text: /*################################################################################
    ##
    ##   Copyright (C) 2016-2020 Keith O'Hara
    ##
    ##   This file is part of the GCE-Math C++ library.
    ##
    ##   Licensed under the Apache License, Version 2.0 (the "License");
    ##   you may not use this file except in compliance with the License.
    ##   You may obtain a copy of the License at
    ##
    ##       http://www.apache.org/licenses/LICENSE-2.0
    ##
    ##   Unless required by applicable law or agreed to in writing, software
    ##   distributed under the License is distributed on an "AS IS" BASIS,
    ##   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    ##   See the License for the specific language governing permissions and
    ##   limitations under the License.
    ##
    ################################################################################*/
  
  #define TEST_PRINT_PRECISION_1 6
  #define TEST_PRINT_PRECISION_2 18
  
  #include "gcem_tests.hpp"
  
  int main()
  {
      print_begin("atan");
  
      //
  
      GCEM_TEST_COMPARE_VALS(gcem::atan,std::atan,0.0L);
      GCEM_TEST_COMPARE_VALS(gcem::atan,std::atan,0.001L);
      GCEM_TEST_COMPARE_VALS(gcem::atan,std::atan,0.49L);
      GCEM_TEST_COMPARE_VALS(gcem::atan,std::atan,-0.5L);
      GCEM_TEST_COMPARE_VALS(gcem::atan,std::atan,-1.5L);
      GCEM_TEST_COMPARE_VALS(gcem::atan,std::atan,0.7568025L);
      GCEM_TEST_COMPARE_VALS(gcem::atan,std::atan,0.99L);
      GCEM_TEST_COMPARE_VALS(gcem::atan,std::atan,1.49L);
      GCEM_TEST_COMPARE_VALS(gcem::atan,std::atan,1.99L);
  
      GCEM_TEST_COMPARE_VALS(gcem::atan,std::atan,2.49L);
      GCEM_TEST_COMPARE_VALS(gcem::atan,std::atan,2.51L);
      GCEM_TEST_COMPARE_VALS(gcem::atan,std::atan,3.99L);
      GCEM_TEST_COMPARE_VALS(gcem::atan,std::atan,7.0L);
      GCEM_TEST_COMPARE_VALS(gcem::atan,std::atan,11.0L);
      GCEM_TEST_COMPARE_VALS(gcem::atan,std::atan,25.0L);
  
      GCEM_TEST_COMPARE_VALS(gcem::atan,std::atan,101.0L);
      GCEM_TEST_COMPARE_VALS(gcem::atan,std::atan,900.0L);
      GCEM_TEST_COMPARE_VALS(gcem::atan,std::atan,1001.0L);
  
      GCEM_TEST_COMPARE_VALS(gcem::atan,std::atan,TEST_NAN);
  
      //
  
      print_final("atan");
  
      return 0;
  }
  