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, 2009
   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 3, 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 COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22 // { dg-require-fileio "" }
  23
  24 #include <iostream>
  25 #include <cstdio>
  26 #include <testsuite_hooks.h>
  27
  28 void
  29 test01()
  30 {
  31   VERIFY( std::freopen("cin_unget-1.txt", "r", stdin) );
  32
  33   char c1;
  34   char c2;
  35   std::cin.get(c1);
  36   std::cin.unget();
  37   std::cin.get(c2);
  38   VERIFY( std::cin.good() );
  39   VERIFY( c1 == c2 );
  40 }
  41
  42 int main(void)
  43 {
  44   test01();
  45   return 0;
  46 }