Need help implementing the C++ header file below!!

#ifndef _Employee_ #define _Employee_

#include #include #include

using namespace std;

class Employee {

public: Employee(int IdNum = 11111, std::string last = " lastname", std::string first = "firstname"); Employee(const Employee& person); ~Employee(); void setFirstName(string first); void setLastName(string last); void setID(int IdNum); int getID() const; std::string getFirstName() const; std::string getLastName() const;

friend std::istream& operator>>(std::istream& ins, Employee& person); private: int ID; string lastname; string firstname;

Employee();

};

std::ostream& operator<<(std::ostream& outs, const Employee& person); bool operator==(const Employee& p1, const Employee& p2); // test if two employees are the same. bool operator<(const Employee& p1, const Employee& p2); // test if one employee's last name is less than another employee's.

#endif