//********************************************************
//
// Assignment 5 - Functions
//
// Name: <Haroon Malik>
//
// Class: C Programming, <Fall 2026>
//
// Date: <10/11/2026>
//
// 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);

float calcOvertime(float hours);
float calcGrossPay(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]); 

        overtimeHrs[i] = calcOvertime(hours[i]);

        grossPay[i] = calcGrossPay(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: 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("%06li %6.2f %7.2f %7.2f %10.2f\n",
           clockNumber, wageRate, hours, overtimeHrs, grossPay);
}


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

//************************************************************
// Function: calcOvertime
//
// Purpose: Calculates hours worked beyond the standard week.
//
// Parameters: hours - total hours worked during the week
//
// Returns: Overtime hours, or zero if no overtime was worked.
//************************************************************

float calcOvertime(float hours)
{
    if (hours > STD_WORK_WEEK)
    {
        return hours - STD_WORK_WEEK;
    }

    return 0.0f;
}

//************************************************************
// Function: calcGrossPay
//
// Purpose: Calculates regular pay plus overtime pay.
//
// Parameters:
//     wageRate - hourly wage rate
//     hours - total hours worked during the week
//     overtimeHrs - overtime hours worked during the week
//
// Returns: Total gross pay for the week.
//************************************************************

float calcGrossPay(float wageRate, float hours, float overtimeHrs)
{
    float regularHours = hours - overtimeHrs;

    return (regularHours * wageRate)
         + (overtimeHrs * wageRate * OVERTIME_RATE);
}