Question

could any one tell me about some practical examples on using string streams in c++, i.e. inputing and outputing to a string stream using stream insertion and stream extraction operators?

Answer 1

You can use string streams to convert anything that implements operator << to a string:

#include <sstream>

template<typename T>
std::string toString(const T& t)
{
  std::ostringstream stream;
  stream << t;

  return stream.str();
}

or even

template <typename U, typename T>
U convert(const T& t)
{
  std::stringstream stream;
  stream << t;

  U u;
  stream >> u;

  return u;
}