//********************************************************
//
// Assignment 7 - Structures and Strings
//
// Name: Anthony Principe
//
// Class: C Programming, Fall 2025
//
// Date: 11/2/2025
//
// Description: Program which determines overtime and 
// gross pay for a set of employees with outputs sent 
// to standard output (the screen).
//
// This assignment also adds the employee name, their tax state,
// and calculates the state tax, federal tax, and net pay. It
// also calculates totals, averages, minimum, and maximum values.
//
// Call by Reference design
//
//********************************************************
 
// necessary header files
#include <stdio.h>
#include <string.h>
#include <ctype.h>
 
// define constants
#define SIZE 5
#define STD_HOURS 40.0
#define OT_RATE 1.5
#define MA_TAX_RATE 0.05
#define NH_TAX_RATE 0.0
#define VT_TAX_RATE 0.06
#define CA_TAX_RATE 0.07
#define DEFAULT_TAX_RATE 0.08
#define NAME_SIZE 20
#define TAX_STATE_SIZE 3
#define FED_TAX_RATE 0.25
#define FIRST_NAME_SIZE 10
#define LAST_NAME_SIZE 10
 
// Define a structure type to store an employee name
struct name {
    char firstName[FIRST_NAME_SIZE];
    char lastName[LAST_NAME_SIZE];
};
 
// Define a structure type to pass employee data between functions
struct employee {
    struct name empName;
    char taxState[TAX_STATE_SIZE];
    long int clockNumber;
    float wageRate;
    float hours;
    float overtimeHrs;
    float grossPay;
    float stateTax;
    float fedTax;
    float netPay;
};
 
// totals
struct totals {
    float total_wageRate;
    float total_hours;
    float total_overtimeHrs;
    float total_grossPay;
    float total_stateTax;
    float total_fedTax;
    float total_netPay;
};
 
// min/max
struct min_max {
    float min_wageRate;
    float min_hours;
    float min_overtimeHrs;
    float min_grossPay;
    float min_stateTax;
    float min_fedTax;
    float min_netPay;
    float max_wageRate;
    float max_hours;
    float max_overtimeHrs;
    float max_grossPay;
    float max_stateTax;
    float max_fedTax;
    float max_netPay;
};
 
// Function prototypes
void getHours(struct employee employeeData[], int theSize);
void calcOvertimeHrs(struct employee employeeData[], int theSize);
void calcGrossPay(struct employee employeeData[], int theSize);
void calcStateTax(struct employee employeeData[], int theSize);
void calcFedTax(struct employee employeeData[], int theSize);
void calcNetPay(struct employee employeeData[], int theSize);
struct totals calcEmployeeTotals(struct employee employeeData[],
                                struct totals employeeTotals, int theSize);
struct min_max calcEmployeeMinMax(struct employee employeeData[],
                                  struct min_max employeeMinMax, int theSize);
void printHeader(void);
void printEmp(struct employee employeeData[], int theSize);
void printEmpStatistics(struct totals employeeTotals, 
                        struct min_max employeeMinMax, int theSize);
 
//********************************************************
 
// Used the template to fill in tax and totals logic and tested input hours.
int main() {
 
    struct employee employeeData[SIZE] = {
        { {"Connie", "Cobol"}, "MA", 98401, 10.60},
        { {"Mary", "Apl"}, "NH", 526488, 9.75 },
        { {"Frank", "Fortran"}, "VT", 765349, 10.50 },
        { {"Jeff", "Ada"}, "NY", 34645, 12.25 },
        { {"Anton", "Pascal"}, "CA",127615, 8.35 }
    };
 
    struct totals employeeTotals = {0,0,0,0,0,0,0};
    struct min_max employeeMinMax = {0,0,0,0,0,0,0,0,0,0,0,0,0,0};
 
    getHours(employeeData, SIZE);
    calcOvertimeHrs(employeeData, SIZE);
    calcGrossPay(employeeData, SIZE);
    calcStateTax(employeeData, SIZE);
    calcFedTax(employeeData, SIZE);
    calcNetPay(employeeData, SIZE);
 
    employeeTotals = calcEmployeeTotals(employeeData, employeeTotals, SIZE);
    employeeMinMax = calcEmployeeMinMax(employeeData, employeeMinMax, SIZE);
 
    printHeader();
    printEmp(employeeData, SIZE);
    printEmpStatistics(employeeTotals, employeeMinMax, SIZE);
 
    return 0;
}
 
//********************************************************
void getHours(struct employee employeeData[], int theSize) {
    int i;
    for(i = 0; i < theSize; i++) {
        printf("\nEnter hours worked by emp # %06li: ", employeeData
[i
].
clockNumber);         scanf("%f", &employeeData
[i
].
hours);     }
}
 
