libstdc++-v3/testsuite/26_numerics/numeric_operations/sum_diff.cc

   1 // Copyright (C) 2001, 2004 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 2, 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 COPYING.  If not, write to the Free
  16 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  17 // USA.
  18
  19 // 26.4.3 [lib.partial.sum]
  20 // 26.4.4 [lib.adjacent.difference]
  21
  22 #include <algorithm>
  23 #include <numeric>
  24 #include <testsuite_hooks.h>
  25
  26 int A[] = {1, 4, 9, 16, 25, 36, 49, 64, 81, 100};
  27 int B[] = {1, 3, 5, 7, 9, 11, 13, 15, 17, 19};
  28 const int N = sizeof(A) / sizeof(int);
  29
  30 void
  31 test01()
  32 {
  33   bool test __attribute__((unused)) = true;
  34
  35   int D[N];
  36
  37   std::adjacent_difference(A, A + N, D);
  38   VERIFY( std::equal(D, D + N, B) );
  39
  40   std::partial_sum(D, D + N, D);
  41   VERIFY( std::equal(D, D + N, A) );
  42 }
  43
  44 int
  45 main()
  46 {
  47     test01();
  48     return 0;
  49 }