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- // Copyright John Maddock 2007.
- // Copyright Paul A. Bristow 2010
- // Use, modification and distribution are subject to the
- // Boost Software License, Version 1.0. (See accompanying file
- // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- // Note that this file contains quickbook mark-up as well as code
- // and comments, don't change any of the special comment mark-ups!
- #include <iostream>
- using std::cout; using std::endl;
- //[policy_ref_snip9
- #include <boost/math/special_functions/gamma.hpp>
- using boost::math::tgamma;
- using boost::math::policies::policy;
- using boost::math::policies::digits10;
- typedef policy<digits10<5> > my_pol_5; // Define a new, non-default, policy
- // to calculate tgamma to accuracy of approximately 5 decimal digits.
- //]
- int main()
- {
- cout.precision(5); // To only show 5 (hopefully) accurate decimal digits.
- double t = tgamma(12, my_pol_5()); // Apply the 5 decimal digits accuracy policy to use of tgamma.
- cout << "tgamma(12, my_pol_5() = " << t << endl;
- }
- /*
- Output:
- tgamma(12, my_pol_5() = 3.9917e+007
- */
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