7.50.cpp

#include <string>
#include <iostream>

class Person {
  friend std::istream &read(std::istream &, Person &);
  //friend std::ostream &print(std::ostream &, const Person &);
public:
  Person() = default;
  explicit Person(const std::string &n) : name(n) {}
  Person(const std::string &n, const std::string &a)
      : name(n), address(a) {}
  explicit Person(std::istream &);

  std::string getName() const { return name; }
  std::string getAddress() const { return address; }

private:
  std::string name;
  std::string address;
};

std::istream &read(std::istream &is, Person &rhs) {
  is >> rhs.name >> rhs.address;
  return is;
}

std::ostream &print(std::ostream &os, const Person &rhs) {
  os << rhs.getName() << " " << rhs.getAddress();
  return os;
}

Person::Person(std::istream &is) {
  read(is, *this);
}

int main() {
  Person p;
  read(std::cin, p);
  print(std::cout, p);

  return 0;
}