Thread: C++ error C2011

Hi, Im working with making my first class and I have everything set up but when i try to build, i get the apparently "famous" c2011 error. I've tried different methods of solving this problem after searching online, but nothing worked.
Here is my code
This code creates the gradebook object

Code:

// 

#include "stdafx.h"
#include <iostream> 
#include "gradebook.h" //this is the header file for my class

using namespace std;



int main()
{
	
	Gradebook mygradebook ("CS 101") ; // 

}

This is my header file.

Code:

#include "stdafx.h"
#include <iostream>

#include <string>

using namespace std;

class Gradebook {
public:
	Gradebook (string name);
	void Setname(string name);
	string Getname();
	void DisplayMessage( );
private :
	string Coursename ; };

This is my .cpp file, for the header,

Code:

#include "stdafx.h"
#include "gradebook.h"
#include <string>





	using namespace std;
class Gradebook {
public:
	Gradebook::Gradebook (string name){  //constructor statement
	Setname(name);
	}
	void Gradebook::Setname(string name) {   // Mutator method
		Coursename = name;
	}
	string Gradebook::Getname() {
	return Coursename ;
	}
	
	void Gradebook::DisplayMessage( ){ //display message statement
	cout << "Welcome To The Gradebook For " << Getname() << endl ; 
	}

private: 
	string Coursename ;
};

The error i get is

Code:

gradebook.cpp(11) error C2011: 'Gradebook' : 'class' type redefinition
          gradebook.h(8) : see declaration of 'Gradebook'

I've tried using the #indef, endif, method but i wasnt exactly sure how to use that and it didnt work out Can someone help me out here???