// stold example
#include <iostream>   // std::cout
#include <string>     // std::string, std::stod

int main ()
{
  std::string orbits ("90613.305 365.24");
  std::string::size_type sz;     // alias of size_t

  long double pluto = std::stoi (orbits,&sz);
  long double earth = std::stoi (orbits.substr(sz));
  std::cout << "Pluto takes " << (pluto/earth) << " years to complete an orbit.\n";
  return 0;
}