C++ templates

[Tassos Souris]

hi..

i am learning C++ and i made a complex<T> class.
I made a copy constructor from complex<T2> to complex<T1>,

I have also made a:
template< class T > operator+(const complex<T>& a, const complex<T>& b)

if a write:

complex<float> f;
complex<double> d;
 
f + d;

i get an error... even though i have an copy constructor... shouldn't it use the copy constructor on d?


I have also made a copy assignment for a different type T:

template< class T2> complex& operator=(const complex<T2>& c){
       if (this != &c){ <<---- HERE I GET THE ERROR
          .... 
        }
 
        return *this;
}

clearly this is not a correct pointer to c.. how should i in general implement such copy assignment functions?