ceph/src/boost/libs/math/example/policy_ref_snip4.cpp

   1 //  Copyright John Maddock 2007.
   2 //  Copyright Paul A. Bristow 2010.
   3 //  Use, modification and distribution are subject to the
   4 //  Boost Software License, Version 1.0. (See accompanying file
   5 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6
   7 // Note that this file contains quickbook mark-up as well as code
   8 // and comments, don't change any of the special comment mark-ups!
   9
  10 #ifdef _MSC_VER
  11 # pragma warning (disable : 4305) // 'initializing' : truncation from 'long double' to 'const eval_type'
  12 # pragma warning (disable : 4244) // 'conversion' : truncation from 'long double' to 'const eval_type'
  13 #endif
  14
  15 //[policy_ref_snip4
  16
  17 #include <boost/math/distributions/normal.hpp>
  18 using boost::math::normal_distribution;
  19
  20 using namespace boost::math::policies;
  21
  22 // Define a policy:
  23 typedef policy<
  24       promote_float<false>
  25       > my_policy;
  26
  27 // Define the new normal distribution using my_policy:
  28 typedef normal_distribution<float, my_policy> my_norm;
  29
  30 // Get a quantile:
  31 float q = quantile(my_norm(), 0.05f);
  32
  33 //] [policy_ref_snip4]
  34
  35 #include <iostream>
  36 using std::cout; using std::endl;
  37
  38 int main()
  39 {
  40    cout << " quantile(my_norm(), 0.05f) = " << q << endl; //   -1.64485
  41 }