Attempt to read from empty stream : istrstream « File Stream « C++ Tutorial

1. C++ Tutorial
2. File Stream
3. istrstream

#include <iostream>
using std::cout;
using std::endl;

#include <string>
using std::string;

#include <sstream>
using std::istringstream;

int main()
{
   string input( "" );
   istringstream inputString( input );

   // attempt to read from empty stream
   long value;
   inputString >> value;

   if ( inputString.good() )
      cout << "\n\nlong value is: " << value << endl;
   else
      cout << "\n\ninputString is empty" << endl;


   return 0;
}

inputString is empty