I am getting a Linker error: undefined reference in my program. need help.

[jeffjnsb]

I am writing a Savings account program using a class with methods but it won't compile. I can't seem to figure out why.

Hhere is my program. It contains an header file, source code file, and a program cpp file:

Here is part of the error I get,

C:\Users\JEFF~1.JEF\AppData\Local\Temp\ccWScaaa.o(.text+0x17a) In function main': [Linker error] undefined reference toSavingsAccount::SavingsAccount(double)'
......

any help or pointers would be appreciated.

--------------------------
(Header File):

//Header file
#ifndef FILENAME_H
#define FILENAME_H

class SavingsAccount 
{

public:
SavingsAccount(double a);
~SavingsAccount();
static double modifyInterestRate(double b);
double calculateMonthlyInterest();
void printBalance();

private:

static double annInterestRate;
double saBalance;

};

#endif
//end 

(SavingsAccount .ccp):



#include <iostream>
#include "SavingsAccount.h"
using namespace std;


SavingsAccount::SavingsAccount(double a)
{
saBalance = a;        
annInterestRate = 0;
} 

SavingsAccount::~SavingsAccount()
{                                                           
}

double SavingsAccount::modifyInterestRate(double b)
{
   annInterestRate = b;    
}

double SavingsAccount::calculateMonthlyInterest()
{
  double interest = saBalance * annInterestRate;
  saBalance = saBalance + interest;    
}


void SavingsAccount::printBalance()
{
cout << saBalance << endl;   
}


double SavingsAccount::annInterestRate;


//end of Class Definition


(Program Driver cpp)


using namespace std;

#include <iostream> 
#include <iomanip> 
#include "SavingsAccount.h"

// Driver program below


int main()
{
   SavingsAccount saver1( 2000.0 );
   SavingsAccount saver2( 3000.0 );

   SavingsAccount::modifyInterestRate( .03 ); // change interest rate

   cout << "Initial balances:\nSaver 1: ";
   saver1.printBalance();
   cout << "\tSaver 2: ";
   saver2.printBalance();

   saver1.calculateMonthlyInterest();
   saver2.calculateMonthlyInterest();

   cout << "\n\nBalances after 1 month's interest applied at .03:\n"
      << "Saver 1: ";
   saver1.printBalance();
   cout << "\tSaver 2: ";
   saver2.printBalance();

   SavingsAccount::modifyInterestRate( .04 ); // change interest rate
   saver1.calculateMonthlyInterest();
   saver2.calculateMonthlyInterest();

   cout << "\n\nBalances after 1 month's interest applied at .04:\n"
      << "Saver 1: ";
   saver1.printBalance();
   cout << "\tSaver 2: ";
   saver2.printBalance();
   cout << endl;


   system("pause");
   return 0;
} 
//end of main

----------

~Jeff

[strmstn]

It would be easier to go through your code if it had CODE-tags.

Anyway, I couldn't see what the problem was unless you are trying to compile the :S - smiles.
So I tried changing the smiles into just :S and it compiled fine. It could be that some file isn't included in your project or similar.

[Software guy]

I use to have this kinda problem with VC, so try cleaning the project, You have an option of clean build try clicking that, it should work.

[jeffjnsb]

setted up the project folder again, It worked! Thanks! :S