#include <iostream>
#include <iomanip>
using namespace std;

class Loan
{
private:
    double total(int i);
    double principal;
    double interestRate;
    double Balance(int i);
    double Instalment ();
    double Interest (int i);
    int numPayments;

public:
    Loan (double amount, double interestRate, int numPayments);

    void displaySchedule(double amount, double interestRate, int numPayments);

};

void readData(double& principal, double& interestRate, int& numPayments)
{

cout <<"Principal: ";
cin >>principal;

cout <<"Interest rate: ";
cin >>interestRate;

cout <<"Number of payments: ";
cin >>numPayments;

cout <<endl;

}

Loan::Loan(double p, double ir, int np)
{
    principal = p;
    interestRate= ir;
    numPayments= np;
}

double Loan::Instalment()
{
    return principal / numPayments;
}

 double Loan::total(int i)
{
    return Instalment() + Interest(i);
}

double Loan::Balance(int i)
{
    return principal - (i-1) * Instalment();

}

double Loan::Interest(int i)
{
   return Balance(i) * (interestRate/12) / 100;

}

void Loan::displaySchedule(double amount, double interestRate, int numPayments)
{
        cout.setf(ios::fixed);
        cout.precision(2);
        cout.setf(ios::showpoint);

   cout << "No."<<setw(15)<<"Balance"<<setw(15)<<"Instalment"<<setw(15)<<"Interest"<<setw(15)<<"Total payment" << endl;
   cout << "----------------------------------------------------------------"<<endl;


   for (int i=1; i<=numPayments; i++)
   {
       cout <<i<<setw(15)<< Balance(i)<<setw(15)<<Instalment()<<setw(15)<<Interest(i)<<setw(15)<<total(i)<<endl;
   }


    cout <<"----------------------------------------------------------------"<<endl;



double total_instalment;
double total_interest;


    for (int i=1; i <=numPayments; i++)
    {

       total_instalment += Instalment();

       total_interest += Interest(i);
    }
    cout <<setw(33q)<<total_instalment <<setw(15)<< total_interest;
}

int main()
{
    double principle, interestRate;
    int numPayments;

    readData(principle, interestRate, numPayments);
    Loan myLoan(principle, interestRate, numPayments);
    myLoan.displaySchedule(principle, interestRate, numPayments);

    return 0;
}
/*
afborgun = höfuðstóll / fjöldi afborgana
instalment = principal / number of payments

vaxtaupphæð = eftirstöðvar höfuðstóls * (vaxtaprósenta/12) / 100
interest = remainder of principal * (interest rate/12) / 100

eftirstöðvar höfuðstóls við greiðslu nr. x = höfuðstóll - (x-1)*afborgun
balance = principal - (x-1) * instalment */