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error

ChungTong (20)
I created different style of program this time, but they give me error::/tmp/cczAJxFX.o: In function `main':
:(.text.startup+0x41): undefined reference to `Loan::getMonthlyPayment(double, int, double)'
:(.text.startup+0x5e): undefined reference to `Loan::getTotalPayment(double, int, double)'
collect2: error: ld returned 1 exit status
can someone teach me how to fix it directly?? Thank you

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

class Loan
{
public:
  Loan();
  Loan(double newAnnualInterestRate, int newNumberOfYears, double newLoanAmount);
  double getAnnualInterestRate() const;
  int getNumberOfYears() const;
  double getLoanAmount() const;
  void setAnnualInterestRate(double newAnnualInterestRate);
  void setNumberOfYears(int newNumberOfYears);
  void setLoanAmount(double newLoanAmount);
  double getMonthlyPayment() const;
  double getTotalPayment() const;
  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;
};

Loan::Loan()
{
  annualInterestRate = 5.5;
  numberOfYears = 15;
  loanAmount = 40000;
}

Loan::Loan(double newAnnualInterestRate, int newNumberOfYears, double newLoanAmount) 
{
  annualInterestRate = newAnnualInterestRate;
  numberOfYears = newNumberOfYears;
  loanAmount = newLoanAmount;
}

double Loan::getAnnualInterestRate() const
{
  return annualInterestRate;
}

int Loan::getNumberOfYears() const
{
  return numberOfYears;
}

double Loan::getLoanAmount() const
{
  return loanAmount;
}

void Loan::setAnnualInterestRate(double newAnnualInterestRate)
{
  annualInterestRate = newAnnualInterestRate;
}

void Loan::setNumberOfYears(int newNumberOfYears)
{
  numberOfYears = newNumberOfYears;
}

void Loan::setLoanAmount(double newLoanAmount)
{
  loanAmount = newLoanAmount;
}

double Loan::getMonthlyPayment() const
{
  double monthlyInterestRate = annualInterestRate / 1200;
    return loanAmount * monthlyInterestRate / (1 - (pow(1 / (1 + monthlyInterestRate), numberOfYears * 12)));
}
double Loan::getTotalPayment() const
{
    double monthlyInterestRate=annualInterestRate/1200;
    return (loanAmount * monthlyInterestRate / (1 - (pow(1 / (1 + monthlyInterestRate), numberOfYears * 12)))*180);
}
int main(){
Loan newLoan;
newLoan.getMonthlyPayment(5.5, 15, 40000);
newLoan.getTotalPayment(5.5, 15, 40000);
cout<<" your monthly payment is "<<newLoan.getMonthlyPayment()<<".";
cout<< "Your total payment is"<< newLoan.getTotalPayment()<<endl;
}
Last edited on
keskiverto (10402)
A linker error.

Your program does not contain implementation for the member functions that you do declare on lines 18-19.
ChungTong (20)
hello can you give me some clue or example how to fix link error ?? Thank You!!
Last edited on
keskiverto (10402)
Write the missing functions that the error mentions.
ChungTong (20)
but i already included the formula inside my class declaretion , should i wrtie another one?? Thank you
jlb (4973)
Do the type and number of parameters match? I don't see where you implemented a member function with the following signature: Loan::getTotalPayment(double, int, double) I only see the double Loan::getTotalPayment() const function.

keskiverto (10402)
but i already included the formula inside my class declaretion

On what lines of your code is that formula?
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