// http://www.cplusplus.com/reference/algorithm/next_permutation/
// next_permutation example
#include <iostream>
#include <algorithm>
using namespace std;

int main ()
{
  int myints[] = { 1, 2, 3, 4 };

  sort(myints, myints+4);

  cout << "The 4! possible permutations with 4 elements:\n";
  do
  {
    for(auto it = begin(myints); it != end(myints); it++)
      cout << *it << ' ';
    cout << '\n';
  }
  while( next_permutation(myints, myints+4) );

  cout << "\nAfter loop:\n";
  for(auto it = begin(myints); it != end(myints); it++)
    cout << *it << ' ';
  cout << '\n';

  return 0;
} // main()