//
// This is example code from Chapter 10.6 "I/O error handling" of
// "Programming -- Principles and Practice Using C++" by Bjarne Stroustrup
//

#include "std_lib_facilities.h"

//------------------------------------------------------------------------------

void fill_vector(istream& ist, vector<int>& v, char terminator)
// read integers from ist into v until we reach eof() or terminator
{
   for (int i; ist >> i;) v.push_back(i);
   if (ist.eof()) return;    // fine: we found the end of file

   // not good() and not bad() and not eof(), ist must be fail()
   ist.clear();              // clear stream state
   char c;
   ist>>c;                   // read a character, hopefully terminator

   if (c != terminator) {    // ouch: not the terminator, so we must fail
      ist.unget();          // maybe my caller can use that character
      ist.clear(ios_base::failbit); // set the state to fail()
   }
}

//------------------------------------------------------------------------------

int main()
   try
      {
         // make cin throw if it goes bad:
         cin.exceptions(cin.exceptions()|ios_base::badbit);

         vector<int> v;
         fill_vector(cin, v, '*');
      }
   catch (exception& e) {
      cerr << "error: " << e.what() << '\n'; 
      return 1;
   }
   catch (...) {
      cerr << "Oops: unknown exception!\n"; 
      return 2;
   }

//------------------------------------------------------------------------------