MP (examples of all usefull stuff)

// zaprzyjaznienie operatora << w class
friend ostream & operator << (ostream &, const adres &); // zaprzyjazniony operator
};
ostream & operator << (ostream & out, const adres & r){
  return out << r.m << " " << r.u << " " << r.kp << " " << r.nr << endl;
}
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