Undefined Symbol in inherited classes for member Functions C++ - c++

Question

So I'm writing a Manager class which inherits from SalariedEmployee which inherits from Employee. I have the employee.h header file and employee.cpp header file and also for salariedemployee as shown below.
I cant seem to understand why I get the following errors when I try to compile the code of
Undefined symbol: employeessavitch::SalariedEmployee::SalariedEmployee()
Undefined symbol: employeessavitch::SalariedEmployee::SalariedEmployee()
Undefined symbol: employeessavitch::SalariedEmployee::get_salary() const
Undefined symbol: employeessavitch::Employee::get_ssn() const
Undefined symbol: employeessavitch::Employee::get_name() const
Here are my files
employee.h
#ifndef employee_h
#define employee_h
#include <string>
#include "employee.h"
using namespace std;
namespace employeessavitch
{
class Employee
{
public:
Employee();
Employee(string the_name, string the_ssn);
string get_name( ) const;
string get_ssn( ) const;
double get_net_pay( ) const;
void set_name(string new_name);
void set_ssn(string new_ssn);
void set_net_pay(double new_net_pay);
void print_check( ) const;
protected:
string name;
string ssn;
double net_pay;
};
}
#endif /* employee_h */
employee.cpp
#include <string>
#include <cstring>
#include <stdio.h>
#include <cstdlib>
#include <iostream>
#include "employee.h"
using namespace std;
namespace employeessavitch
{
Employee::Employee(): name("No name yet"), ssn("No number yet"), net_pay(0)
{
//deliberately empty
}
Employee::Employee(string the_name, string the_ssn)
{
//deliberately empty
}
Employee::Employee(string the_name, string the_number): name(the_name), ssn(the_number), net_pay(0)
{
//deliberately empty
}
string Employee::get_name() const
{
return name;
}
string Employee::get_ssn() const
{
return ssn;
}
double Employee::get_net_pay() const
{
return net_pay;
}
void Employee::set_name(string new_name)
{
name = new_name;
}
void Employee::set_ssn(string new_ssn)
{
ssn = new_ssn;
}
void Employee::set_net_pay (double new_net_pay)
{
net_pay = new_net_pay;
}
void Employee::print_check( ) const
{
cout << "\nERROR: print_check FUNCTION CALLED FOR AN \n"
<< "UNDIFFERENTIATED EMPLOYEE. Aborting the program.\n"
<< "Check with the author of the program about this bug.\n";
exit(1);
}
}//employeessavitch
salariedemployee.h
#ifndef salariedemployee_h
#define salariedemployee_h
#include <string>
#include "employee.h"
#include "salariedemployee.h"
namespace employeessavitch
{
class SalariedEmployee : public Employee
{
public:
SalariedEmployee();
SalariedEmployee (string the_name, string the_ssn, double the_weekly_salary);
double get_salary() const;
void set_salary(double new_salary);
void print_check();
protected:
double salary;//weekly
};
}//employeessavitch
#endif /* salariedemployee_h */
salariedemployee.cpp
#include <iostream>
#include <string>
#include <stdio.h>
#include "salariedemployee.h"
using namespace std;
namespace employeessavitch
{
SalariedEmployee::SalariedEmployee() //: Employee(), salary(0)
{
//deliberately empty
}
SalariedEmployee::SalariedEmployee(string the_name, string the_number, double the_weekly_salary)//: Employee(the_name, the_number), salary(the_weekly_salary)
{
//deliberately empty
}
double SalariedEmployee::get_salary() const
{
return salary;
}
void SalariedEmployee::set_salary(double new_salary)
{
salary = new_salary;
}
void SalariedEmployee::print_check()
{
set_net_pay(salary);
cout << "\n__________________________________________________\n";
cout << "Pay to the order of " << get_name( ) << endl;
cout << "The sum of " << get_net_pay( ) << " Dollars\n";
cout << "_________________________________________________\n";
cout << "Check Stub NOT NEGOTIABLE \n";
void SalariedEmployee::print_check()
{
set_net_pay(salary);
cout << "\n__________________________________________________\n";
cout << "Pay to the order of " << get_name( ) << endl;
cout << "The sum of " << get_net_pay( ) << " Dollars\n";
cout << "_________________________________________________\n";
cout << "Check Stub NOT NEGOTIABLE \n";
cout << "Employee Number: " << get_ssn( ) << endl;
cout << "Salaried Employee. Regular Pay: "
<< salary << endl;
cout << "_________________________________________________\n";
}
}//employeessavitch
main.cpp
#include <iostream>
#include <cstring>
#include <string>
#include <string.h>
#include <fstream>
#include "salariedemployee.h"
#include "employee.h"
using namespace std;
namespace employeessavitch
{
class Manager: public SalariedEmployee
{
public:
Manager();
~Manager();
void addReport(SalariedEmployee employee);
friend ostream& operator <<(ostream &outs, Manager manager);
private:
SalariedEmployee *reports;
int noReport;
};
Manager::Manager()
{
noReport = 0;
}
Manager::~Manager()
{
delete[] reports;
}
void Manager::addReport(SalariedEmployee employee)
{
SalariedEmployee *report = new SalariedEmployee[noReport+1];
for(int i = 0; i < noReport; i++)
{
report[i] = reports[i];
}
report[noReport+1] = employee;
delete[] reports;
}
ostream& operator <<(ostream &outs, Manager manager)
{
for(int i = 0; i < manager.noReport; i++)
{
outs << manager.reports[i].get_name() << endl;
outs << manager.reports[i].get_ssn() << endl;
outs << manager.reports[i].get_salary() << endl;
}
return outs;
}
}
int main()
{
cout << "hello world";
return 0;
}