How to print a list with spaces inserted inbetween without worrying about adding extra spaces at the end or checking for a one time condition for all iterations

print-head-tail.cpp

#include <iostream>
#include <functional>

int main(int argc, char *argv[])
{
  auto printHead = [] (int num)
    {
      std::cout << num;
    };

  auto printTail = [] (int num)
    {
      std::cout << ' ' << num;
    };

  // Need explicit type for lambda if its going to be captured
  std::function<void(int)> print = [&printHead, &printTail, &print] (int num)
    {
      printHead(num);
      print = printTail;
    };

  for (auto& element : {1,2,3,4,5,6,6,7,8,9,6})
  {
    print(element);
  }

  return 0;
}