[Boost-commit] svn:boost r85177 - trunk/libs/math/example

Subject: [Boost-commit] svn:boost r85177 - trunk/libs/math/example
From: john_at_[hidden]
Date: 2013-07-31 07:47:52

Author: johnmaddock
Date: 2013-07-31 07:47:52 EDT (Wed, 31 Jul 2013)
New Revision: 85177
URL: http://svn.boost.org/trac/boost/changeset/85177

Log:
Add needed file.

Added:
   trunk/libs/math/example/special_data.cpp   (contents, props changed)

Added: trunk/libs/math/example/special_data.cpp
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ trunk/libs/math/example/special_data.cpp	2013-07-31 07:47:52 EDT (Wed, 31 Jul 2013)	(r85177)
@@ -0,0 +1,84 @@
+// Copyright John Maddock 2006.
+// 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)
+
+//[special_data_example
+
+#include <boost/multiprecision/cpp_dec_float.hpp>
+#include <boost/math/tools/test_data.hpp>
+#include <boost/test/included/prg_exec_monitor.hpp>
+#include <fstream>
+
+using namespace boost::math::tools;
+using namespace boost::math;
+using namespace std;
+using namespace boost::multiprecision;
+
+template <class T>
+T my_special(T a, T b)
+{
+   // Implementation of my_special here...
+   return a + b;
+}
+
+int cpp_main(int argc, char*argv [])
+{
+   //
+   // We'll use so many digits of precision that any
+   // calculation errors will still leave us with
+   // 40-50 good digits.  We'll only run this program
+   // once so it doesn't matter too much how long this takes!
+   //
+   typedef number<cpp_dec_float<500> > bignum;
+
+   parameter_info<bignum> arg1, arg2;
+   test_data<bignum> data;
+
+   bool cont;
+   std::string line;
+
+   if(argc < 1)
+      return 1;
+
+   do{
+      //
+      // User interface which prompts for 
+      // range of input parameters:
+      //
+      if(0 == get_user_parameter_info(arg1, "a"))
+         return 1;
+      if(0 == get_user_parameter_info(arg2, "b"))
+         return 1;
+
+      //
+      // Get a pointer to the function and call
+      // test_data::insert to actually generate
+      // the values.
+      //
+      bignum (*fp)(bignum, bignum) = &my_special;
+      data.insert(fp, arg2, arg1);
+
+      std::cout << "Any more data [y/n]?";
+      std::getline(std::cin, line);
+      boost::algorithm::trim(line);
+      cont = (line == "y");
+   }while(cont);
+   //
+   // Just need to write the results to a file:
+   //
+   std::cout << "Enter name of test data file [default=my_special.ipp]";
+   std::getline(std::cin, line);
+   boost::algorithm::trim(line);
+   if(line == "")
+      line = "my_special.ipp";
+   std::ofstream ofs(line.c_str());
+   line.erase(line.find('.'));
+   ofs << std::scientific << std::setprecision(50);
+   write_code(ofs, data, line.c_str());
+
+   return 0;
+}
+
+//]