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libs/math/example/policy_ref_snip10.cpp

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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!
+
+// Setting precision in a single function call using make_policy.
+
+#include <iostream>
+using std::cout; using std::endl;
+
+//[policy_ref_snip10
+
+#include <boost/math/special_functions/gamma.hpp>
+using boost::math::tgamma;
+
+using namespace boost::math::policies;
+
+double t = tgamma(12, policy<digits10<5> >());  // Concise make_policy.
+
+//] //[/policy_ref_snip10]
+
+
+
+int main()
+{
+   cout << "tgamma(12, policy<digits10<5> >())  = "<< t << endl;
+}
+
+/*
+
+Output:
+
+ tgamma(12, policy<digits10<5> >())  = 3.99168e+007
+
+*/
+