LInk errors

If anybody knows about these errors will you please help me with them? The errors I get are:

1>Week6iLab.obj : error LNK2001: unresolved external symbol "public: virtual double __thiscall Employee::wages(void)const " (?wages@Employee@@UBENXZ)

1>Week6iLab.obj : error LNK2001: unresolved external symbol "public: virtual void __thiscall Employee::print(void)const " (?print@Employee@@UBEXXZ)

1>C:\Users\nglwthnati2de\Documents\Visual Studio 2008\Projects\Week6iLab_RWilson\Debug\Week6iLab_RW ilson.exe : fatal error LNK1120: 2 unresolved externals

Now this code isn't completed yet. I just like to keep a handle on my stuff as I go along. Here is my code:

Code:

---

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

class Employee
{
public:
        Employee(const string &, const string &, const string &);

        void setFirstName(const string &);
        string getFirstName()const;

        void setLastName(const string &);
        string getLastName()const;

        void setEmployeeID(const string &);
        string getEmployeeID()const;

        virtual double wages()const;
        virtual void print()const;
private:
        string firstName;
        string lastName;
        string employeeID;
};

class Manager : public Employee
{
public:
        Manager(const string &, const string &, const string &, double = 0.0);

        void setWeeklySalary(double);
        double getWeeklySalary()const;

        virtual void print()const;
private:
        double weeklySalary;
};

class EntryLevelEmployee : public Employee
{
        EntryLevelEmployee(const string &, const string &, const string &, double = 0.0, double = 0.0);
       
        void setHourlyPay(double);
        double getHourlyPay()const;

        void setHours(double);
        double getHours()const;

        virtual double earnings()const;
        virtual void print()const;
private:
        double pay;
        double hours;
};

class SalesRep : public Employee
{
public:
        SalesRep(const string &, const string &, const string &, double = 0.0, double = 0.0);

        void setCommissionRate(double);
        double getCommissionRate()const;

        void setTotalSales(double);
        double getTotalSales()const;

        virtual double earnings()const;
        virtual void print()const;
private:
        double totalSales;
        double commissionRate;
};

class SalesManager : public SalesRep
{
public:
        SalesManager(const string &, const string &, const string &, double = 0.0, double = 0.0, double = 0.0);

        void setBaseSalary(double);
        double getBaseSalary()const;

        virtual double earnings()const;
        virtual void print()const;
private:
        double baseSalary;
};

//class definitions

Employee::Employee(const string &first, const string &last, const string &empID)
: firstName (first),  lastName(last), employeeID(empID)
{

}

int main()
{
        return 0;
}

---

That's a little bit surprising, since I wouldn't expect those functions to be needed unless they were called (and I don't see you calling anything yet). If you just put a dummy function (i.e., like you did with Employee::Employee, with nothing inside the curly braces) does that fix the problem?

Hmmm...not sure but I will try that out.
Thanks for the tip.

The virtual function definition is needed for vtable initialization. So better add a dummy definition to make compiler happy.


-Raj