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

   1 // 2005-02-13  Paolo Carlini  <pcarlini@suse.de>
   2
   3 // Copyright (C) 2005-2024 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 // 26.5 C Library
  21
  22 #include <cmath>
  23 #include <testsuite_hooks.h>
  24
  25 template<typename T>
  26   void test01_do()
  27   {
  28     using namespace std;
  29
  30     VERIFY( pow(T(1.0), 0) == T(1.0) );
  31     VERIFY( pow(T(2.0), 0) == T(1.0) );
  32     VERIFY( pow(T(-1.0), 0) == T(1.0) );
  33     VERIFY( pow(T(-4.0), 0) == T(1.0) );
  34
  35     VERIFY( pow(T(1.0), 1) == T(1.0) );
  36     VERIFY( pow(T(2.0), 1) == T(2.0) );
  37     VERIFY( pow(T(-1.0), 1) == T(-1.0) );
  38     VERIFY( pow(T(-4.0), 1) == T(-4.0) );
  39
  40     VERIFY( pow(T(1.0), -1) == T(1.0) / T(1.0) );
  41     VERIFY( pow(T(2.0), -1) == T(1.0) / T(2.0) );
  42     VERIFY( pow(T(-1.0), -1) == T(1.0) / T(-1.0) );
  43     VERIFY( pow(T(-4.0), -1) == T(1.0) / T(-4.0) );
  44
  45     VERIFY( pow(T(1.0), 2) == T(1.0) * T(1.0) );
  46     VERIFY( pow(T(2.0), 2) == T(2.0) * T(2.0) );
  47     VERIFY( pow(T(-1.0), 2) == T(-1.0) * T(-1.0) );
  48     VERIFY( pow(T(-4.0), 2) == T(-4.0) * T(-4.0) );
  49   }
  50
  51 void test01()
  52 {
  53   test01_do<float>();
  54   test01_do<double>();
  55   test01_do<long double>();
  56 }
  57
  58 int main()
  59 {
  60   test01();
  61   return 0;
  62 }