MonthEndBalance.h

// MonthEndBalannce Class Bkelly
#pragma once
#include <string>
using namespace std;

class MonthEndBalance {
    double previousBalance, payments, charges, financeCharges, newBalance, monthEndBalance;
    string LastName;
public:
    double NewBalanceCalc(double, double, double);
    double FinanceChargeCalc(double);
    double monthEndBalanceCalc(double, double);
} balance;

double MonthEndBalance::NewBalanceCalc(double prevousBalance, double payments, double charges) {
    double newBalance;

    newBalance = prevousBalance - payments + charges;

    return newBalance;
}

double MonthEndBalance::FinanceChargeCalc(double newBalance) {
    const double TAX = .12;
    double financeCharge;

    financeCharge = newBalance * TAX;

    return financeCharge;
}

double MonthEndBalance::monthEndBalanceCalc(double newBalance, double financeCharge) {
    double monthEndBalance;

    monthEndBalance = newBalance + financeCharge;

    return monthEndBalance;
}