
		
		}	
	else
	{
		//they have no overtime hours
		overtimeHrs = 0;
		overtimePay = 0;
		
		// calculate normal pay
		normalPay = hours * wageRate;
		
		}// for if
		
		
	grossPay = normalPay + overtimePay;		

	
	return(grossPay);	
	
}// calcgross

//**************************************************************
// 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 the employee
printf ("%06ld %5.2f %5.1f %5.1f \t%7.2f\n",
clockNumber, wageRate, hours, overtimeHrs, grossPay); 
    // TODO: add code to print out a single employee
}


// TODO: Add other functions here as needed
// ... remember your comment block headers for each function