C / C++ / MFC

class A
{
    public:
        A &operator+=( const A &add_to );
};

A operator+( const A &a, const A &b )
{
    A temp( a );
    temp += b;
    return temp;
}

class B
{
    public:
        friend std::ostream &operator<<( std::ostream &str, const B &print_me );
        friend std::istream &operator>>( std::ostream &str, const B &load_me );
};

std::string to_upper( const std::string &source )
{
    std::string upper_case( source.size(), 0 );
    std::transform( begin( source ), end( source), begin( upper_case ), toupper );
    return upper_case;
}

std::string &to_upper_in_place( std::string &upper_case_me )
{
    std::string temp = to_upper( upper_case_me );
    std::swap( temp, upper_case_me );
    return upper_case_me;
}

Member 9052985 wrote:

Is there any chance