ceph/src/boost/libs/yap/example/calc1.cpp

   1 // Copyright (C) 2016-2018 T. Zachary Laine
   2 //
   3 // Distributed under the Boost Software License, Version 1.0. (See
   4 // accompanying file LICENSE_1_0.txt or copy at
   5 // http://www.boost.org/LICENSE_1_0.txt)
   6 //[ calc1
   7 #include <boost/yap/expression.hpp>
   8
   9 #include <iostream>
  10
  11
  12 int main ()
  13 {
  14     using namespace boost::yap::literals;
  15
  16     // Displays "5"
  17     std::cout << evaluate( 1_p + 2.0, 3.0 ) << std::endl;
  18
  19     // Displays "6"
  20     std::cout << evaluate( 1_p * 2_p, 3.0, 2.0 ) << std::endl;
  21
  22     // Displays "0.5"
  23     std::cout << evaluate( (1_p - 2_p) / 2_p, 3.0, 2.0 ) << std::endl;
  24
  25     return 0;
  26 }
  27 //]