#include <algorithm>
#include <iostream>
#include <string>
#include <vector>

struct Person
{
  std::string name;
  int born;
  int died;
};

struct Person2
{
  std::string name;
  int age;
	
  Person2(Person p = {})
  : name(p.name)
  , age(p.died-p.born)
  {
  }
};

int main()
{
  auto persons = std::vector<Person> 
  {
    { "Galilei", 1564, 1642 },
    { "Newton" , 1642, 1726 },
    { "Hawking", 1942, 2018 },
  };
	
  for (auto [name, born, died] : persons)
  {
    std::cout << name << '\t' << born << '-' << died  << '\n';
  }
  std::cout << "-----------------\n";
	
  auto persons2 = std::vector<Person2>(2);

  std::ranges::partial_sort_copy(persons, persons2, {}, &Person::name, &Person2::name);	

  for (auto [name, age] : persons2)
  {
    std::cout << name << '\t' << age  << '\n';
  }
}

/*
Galilei 1564-1642
Newton  1642-1726
Hawking 1942-2018
-----------------
Galilei 78
Hawking 76
*/