#include <functional>
#include <algorithm>
#include <iostream>
#include <string>

void add(std::string& ziel, std::string quelle)
{
  ziel += quelle;
}

int main()
{
  auto woerter = { "super", "cali", "fragi", "listisch" };

  std::string s;
  auto f = std::bind(add, std::ref(s), std::placeholders::_1); 
  std::for_each(begin(woerter), end(woerter), f);
  std::cout << s << '\n';
}