类外重载赋值运算符

我一直在尝试使用friend类在类外重载赋值运算符,但不管我做什么都不起作用。(是的,我知道惯例是重载类内的运算符)。这是我为使之工作所做的一个例子:

class Person{

public:

Person(string n){
     name = n;
}

friend class assignment;

name = "Joe";

}


}

class assignment{
public:
Person operator&(Person &rhs){
        Person test;
        test.name = rhs.name;
        return test;  //return *this doesn't work

        }
}

不管我做什么,赋值运算符都不会在main中运行/返回:

Person one("Joe")
person two("Martin");
person three("Anna")

two = three;

std::cout<<two.name; //does not equal the member variable of three;