//********************************************************
//
// Assignment 5 - Functions
//
// Name: Rose Samedi
//
// Class: C Programming, Fall 2025
//
// Date: 10/20/2025
//
// 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 1.5
#define STD_WORK_WEEK 40.0
 
// function prototypes
float getHours (long int clockNumber);
void printHeader (void);
void printEmp  (long int clockNumber, float wageRate, float hours,
                float overtimeHrs, float grossPay);
float calculateOvertime(float hours);
float calculateGrossPay(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]); 
 
        // Function call to calculate overtime hours
        overtimeHrs[i] = calculateOvertime(hours[i]);
 
        // Function call to calculate gross pay
        grossPay[i] = calculateGrossPay(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
//**************************************************************
float getHours (long int clockNumber)
{
    float hours;
    printf("Enter hours worked for employee %06ld: ", clockNumber
);     return hours;
}
 
//**************************************************************
// Function: printHeader 
// 
// Purpose: Prints the header for the employee payroll table
//**************************************************************
void printHeader (void)
{
    printf("\n*** Pay Calculator ***\n\n");     printf("Clock #\t| Wage\t| Hours\t| OT\t| Gross\n");     printf("--------|-------|-------|-------|--------\n"); }
 
//**************************************************************
// Function: printEmp 
// 
// Purpose: Prints a single line of employee information
//**************************************************************
void printEmp (long int clockNumber, float wageRate, float hours,
               float overtimeHrs, float grossPay)
{
    printf("%06ld\t| %5.2f\t|%5.1f\t|%5.1f\t|%7.2f\n",            clockNumber, wageRate, hours, overtimeHrs, grossPay);
}
 
//**************************************************************
// Function: calculateOvertime 
// 
// Purpose: Calculates overtime hours based on standard work week
//**************************************************************
float calculateOvertime(float hours)
{
    if (hours > STD_WORK_WEEK)
    {
        return hours - STD_WORK_WEEK;
    }
    else
    {
        return 0.0f;
    }
}
 
//**************************************************************
// Function: calculateGrossPay 
// 
// Purpose: Calculates gross pay including overtime wages
//**************************************************************
float calculateGrossPay(float wageRate, float hours, float overtimeHrs)
{
    float regularPay;
    float overtimePay;
 
    if (overtimeHrs > 0)
    {
        regularPay = STD_WORK_WEEK * wageRate;
        overtimePay = overtimeHrs * (wageRate * OVERTIME_RATE);
        return regularPay + overtimePay;
    }
    else
    {
        return hours * wageRate;
    }
}