Compiler error c2228

I've been working on this little project for a while now. Everytime I get close to completing it, something goes wrong. Can someone please tell me what this error means:


error C2228: left of '.calculatePay' must have class/struct/union

Here is the code. Thanks

Code:

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




const double _payRate = 3.75;

class Employee
{
private:
	int    _empId;		// Employee Id.

//	double	_hoursWorked;	// Hours Worked.

public:
	Employee( );			// Constructor.
	Employee( int empId );		// Overloaded Constructor.
	double calculatePay( /*int*/ double hoursWorked );	// Calculates the Employees pay.
	double salary;
	void setEmpId( int empId );		// Mutator Method - allows you to set the employee id.
	int  getEmpId( );			// Accessor Method - allows you to get the employee id. 
	void setSalaried();			//
	bool getSalaried();			//
};

// Constructor.
Employee::Employee()
{
	this->_empId = 1;
	//this->_payRate = 5.33;
	
//	this->_hoursWorked = 10.0;
}

Employee::Employee( int empId  )
{
	this->_empId = empId;
	//this->_payRate = payRate;
	
}

// Calculates the Employee's pay based upon the _payRate and _hoursWorked.
double Employee::calculatePay( /*int*/ double hoursWorked ) 
{
	return _payRate * hoursWorked;
}

// Sets the Employee Id
void Employee::setEmpId( int empId )
{
	this->_empId = empId;
}

// Gets the employee id.
int Employee::getEmpId( )
{
	return this->_empId;
}


// Main C++ function.
int _tmain(int argc, _TCHAR* argv[])
{
	
	double emp1Pay = 0.0;	
	double emp2Pay = 0.0;
	double emp3Pay = 0.0;
	double totalPay = 0.0;	

	Employee emp1( 1);
	Employee emp2( 2 );
	Employee emp3( 3 );


	double emp1Hours, emp2Hours, emp3Hours;
	
	cout << "Please type number of hours for first employee\t: ";
	cin >>  emp1Hours;
	cout<<  _payRate * emp1Hours<<endl; 
	
	cout<< "Please type number of hours for second employee\t: ";
	cin>> emp2Hours;
	cout<< _payRate * emp2Hours<<endl;

	cout<<"Please type number of hours for third employee\t: ";
	cin>>emp3Hours;
	cout<<_payRate * emp3Hours<<endl;


	

	//cout << "Employee " << emp.getEmpId( ) << "'s salary is : " << emp.calculatePay( 40 );

	
	emp1Pay = emp.calculatePay( emp1Hours );
	totalPay += emp1Pay;
	
	emp2Pay = emp.calculatePay( emp2Hours );
	totalPay += emp2Pay;

	emp3Pay = emp.calculatePay( emp3Hours );
	totalPay += emp3Pay;

	cout << endl << "Employee ID" << setw(15) << "Pay" << endl;
	cout << "----------------------------" << endl;
	cout << emp1.getEmpId( )  << setw(27) << setiosflags( ios::right ) << fixed << setprecision( 2 ) << emp1Pay << setiosflags( ios::left ) << endl;
	cout << emp2.getEmpId( ) << setw(27) << setiosflags( ios::right ) << fixed << setprecision( 2 ) << emp2Pay << setiosflags( ios::left ) << endl;
	cout << emp3.getEmpId( ) << setw(27) << setiosflags( ios::right ) << fixed << setprecision( 2 ) << emp3Pay << setiosflags( ios::left ) << endl;
	cout << "----------------------------" << endl;
	cout << "Total" << setw(23) << setiosflags( ios::right ) << fixed << setprecision( 2 ) << totalPay << setiosflags( ios::left ) << endl;


	cout << endl << endl << "Please press a key and then press enter to quit." << endl;
	
	char a;
	cin >> a;

	return 0;
}

Code:

	emp1Pay = emp.calculatePay( emp1Hours );
	totalPay += emp1Pay;
	
	emp2Pay = emp.calculatePay( emp2Hours );
	totalPay += emp2Pay;

	emp3Pay = emp.calculatePay( emp3Hours );
	totalPay += emp3Pay;

What is emp?

emp1Pay = emp.calculatePay( emp1Hours );

emp has not been declared as an object of Employee type