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

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

auto lifespan = [](Person p) { return p.died - p.born; };

void show(const std::vector<Person>& persons, std::string message)
{
  std::cout << '\n' << message << "\n\n";
  
  for (auto p : persons)
  {
    std::cout 
      << p.name << '\t' 
      << p.born << '-' 
      << p.died << ' ' 
      << lifespan(p) << '\n';
  }
}

int main()
{
  auto v = std::vector<Person> 
  {
    { "Galilei", 1564, 1642 },
    { "Newton" , 1642, 1726 },
    { "Hawking", 1942, 2018 },
  };
  
  namespace rg = std::ranges;

  rg::sort(v, {}, &Person::name);  
  show(v, "--- sorted by name:");  

  rg::sort(v, {}, &Person::born);  
  show(v, "--- sorted by year of birth:");

  rg::sort(v, rg::greater{}, lifespan);  
  show(v, "--- sorted by lifespan:");  
}