libstdc++-v3/testsuite/27_io/objects/char/9661-2_xin.cc

   1 // 2003-04-30  Petur Runolfsson <peturr02@ru.is>
   2
   3 // Copyright (C) 2003-2024 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 #include <testsuite_hooks.h>
  21 #include <cstdio>
  22 #include <iostream>
  23
  24 void test02()
  25 {
  26   using namespace std;
  27
  28   int c1 = fgetc(stdin);
  29   int c2 = cin.rdbuf()->sputbackc(c1);
  30   VERIFY( c2 == c1 );
  31
  32   int c3 = fgetc(stdin);
  33   VERIFY( c3 == c1 );
  34   ungetc(c3, stdin);
  35
  36   int c4 = cin.rdbuf()->sgetc();
  37   VERIFY( c4 == c3 );
  38 }
  39
  40 int main()
  41 {
  42   test02();
  43   return 0;
  44 }