libstdc++-v3/testsuite/27_io/istream_extractor_arith/09.cc

   1 // 1999-04-12 bkoz
   2
   3 // Copyright (C) 1999, 2000, 2002, 2003 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 2, 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 COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // 27.6.1.2.2 arithmetic extractors
  22
  23 #include <cstdio> // for printf
  24 #include <istream>
  25 #include <ostream>
  26 #include <sstream>
  27 #include <locale>
  28 #include <testsuite_hooks.h>
  29
  30 std::string str_01;
  31 std::string str_02("true false 0 1 110001");
  32 std::string str_03("-19999999 777777 -234234 233 -234 33 1 66300.25 .315 1.5");
  33 std::string str_04("0123");
  34
  35 std::stringbuf isbuf_01(std::ios_base::in);
  36 std::stringbuf isbuf_02(str_02, std::ios_base::in);
  37 std::stringbuf isbuf_03(str_03, std::ios_base::in);
  38 std::stringbuf isbuf_04(str_04, std::ios_base::in);
  39
  40 std::istream is_01(NULL);
  41 std::istream is_02(&isbuf_02);
  42 std::istream is_03(&isbuf_03);
  43 std::istream is_04(&isbuf_04);
  44 std::stringstream ss_01(str_01);
  45
  46 bool test09()
  47 {
  48    bool test = true;
  49
  50    std::string st("2.456e3-+0.567e-2");
  51    std::stringbuf sb(st);
  52    std::istream is(&sb);
  53    double f1 = 0, f2 = 0;
  54    char c;
  55    (is>>std::ws) >> f1;
  56    (is>>std::ws) >> c;
  57    (is>>std::ws) >> f2;
  58    test = f1 == 2456;
  59    VERIFY( f2 == 0.00567 );
  60    VERIFY( c == '-' );
  61 #ifdef DEBUG_ASSERT
  62   assert(test);
  63 #endif
  64
  65   return test;
  66 }
  67
  68 int main()
  69 {
  70   test09();
  71   return 0;
  72 }