что необходимо написать чтоб вывести v3 на экранinclude using namespace std;struct

include lt;iostreamgt;
include lt;sstreamgt;

using namespace std;
struct Vector3

int x, y, z;
Vector3()


Vector3(int x, int y, int z): x(x), y(y), z(z)

Vector3 operator + (Vector3 v1)

return Vector3(this-gt;x+v1.x,this-gt;y+v1.y,this-gt;z+v1.z);

std::string ToString()

std::stringstream s;
s lt;lt;"(" lt;lt; this-gt;x lt;lt; "," lt;lt; this-gt;y lt;lt;"," lt;lt; this-gt;z lt;lt; ")";
return s.str();

;

int main()

Vector3 v1(1, 2, 3);
Vector3 v2(4, 5 ,6);
Vector3 v3;


v3 = v1 + v2;

cout lt;lt; v3.ToString();