C/C++ :: Undefined Class Member Even Though It Is Defined?

I made this code (it does nothing I am just learning about classes, I was learning about friend functions) and I don't understand what is wrong, here is the code:

#include <iostream>
#include <cstdlib>
#include <cstring>
using namespace std;
class MyClass {
public:
friend int add(int a, int B)/>;
[Code] ....

I know i didn't need to include cstdlib and cstring for this code but as I said, it's not supposed to be something it's just for practice and I was working on char arrays. My question is about the part where i try to define the function:

int MyClass::add(int a, int B)/>
{}

My compiler(Microsoft Visual C++ 2010 Express) says that class MyClass has no member "add" even though it does...