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85 lines
2.1 KiB
C++
85 lines
2.1 KiB
C++
// Copyright John Maddock 2006.
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// Use, modification and distribution are subject to the
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// Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt
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// or copy at http://www.boost.org/LICENSE_1_0.txt)
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//[special_data_example
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#include <boost/multiprecision/cpp_dec_float.hpp>
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#include <boost/math/tools/test_data.hpp>
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#include <boost/test/included/prg_exec_monitor.hpp>
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#include <fstream>
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using namespace boost::math::tools;
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using namespace boost::math;
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using namespace std;
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using namespace boost::multiprecision;
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template <class T>
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T my_special(T a, T b)
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{
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// Implementation of my_special here...
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return a + b;
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}
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int cpp_main(int argc, char*argv [])
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{
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//
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// We'll use so many digits of precision that any
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// calculation errors will still leave us with
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// 40-50 good digits. We'll only run this program
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// once so it doesn't matter too much how long this takes!
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//
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typedef number<cpp_dec_float<500> > bignum;
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parameter_info<bignum> arg1, arg2;
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test_data<bignum> data;
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bool cont;
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std::string line;
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if(argc < 1)
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return 1;
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do{
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//
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// User interface which prompts for
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// range of input parameters:
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//
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if(0 == get_user_parameter_info(arg1, "a"))
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return 1;
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if(0 == get_user_parameter_info(arg2, "b"))
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return 1;
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//
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// Get a pointer to the function and call
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// test_data::insert to actually generate
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// the values.
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//
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bignum (*fp)(bignum, bignum) = &my_special;
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data.insert(fp, arg2, arg1);
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std::cout << "Any more data [y/n]?";
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std::getline(std::cin, line);
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boost::algorithm::trim(line);
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cont = (line == "y");
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}while(cont);
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//
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// Just need to write the results to a file:
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//
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std::cout << "Enter name of test data file [default=my_special.ipp]";
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std::getline(std::cin, line);
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boost::algorithm::trim(line);
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if(line == "")
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line = "my_special.ipp";
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std::ofstream ofs(line.c_str());
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line.erase(line.find('.'));
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ofs << std::scientific << std::setprecision(50);
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write_code(ofs, data, line.c_str());
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return 0;
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}
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//]
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