#include<iostream>

using namespace std;

class wektor
{
public:
    double x,y,z;
};

ostream &operator<<(ostream &out, wektor w)
{
    out << w.x << ", " << w.y << ", " << w.z;
    return out;
}

istream &operator>>(istream &in, wektor &w)
{
    char znak;
    in >> w.x >> znak >>  w.y >> znak >> w.z;
    return in;
}
int main()
{
    wektor u,w;

    cout << "Wpisz wektor u: ";
    cin >> u;
    cout << "Wpisz wektor w: ";
    cin >> w;
    cout << "Wektor u = (" << u << ")" << endl;
    cout << "Wektor w = (" << w << ")" << endl;
}