libstdc++-v3/testsuite/26_numerics/adjacent_difference/1.cc

   1 // Copyright (C) 2001-2018 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // 26.4.4 [lib.adjacent.difference]
  19
  20 #include <algorithm>
  21 #include <numeric>
  22 #include <testsuite_hooks.h>
  23
  24 int A[] = {1, 4, 9, 16, 25, 36, 49, 64, 81, 100};
  25 int B[] = {1, 3, 5, 7, 9, 11, 13, 15, 17, 19};
  26 const int N = sizeof(A) / sizeof(int);
  27
  28 void
  29 test01()
  30 {
  31   int D[N];
  32
  33   std::adjacent_difference(A, A + N, D);
  34   VERIFY( std::equal(D, D + N, B) );
  35 }
  36
  37 int
  38 main()
  39 {
  40   test01();
  41   return 0;
  42 }