#include <algorithm>
#include <iostream>
#include <array>
 
using namespace std;
 
class Vertex
{
public:
    Vertex( float x = 0,
            float y = 0,
            float z = 0)
    : x(x), y(y), z(z) {}
 
	operator array<float, 3>() {
		return array<float, 3>({x,y,z});
	}
	void fillArray(float (& const  arr)[3]) {
		arr[0] = x;
		arr[1] = y;
		arr[2] = z;
	}
 
    float x, y, z;
};
 
int main() {
	Vertex v(1,1.4,2);
	array<float, 3> arr = v;
	float arr2[3];
	v.fillArray(arr2);
 
	for (int i = 0; i < 3; i++) {
		cout << arr[i] << " " << arr2[i] << endl;
	}
	return 0;
}

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