//********************************************************
//
// Assignment 6 - Structures
//
// Name: <Adrian>
//
// Class: C Programming, <Fall 2026>
//
// Date: <October 16, 2026>
//
// 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 hours;
    float overtimeHrs;
    float grossPay;
};

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

// TODO: Add your other function prototypes here
float calculateOvertime(float hours);
float calculateGrossPay(float wageRate, float hours,
                        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].hours = getHours (employeeData[i].clockNumber);

       // TODO: Add other function calls as needed to calculate overtime and gross
       employeeData[i].overtimeHrs =
           calculateOvertime(employeeData[i].hours);

       employeeData[i].grossPay =
           calculateGrossPay(employeeData[i].wageRate,
                             employeeData[i].hours,
                             employeeData[i].overtimeHrs);

    } // 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].hours,
                  employeeData[i].overtimeHrs,
                  employeeData[i].grossPay);
    }

    return(0); // success

} // 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(" %06li %5.2f %4.1f %4.1f %8.2f\n",
          clockNumber, wageRate, hours,
          overtimeHrs, grossPay);

}  // printEmp

// TODO: Add your functions here

float calculateOvertime(float hours)
{
    float overtimeHrs;

    if (hours > STD_HOURS)
    {
        overtimeHrs = hours - STD_HOURS;
    }
    else
    {
        overtimeHrs = 0.0;
    }

    return(overtimeHrs);
}

float calculateGrossPay(float wageRate, float hours,
                        float overtimeHrs)
{
    float normalPay;
    float overtimePay;
    float grossPay;

    if (hours > STD_HOURS)
    {
        normalPay = STD_HOURS * wageRate;
    }
    else
    {
        normalPay = hours * wageRate;
    }

    overtimePay = overtimeHrs * wageRate * OT_RATE;
    grossPay = normalPay + overtimePay;

    return(grossPay);
}