Member functions of our class are defined by preceding the name of the function with the template keyword.
Consider the function we defined as Complex:: Complex (double re_a, double im_a).
We would rewrite this function as
template<class T>
Complex<T>:: Complex (T re_a, T im_a)
{ re = re_a; im = im_a; }
The member functions are otherwise defined following ordinary member function definitions.