ceph/src/boost/libs/math/example/policy_ref_snip10.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 // Setting precision in a single function call using make_policy.
  11
  12 #include <iostream>
  13 using std::cout; using std::endl;
  14
  15 //[policy_ref_snip10
  16
  17 #include <boost/math/special_functions/gamma.hpp>
  18 using boost::math::tgamma;
  19
  20 using namespace boost::math::policies;
  21
  22 double t = tgamma(12, policy<digits10<5> >());  // Concise make_policy.
  23
  24 //] //[/policy_ref_snip10]
  25
  26
  27
  28 int main()
  29 {
  30    cout << "tgamma(12, policy<digits10<5> >())  = "<< t << endl;
  31 }
  32
  33 /*
  34
  35 Output:
  36
  37  tgamma(12, policy<digits10<5> >())  = 3.99168e+007
  38
  39 */
  40