class initialization with another class AND adding constant chars to class with overloading + operator

Question

class myString {
public:
    myString(int number) {}
    myString(myString& paramMyString) {}
    myString(myString&& paramMyString) {}
    friend myString operator+(const char stString, myString& ndString);
    friend myString operator+(myString& stString, const char* ndString);
    friend myString operator+(myString& stString, myString& ndString);
    myString& operator=(myString& rhs)
    {
        return *this;
    }
    myString& operator=(myString&& rhs)
    {
        return *this;
    }
};
myString operator+(const char* stString, myString& ndString)
{
    myString rr(0);
    return rr;
}
myString operator+(myString& stString, const char* ndString)
{
    myString rr(0);
    return rr;
}
myString operator+(myString& stString, myString& ndString)
{
    myString rr(0);
    return rr;
}

Above is example of class. Then I would like to add string to it or initialize this class with same class like below:

myString kk();
        myString pp = kk;
        myString pp = "sth"+kk;

In second line just above I am getting error that cannot convert from myString to myString but
I made both copying constructor and moving constructor so I don't understand why it is not letting
me initialize myString with myString. How to this?

I would like like also add "sth" to myString. I made overloading operators so I should have not any error.
What is going wrong here?

Answer 1

Kk is currently a function.

Try this fix: ‘myString kk;’ and add the parameterless constructor. Or maybe write ‘myString kk(0);’.