libstdc++-v3/testsuite/26_numerics/headers/cmath/powi.cc

   1 // 2005-02-13  Paolo Carlini  <pcarlini@suse.de>
   2
   3 // Copyright (C) 2005 Free Software Foundation
   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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // 26.5 C Library
  22
  23 #include <cmath>
  24 #include <testsuite_hooks.h>
  25
  26 template<typename T>
  27   void test01_do()
  28   {
  29     using namespace std;
  30     bool test __attribute__((unused)) = true;
  31
  32     VERIFY( pow(T(1.0), 0) == T(1.0) );
  33     VERIFY( pow(T(2.0), 0) == T(1.0) );
  34     VERIFY( pow(T(-1.0), 0) == T(1.0) );
  35     VERIFY( pow(T(-4.0), 0) == T(1.0) );
  36
  37     VERIFY( pow(T(1.0), 1) == T(1.0) );
  38     VERIFY( pow(T(2.0), 1) == T(2.0) );
  39     VERIFY( pow(T(-1.0), 1) == T(-1.0) );
  40     VERIFY( pow(T(-4.0), 1) == T(-4.0) );
  41
  42     VERIFY( pow(T(1.0), -1) == T(1.0) / T(1.0) );
  43     VERIFY( pow(T(2.0), -1) == T(1.0) / T(2.0) );
  44     VERIFY( pow(T(-1.0), -1) == T(1.0) / T(-1.0) );
  45     VERIFY( pow(T(-4.0), -1) == T(1.0) / T(-4.0) );
  46
  47     VERIFY( pow(T(1.0), 2) == T(1.0) * T(1.0) );
  48     VERIFY( pow(T(2.0), 2) == T(2.0) * T(2.0) );
  49     VERIFY( pow(T(-1.0), 2) == T(-1.0) * T(-1.0) );
  50     VERIFY( pow(T(-4.0), 2) == T(-4.0) * T(-4.0) );
  51   }
  52
  53 void test01()
  54 {
  55   test01_do<float>();
  56   test01_do<double>();
  57   test01_do<long double>();
  58 }
  59
  60 int main()
  61 {
  62   test01();
  63   return 0;
  64 }