std::collate::hash

// collate::hash example
#include <iostream>       // std::cin, std::cout
#include <string>         // std::string, std::getline
#include <locale>         // std::locale, std::collate, std::use_facet
int main ()
{
  std::string myberry = "strawberry";
  std::string yourberry;
  std::locale loc;                 // the "C" locale
  const std::collate<char>& coll = std::use_facet<std::collate<char> >(loc);
  long myhash = coll.hash(myberry.data(),myberry.data()+myberry.length());
  std::cout << "Please, enter your favorite berry: ";
  std::getline (std::cin,yourberry);
  long yourhash = coll.hash(yourberry.data(),yourberry.data()+yourberry.length());
  if (myhash == yourhash)
    std::cout << "Mine too!\n";
  else
    std::cout << "I prefer strawberries...\n";
  return 0;
}