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Groups > comp.lang.c++ > #118579

fstreams

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  This (barring typos) is from a book by Bjarne:

int main()
{
  string from, to;    /* get source and target file names */
  cin >> from >> to;

  ifstream is( from.c_str() ); /* open input stream */
  ofstream os( to.c_str() );   /* open output stream */

  istream_iterator<string> ii(is); /* make input iterator for stream */
  istream_iterator<string> eos;    /* input sentinel */
  ostream_iterator<string> oo(os,"\n"); /* make out it. for stream */

  set<string> b(ii, eos);  /* b is a set initialized from input */
  copy(b.begin(), b.end(), oo);  /* copy buffer to output */ }

  So, is this good style not checking the stream states after opening?

  IIRC, out of the box those streams will not throw an exception
  when they cannot open.

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