#include <iostream>
#include <fstream>

using namespace std;

int main() {
  {
    ofstream full("/dev/full");
    full << "wibble" << endl;
    cout << "after write to /dev/full:\n"
         << "  fail: " << full.fail() << '\n'
         << "  bad: " << full.bad() << '\n'
         << "  eof: " << full.eof() << '\n'
         << "  good: " << full.good() << '\n';
  }

  {
    int i;
    ifstream empty("/dev/null");
    empty >> i;
    cout << "after integer read from /dev/null:\n"
         << "  fail: " << empty.fail() << '\n'
         << "  bad: " << empty.bad() << '\n'
         << "  eof: " << empty.eof() << '\n'
         << "  good: " << empty.good() << '\n';
  }

  {
    string s;
    ifstream empty("/dev/null");
    getline(empty, s);
    cout << "after getline from /dev/null:\n"
         << "  fail: " << empty.fail() << '\n'
         << "  bad: " << empty.bad() << '\n'
         << "  eof: " << empty.eof() << '\n'
         << "  good: " << empty.good() << '\n';
  }

  {
    int i;
    ifstream zero("/dev/zero");
    zero >> i;
    cout << "after integer read from /dev/zero:\n"
         << "  fail: " << zero.fail() << '\n'
         << "  bad: " << zero.bad() << '\n'
         << "  eof: " << zero.eof() << '\n'
         << "  good: " << zero.good() << '\n';
  }

  {
    int i;
    close(0);
    cin >> i;
    cout << "after integer read from a bad FD:\n"
         << "  fail: " << cin.fail() << '\n'
         << "  bad: " << cin.bad() << '\n'
         << "  eof: " << cin.eof() << '\n'
         << "  good: " << cin.good() << '\n';
  }

  return 0;
}