//********************************************************
//
// Assignment 6 - Structures
//
// Name: Rose Samedi
//
// Class: C Programming, Fall 2025
//
// Date: 10/26/25
//
// Description: Program which determines overtime and
// gross pay for a set of employees with outputs sent
// to standard output (the screen).
//
// Functions called by a combination of by value and by
// reference.
//
//********************************************************
// 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(struct employee emp[], int theSize);
 
// TODO: Add your other function prototypes here
void calculatePay(struct employee *emp);
 
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
        calculatePay(&employeeData[i]);
    } // for
 
    // Print the column headers
    printHeader();
 
    // Function call to output results to the screen in table format.
    printEmp(employeeData, SIZE);
 
    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: Outputs to screen in a table format the following
// information about an employee: Clock, Wage,
// Hours, Overtime, and Gross Pay.
//
// Parameters:
//
// employeeData - an array of structures containing
// employee information
// theSize - number of employees to process
//
// Returns: Nothing (void)
//
// *******************************************************************
void printEmp(struct employee employeeData[], int theSize) {
    int i; // loop index
    // print information about each employee
    for (i = 0; i < theSize; ++i) {
        printf("\n %06li %5.2f %4.1f %4.1f %8.2f",                employeeData[i].clockNumber,
               employeeData[i].wageRate,
               employeeData[i].hours,
               employeeData[i].overtimeHrs,
               employeeData[i].grossPay);
    } // for
} // printEmp
 
// TODO: Add your functions here
//**************************************************************
// Function: calculatePay
//
// Purpose: Calculates the overtime hours and gross pay for an
// employee based on standard hours and overtime rate.
//
// Parameters:
//
// emp - A pointer to an employee structure to
// calculate and update pay information for.
//
// Returns: Nothing (void)
//
//**************************************************************
void calculatePay(struct employee *emp) {
    if (emp->hours > STD_HOURS) {
        emp->overtimeHrs = emp->hours - STD_HOURS;
        emp->grossPay = (STD_HOURS * emp->wageRate) + (emp->overtimeHrs * (emp->wageRate * OT_RATE));
    } else {
        emp->overtimeHrs = 0.0;
        emp->grossPay = emp->hours * emp->wageRate;
    }
} // calculatePay