#ifndef LOAN_H
#define LOAN_Hclass Loan{
public:Loan();Loan(double rate, int years, double amount);double getAnnualInterestRate();int getNumberOfYears();double getLoanAmount();void setAnnualInterestRate(double rate);void setNumberOfYesrs(int years);void setLoanAmount(double amount);double getMonthlyPayment();double getTotalPayment();static double getMonthlyPayment(double annualInterestRate,int numberOfYears, double loanAmount);static double getTotalPayment(double annualInterestRate,int numberOfYears, double loanAmount);private:double annualInterestRate;int numberOfYears;double loanAmount;
};#endif // loan.h

#include "loan.h"
#include <cmath>
using namespace std;Loan::Loan(){annualInterestRate = 9.5;numberOfYears = 30;loanAmount = 100000;
}Loan::Loan(double rate, int years, double amount){annualInterestRate = rate;numberOfYears = years;loanAmount = amount;
}double Loan::getAnnualInterestRate(){return annualInterestRate;
}int Loan::getNumberOfYears(){return numberOfYears;
}double Loan::getLoanAmount(){return loanAmount;
}void Loan::setAnnualInterestRate(double rate){annualInterestRate = rate;
}void Loan::setNumberOfYesrs(int years){numberOfYears = years;
}void Loan::setLoanAmount(double amount){loanAmount = amount;
}double Loan::getMonthlyPayment(){return getMonthlyPayment(annualInterestRate, numberOfYears, loanAmount);
}double Loan::getTotalPayment(){return getTotalPayment(annualInterestRate, numberOfYears, loanAmount);
}double Loan::getMonthlyPayment(double annualInterestRate,int numberOfYears, double loanAmount){double monthlyInterestRate = annualInterestRate / 1200;return loanAmount * monthlyInterestRate / (1 - (pow(1 / (1 + monthlyInterestRate), numberOfYears * 12)));
}double Loan::getTotalPayment(double annualInterestRate,int numberOfYears, double loanAmount){return getMonthlyPayment(annualInterestRate, numberOfYears,loanAmount) * numberOfYears * 12;}

#include <iostream>
#include "loan.h"
using namespace std;int main(){//Enter annual interest ratecout << "Enter yearly interest rate, for example 8.25: ";double annualInterestRate;cin >> annualInterestRate;//Enter number of yearscout << "Enter number of years as an integer, for example 5: ";int numberOfYears;cin >> numberOfYears;//Enter loan amountcout << "Enter loan amount, for example 120000.95: ";double loanAmount;cin >> loanAmount;Loan loan(annualInterestRate, numberOfYears, loanAmount);cout << "The monthly payment is: " << loan.getMonthlyPayment() << endl;cout << "The total payment is: " << loan.getTotalPayment() << endl;//use static menber function ex1cout << "The monthly payment is: " <<loan.getMonthlyPayment(annualInterestRate, numberOfYears, loanAmount) << endl;cout << "The total payment is: " <<loan.getTotalPayment(annualInterestRate, numberOfYears, loanAmount) << endl;//use static menber function ex2double rate = 8.25;int years = 10;double amount = 500000;cout << "The monthly payment is: " << Loan::getMonthlyPayment(rate, years, amount) << endl;cout << "The total payment is: " << Loan::getTotalPayment(rate, years, amount) << endl;return 0;
}