libstdc++-v3/testsuite/27_io/objects/char/12048-1.cc

   1 // Derived from libstdc++/12048 by LJR <ljrittle@acm.org> with
   2 // reminder from Petur Runolfsson <peturr02@ru.is>.
   3
   4 // Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008
   5 // Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 2, or (at your option)
  11 // any later version.
  12
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING.  If not, write to the Free
  20 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  21 // USA.
  22
  23 // { dg-require-fileio "" }
  24
  25 #include <iostream>
  26 #include <cstdio>
  27 #include <testsuite_hooks.h>
  28
  29 void
  30 test01()
  31 {
  32   std::freopen("cin_unget-1.txt", "r", stdin);
  33
  34   char c1;
  35   char c2;
  36   std::cin.get(c1);
  37   std::cin.unget();
  38   std::cin.get(c2);
  39   VERIFY( std::cin.good() );
  40   VERIFY( c1 == c2 );
  41 }
  42
  43 int main(void)
  44 {
  45   test01();
  46   return 0;
  47 }