New Version

#include <iostream>
#include <iomanip>

using namespace std;

double operatorOne (double a, double b)
    {
        return (a / b);
    }
double operatorTwo (double a, double b)
    {
        return (a * b);
    }
double operatorThree (double a, double b)
    {
        return (a * 40 + 1.5 * a * (b - 40));
    }
double TaxOperator (double a, double b)
    {
        return a - (a * b);
    }

int main()
{
    cout << fixed << setprecision(2);
    char employee = ' ';
    const double standardTax = 0.075;
    const double numOfWeeks = 52;
    do{
        cout << "Welcome to Whirlpool Industries Employee Stipend Calculation System." << endl; // Start of program, welcomes user.
        cout << "This program will produce a calculation of your weekly net pay." << endl; //Explains what program will do.
        cout << "Whirlpool Inc. Employees are categorized into the following categories: Salaried, Hourly, and Contracted." << endl; //Explains how employees are categorized.
        cout << "Please enter what type of employee you are. (Use S, H, or C)[Enter 0 to quit.]" << endl; //Prompts user to pick a category or to quit.
        cin >> employee;
        if(employee == '0')
            {
                return 0;
        }
        if(employee != 'S' && employee != 'H' && employee != 'C') cout << "Invalid input, please try again." << endl; //Shows that user input incorrect information
        if (employee == 'S')
            {
                double yearlySalary;
                cout << "Please enter your yearly salary." << endl;
                cin >> yearlySalary;
                double weeklySalary = operatorOne(yearlySalary, numOfWeeks);
                float grossPayOne;
                float grossPayTwo;
                cout << "Your weekly stipend is: $" << weeklySalary << endl;  // Gives weekly stipend
                if (weeklySalary > 3000)
                    {
                        cout << "The tax rate for your weekly paycheck is 0.075%." << endl;
                        grossPayOne = TaxOperator(weeklySalary, standardTax);
                        cout << "Your Take Home Stipend is: $" << grossPayOne << endl; // Take Home Stipend
                    }
                else if (weeklySalary < 3000)
                    {
                        double userTaxRate;
                        cout << "Please enter your tax rate." << endl;
                        cin >> userTaxRate;
                        grossPayTwo = TaxOperator(weeklySalary, userTaxRate);
                        cout << "Your Take Home Stipend is: $" << grossPayTwo << endl; // Take Home Stipend
                    }
            }
        if (employee == 'H')
            {
                int taxChoice = 0;
                double hourlyRate;
                double numOfHours;
                cout << "Please enter your hourly rate." << endl; //Prompts user to input their pay rate
                cin >> hourlyRate;
                cout << "Please enter your number of hours." << endl; //Prompts user to input amount of hours in a week
                cin >> numOfHours;
                if (numOfHours < 40)
                    {
                        float HomePayOne;
                        double hourWeekSalaryOne = operatorTwo(hourlyRate, numOfHours);
                        cout << "Your weekly stipend is: $" << hourWeekSalaryOne << endl;  // Gives weekly stipend
                        cout << "Would you like to use the standard 0.075% tax rate or your own? (Enter 0 for standard or 1 for your own)" << endl; //Prompts user to choose between standard tax rate or their user-inputted tax rate.
                        cin >> taxChoice;
                        if (taxChoice == 0)
                            {
                                HomePayOne = TaxOperator(hourWeekSalaryOne, standardTax);
                                cout << "Your Take Home Stipend is: $" << HomePayOne << endl; // Take Home Stipend
                            }
                        else if (taxChoice == 1)
                            {
                                double UserTaxRateOne;
                                cout << "Please enter your tax rate." << endl;
                                cin >> UserTaxRateOne;
                                HomePayOne = TaxOperator(hourWeekSalaryOne, UserTaxRateOne);
                                cout << "Your Take Home Stipend is: $" << HomePayOne << endl; // Take Home Stipend
                            }
                    }
                else if (numOfHours > 40)
                    {
                        double UserTaxRateTwo;
                        float HomePayTwo;
                        double hourWeekSalaryTwo = operatorThree(hourlyRate, numOfHours);
                        cout << "Your weekly stipend is: $" << hourWeekSalaryTwo << endl;  // Gives weekly stipend
                        cout << "Would you like to use the standard 0.075% tax rate or your own? (Enter 0 for standard or 1 for your own)" << endl;  //Prompts user to choose between standard tax rate or their user-inputted tax rate.
                        cin >> taxChoice;
                        if (taxChoice == 0)
                            {
                                HomePayTwo = TaxOperator(hourWeekSalaryTwo, standardTax);
                                cout << "Your Take Home Stipend is: $" << HomePayTwo << endl; // Take Home Stipend
                            }
                        else if (taxChoice == 1)
                            {
                                cout << "Please enter your tax rate." << endl;
                                cin >> UserTaxRateTwo;
                                HomePayTwo = TaxOperator(hourWeekSalaryTwo, UserTaxRateTwo);
                                cout << "Your Take Home Stipend is: $" << HomePayTwo << endl; // Take Home Stipend
                            }
                    }
                }
        if (employee == 'C')
            {
                double contractAmount;
                cout << "Please enter amount stated in your contract." << endl; //Prompts user to input amount from contract
                cin >> contractAmount;
                double contractSalary = operatorOne(contractAmount, numOfWeeks);
                cout << "Your weekly stipend is: $" << contractSalary << endl; // Gives weekly stipend
                if (contractSalary >= 3000)
                    {
                        float TakeHomePayOne;
                        TakeHomePayOne = TaxOperator(contractSalary, standardTax);
                        cout << "Your Take Home Stipend is: $" << TakeHomePayOne << endl; // Take Home Stipend
                    }
                else if (contractSalary < 3000)
                    {
                        double InputTaxRate;
                        float TakeHomePayTwo;
                        cout << "Please enter your tax rate." << endl;
                        cin >> InputTaxRate;
                        TakeHomePayTwo = TaxOperator(contractSalary, InputTaxRate);
                        cout << "Your Take Home Stipend is: $" << TakeHomePayTwo << endl; // Take Home Stipend
                    }
            }
    }while(employee == 'S' || employee == 'H' || employee == 'C');
    return 0;
}