Unresolved external symbol error

1>wk11.obj : error LNK2019: unresolved external symbol "public: void __thiscall Employee::sethours(int)" (?sethours@Employee@@QAEXH@Z) referenced in function "public: void __thiscall Employee::retrievehours(void)" (?retrievehours@Employee@@QAEXXZ)
1>wk11.obj : error LNK2019: unresolved external symbol "public: void __thiscall Employee::setwadges(int)" (?setwadges@Employee@@QAEXH@Z) referenced in function "public: void __thiscall Employee::retrievewadges(void)" (?retrievewadges@Employee@@QAEXXZ)
1>C:\Users\edith\documents\visual studio 2010\Projects\wk11\Debug\wk11.exe : fatal error LNK1120: 2 unresolved externals

#include <iostream>
#include <string>
using namespace std;
class Employee {
private: 
	
	string firstName;
	string lastName;
	int hours;
	int numhours;//removed
	int wadges;
	int twadges;//removed
	int rate;//removed
public:
	// First Name
	string getFirstName() { return firstName; }
	void setFirstName(string name) { firstName = name; }
	void retrieveFirstName() {
		string temp;
		cout << "First Name: ";
		cin >> temp;
		setFirstName(temp);
	}
	// Last Name
	string getLastName() { return lastName;	}
	void setLastName(string name) {	lastName = name; }
	void retrieveLastName() {
		string temp;
		cout << "Last Name: ";
		cin >> temp;
		setLastName(temp);
	}
	// hours
	int gethours() { return hours; }
	void sethours(int hours) {
	void retrievehours() {
	cout << "How many hours? ";
	int temp;
	cin >> temp;
	sethours(temp);
	}
	// wadges
	int getwadges() {return twadges; }
	void setwadges(int wadges) {
	void retrievewadges() {
	cout << "What is your hourly wadge? " ;
	int tempwadges;
	cin >> tempwadges;
	setwadges(tempwadges);
	
	}
		void retrieve() {
		retrieveFirstName();
		retrieveLastName();
		retrievehours();
		retrievewadges();
		
	}
		int grosspay(){
		int total;
		total = twadges * numhours;	
		cout << total;
		}
		return total;
}
};
int main()
	Employee name;
	name.retrieve();
	cout << "Grosspay " << name.grosspay() << endl;
	system("pause");
	return 0;
}