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[WindScar]

The code explain it:

templace <class T>

class V2d { public: T x,y; }


int main()

{

  V2d<int> i(3,3);

  V2d<double> d(V2d<double>(i));

}

How to make the statement "V2d<double>(i)" at the 7th line work (to convert a V2d<int> object in an V2d<double> object)?

[Reedbeta]

template <class T>
class V2d
{
public:
    T x, y;
    V2d(T x_, T y_): x(x_), y(y_) {}

    template <class U>
    V2d(const V2d<U> & v): x(v.x), y(v.y) {}
};