//********************************************************
void printHeader(void) {
    printf("\n\n*** Pay Calculator ***\n");     printf("\n---------------------------------------------------------------------------------");     printf("\nName                Tax  Clock#  Wage   Hours  OT   Gross   State  Fed      Net");     printf("\n                    State                           Pay     Tax    Tax      Pay");     printf("\n---------------------------------------------------------------------------------"); }
 
//********************************************************
void printEmp(struct employee employeeData[], int theSize) {
    int i;
    char name[FIRST_NAME_SIZE + LAST_NAME_SIZE + 1];
 
    for(i = 0; i < theSize; i++) {
        strcpy(name
, employeeData
[i
].
empName.
firstName);         strcat(name
, employeeData
[i
].
empName.
lastName);  
        printf("\n%-19s %-3s %06li %7.2f %5.1f %5.1f %7.2f %7.2f %7.2f %8.2f",             name, employeeData[i].taxState, employeeData[i].clockNumber, 
            employeeData[i].wageRate, employeeData[i].hours,
            employeeData[i].overtimeHrs, employeeData[i].grossPay, 
            employeeData[i].stateTax, employeeData[i].fedTax, 
            employeeData[i].netPay);
    }
}
 
//********************************************************
void calcOvertimeHrs(struct employee employeeData[], int theSize) {
    int i;
    for(i = 0; i < theSize; i++) {
        if(employeeData[i].hours > STD_HOURS)
            employeeData[i].overtimeHrs = employeeData[i].hours - STD_HOURS;
        else
            employeeData[i].overtimeHrs = 0;
    }
}
 
//********************************************************
void calcGrossPay(struct employee employeeData[], int theSize) {
    int i;
    float theNormalPay;
    float theOvertimePay;
 
    for(i = 0; i < theSize; i++) {
        theNormalPay = employeeData[i].wageRate * 
                      (employeeData[i].hours - employeeData[i].overtimeHrs);
        theOvertimePay = employeeData[i].overtimeHrs * 
                        (OT_RATE * employeeData[i].wageRate);
 
        employeeData[i].grossPay = theNormalPay + theOvertimePay;
    }
}
 
//********************************************************
void calcStateTax(struct employee employeeData[], int theSize) {
    int i;
    for(i = 0; i < theSize; i++) {
 
        if(strcmp(employeeData
[i
].
taxState, "MA") == 0)             employeeData[i].stateTax = employeeData[i].grossPay * MA_TAX_RATE;
        else if(strcmp(employeeData
[i
].
taxState, "NH") == 0)             employeeData[i].stateTax = employeeData[i].grossPay * NH_TAX_RATE;
        else if(strcmp(employeeData
[i
].
taxState, "VT") == 0)             employeeData[i].stateTax = employeeData[i].grossPay * VT_TAX_RATE;
        else if(strcmp(employeeData
[i
].
taxState, "CA") == 0)             employeeData[i].stateTax = employeeData[i].grossPay * CA_TAX_RATE;
        else
            employeeData[i].stateTax = employeeData[i].grossPay * DEFAULT_TAX_RATE;
    }
}
 
//********************************************************
void calcFedTax(struct employee employeeData[], int theSize) {
    int i;
    for(i = 0; i < theSize; i++) {
        employeeData[i].fedTax = employeeData[i].grossPay * FED_TAX_RATE;
    }
}
 
//********************************************************
void calcNetPay(struct employee employeeData[], int theSize) {
    int i;
    for(i = 0; i < theSize; i++) {
        employeeData[i].netPay =
            employeeData[i].grossPay - (employeeData[i].stateTax + employeeData[i].fedTax);
    }
}
 
//********************************************************
struct totals calcEmployeeTotals(struct employee employeeData[],
                                 struct totals employeeTotals, int theSize) {
    int i;
    for(i = 0; i < theSize; i++) {
        employeeTotals.total_wageRate += employeeData[i].wageRate;
        employeeTotals.total_hours += employeeData[i].hours;
        employeeTotals.total_overtimeHrs += employeeData[i].overtimeHrs;
        employeeTotals.total_grossPay += employeeData[i].grossPay;
        employeeTotals.total_stateTax += employeeData[i].stateTax;
        employeeTotals.total_fedTax += employeeData[i].fedTax;
        employeeTotals.total_netPay += employeeData[i].netPay;
    }
    return employeeTotals;
}
 
