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#include <iostream>
#include <iomanip>
#include <fstream>
#include <cmath>
using namespace std;
//Reads the inputs principal amount, rate of interest, and number of payments.
void readInputs(double &presentValue, double &rateOfInterest, int &numOfPayments, double &tax_pm)
{
cout << "Enter the loan amount: ";
cin >> presentValue;
cout << "Enter the yearly rate of interest(as a percentage): ";
cin >> rateOfInterest;
rateOfInterest = (rateOfInterest / 100) / 12;
cout << "Enter the number of payments (in months): ";
cin >> numOfPayments;
cout << "What is the tax amount per year? $";
cin >> tax_pm;
tax_pm = tax_pm / 12;
}
//Calculates the EMI per payment, given the inputs.
void EMICalc(double presentValue, double rateOfInterest, int numOfPayments, double tax_pm, double &EMI)
{
EMI = (rateOfInterest * presentValue) / (1 - pow((1 + rateOfInterest), (-1 * numOfPayments)));
EMI = floor(EMI * 100 + 0.5) / 100;
EMI = EMI + tax_pm;
}
//Calcualtes the total amount of tax paid each year
void calculateTax(double tax, int numOfPayments)
{
double No_of_Payments_in_years = numOfPayments / 12;
double totalTax = tax * No_of_Payments_in_years;
double tax_pm = totalTax / numOfPayments;
}
void printTable(double pV, double roI, int noP, double emi, double tax_pm)
{
//For including thousand separator
locale system_locale("");
cout.imbue(system_locale);
cin.imbue(system_locale);
ofstream outFile;
//For including thousand separator
outFile.imbue(system_locale);
outFile.open("MortgageTablePgmV2_Results.txt");
outFile << "Principal\t$" << pV << "\t\tPayment\t$" << fixed << setprecision(2) << emi << endl;
outFile << "Annual Interest\t" << fixed << setprecision(2) << roI * 12 * 100 << "%\t\tTerm\t" << noP << " Months" << endl << endl;
//Printing table header with proper formatting
outFile << left << setw(16) << "Payment" << setw(16) << "Amount" << setw(16) << "Principal" << setw(16) << "Interest"
<< setw(16) << "Tax" << setw(10) << "Principal Balance" << endl;
double interest, principal;
double totemi = 0, totprin = 0, totint = 0, tottax = 0, totpV = 0;
for (int i = 0; i < noP; i++)
{
interest = pV * roI;
if (interest < 0)
{
interest = 0;
}
principal = (emi - interest) - tax_pm;
if (principal < 0)
{
principal = 0;
}
pV = pV - principal;
if (pV < 0)
{
pV = 0;
}
//Writing calculated values to file with required format
outFile << right << setw(7) << (i + 1);
outFile.precision(2);
outFile << right << setw(17) << fixed << "$" << emi;
outFile << right << setw(19) << fixed << "$" << principal;
outFile << right << setw(16) << fixed << "$" << interest;
outFile << right << setw(12) << fixed << "$" << tax_pm;
outFile << right << setw(22) << fixed << "$" << pV << endl;
totemi += emi;
totprin += principal;
totint += interest;
tottax += tax_pm;
totpV += pV;
}
outFile << right << setw(7) << "Totals";
outFile.precision(2);
outFile << right << setw(1) << fixed << "$" << totemi;
outFile << right << setw(19) << fixed << "$" << totprin;
outFile << right << setw(16) << fixed << "$" << totint;
outFile << right << setw(12) << fixed << "$" << tottax;
outFile << right << setw(22) << fixed << "$" << pV << endl;
}
int main()
{
double presentValue, rateOfInterest, EMI, tax, tax_pm;
int numOfPayments;
readInputs(presentValue, rateOfInterest, numOfPayments, tax_pm);
EMICalc(presentValue, rateOfInterest, numOfPayments, tax_pm, EMI);
calculateTax(tax_pm, numOfPayments);
printTable(presentValue, rateOfInterest, numOfPayments, EMI, tax_pm);
double totalInterest = EMI * numOfPayments - presentValue;
cout << "Total interest paid: " << totalInterest << endl;
return 0;
}
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