// ####################### stringstream.cpp

#include <iostream>
#include <sstream>

main ()
{
  int i = 5;
  stringstream ss;
  ss << "i= " << i;
  cout << ss.str () << "\n";

  stringstream sss ("10");
  sss >> i;
  cout << i * 2 << "\n";

  sss.str ("-10");
  sss >> i;
  cout << i * 2;
}