//********************************************************
struct min_max calcEmployeeMinMax(struct employee employeeData[],
                                  struct min_max employeeMinMax, int theSize) {
    int i;
 
    employeeMinMax.min_wageRate = employeeData[0].wageRate;
    employeeMinMax.min_hours = employeeData[0].hours;
    employeeMinMax.min_overtimeHrs = employeeData[0].overtimeHrs;
    employeeMinMax.min_grossPay = employeeData[0].grossPay;
    employeeMinMax.min_stateTax = employeeData[0].stateTax;
    employeeMinMax.min_fedTax = employeeData[0].fedTax;
    employeeMinMax.min_netPay = employeeData[0].netPay;
 
    employeeMinMax.max_wageRate = employeeData[0].wageRate;
    employeeMinMax.max_hours = employeeData[0].hours;
    employeeMinMax.max_overtimeHrs = employeeData[0].overtimeHrs;
    employeeMinMax.max_grossPay = employeeData[0].grossPay;
    employeeMinMax.max_stateTax = employeeData[0].stateTax;
    employeeMinMax.max_fedTax = employeeData[0].fedTax;
    employeeMinMax.max_netPay = employeeData[0].netPay;
 
    for(i = 1; i < theSize; i++) {
 
        if(employeeData[i].wageRate < employeeMinMax.min_wageRate)
            employeeMinMax.min_wageRate = employeeData[i].wageRate;
        if(employeeData[i].wageRate > employeeMinMax.max_wageRate)
            employeeMinMax.max_wageRate = employeeData[i].wageRate;
 
        if(employeeData[i].hours < employeeMinMax.min_hours)
            employeeMinMax.min_hours = employeeData[i].hours;
        if(employeeData[i].hours > employeeMinMax.max_hours)
            employeeMinMax.max_hours = employeeData[i].hours;
 
        if(employeeData[i].overtimeHrs < employeeMinMax.min_overtimeHrs)
            employeeMinMax.min_overtimeHrs = employeeData[i].overtimeHrs;
        if(employeeData[i].overtimeHrs > employeeMinMax.max_overtimeHrs)
            employeeMinMax.max_overtimeHrs = employeeData[i].overtimeHrs;
 
        if(employeeData[i].grossPay < employeeMinMax.min_grossPay)
            employeeMinMax.min_grossPay = employeeData[i].grossPay;
        if(employeeData[i].grossPay > employeeMinMax.max_grossPay)
            employeeMinMax.max_grossPay = employeeData[i].grossPay;
 
        if(employeeData[i].stateTax < employeeMinMax.min_stateTax)
            employeeMinMax.min_stateTax = employeeData[i].stateTax;
        if(employeeData[i].stateTax > employeeMinMax.max_stateTax)
            employeeMinMax.max_stateTax = employeeData[i].stateTax;
 
        if(employeeData[i].fedTax < employeeMinMax.min_fedTax)
            employeeMinMax.min_fedTax = employeeData[i].fedTax;
        if(employeeData[i].fedTax > employeeMinMax.max_fedTax)
            employeeMinMax.max_fedTax = employeeData[i].fedTax;
 
        if(employeeData[i].netPay < employeeMinMax.min_netPay)
            employeeMinMax.min_netPay = employeeData[i].netPay;
        if(employeeData[i].netPay > employeeMinMax.max_netPay)
            employeeMinMax.max_netPay = employeeData[i].netPay;
    }
 
    return employeeMinMax;
}
 
//********************************************************
void printEmpStatistics(struct totals employeeTotals, 
                        struct min_max employeeMinMax, int theSize) {
 
    printf("\n---------------------------------------------------------------------------------");  
    printf("\nTotals:                          %5.2f %5.1f %5.1f %7.2f %7.2f %7.2f %8.2f",         employeeTotals.total_wageRate,
        employeeTotals.total_hours,
        employeeTotals.total_overtimeHrs,
        employeeTotals.total_grossPay,
        employeeTotals.total_stateTax,
        employeeTotals.total_fedTax,
        employeeTotals.total_netPay );
 
    printf("\nAverages:                        %5.2f %5.1f %5.1f %7.2f %7.2f %7.2f %8.2f",         employeeTotals.total_wageRate/theSize,
        employeeTotals.total_hours/theSize,
        employeeTotals.total_overtimeHrs/theSize,
        employeeTotals.total_grossPay/theSize,
        employeeTotals.total_stateTax/theSize,
        employeeTotals.total_fedTax/theSize,
        employeeTotals.total_netPay/theSize );
 
    printf("\nMinimum:                         %5.2f %5.1f %5.1f %7.2f %7.2f %7.2f %8.2f",         employeeMinMax.min_wageRate,
        employeeMinMax.min_hours,
        employeeMinMax.min_overtimeHrs,
        employeeMinMax.min_grossPay,
        employeeMinMax.min_stateTax,
        employeeMinMax.min_fedTax,
        employeeMinMax.min_netPay );
 
    printf("\nMaximum:                         %5.2f %5.1f %5.1f %7.2f %7.2f %7.2f %8.2f\n",         employeeMinMax.max_wageRate,
        employeeMinMax.max_hours,
        employeeMinMax.max_overtimeHrs,
        employeeMinMax.max_grossPay,
        employeeMinMax.max_stateTax,
        employeeMinMax.max_fedTax,
        employeeMinMax.max_netPay );
}