| // (C) Copyright John Maddock 2007. |
| // 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) |
| |
| #include <boost/math/bindings/rr.hpp> |
| #include <boost/math/special_functions/expint.hpp> |
| #include <boost/math/constants/constants.hpp> |
| #include <fstream> |
| |
| #include <boost/math/tools/test_data.hpp> |
| |
| using namespace boost::math::tools; |
| |
| struct expint_data_generator |
| { |
| boost::math::ntl::RR operator()(boost::math::ntl::RR a, boost::math::ntl::RR b) |
| { |
| unsigned n = boost::math::tools::real_cast<unsigned>(a); |
| std::cout << n << " " << b << " "; |
| boost::math::ntl::RR result = boost::math::expint(n, b); |
| std::cout << result << std::endl; |
| return result; |
| } |
| }; |
| |
| |
| int main() |
| { |
| boost::math::ntl::RR::SetPrecision(1000); |
| boost::math::ntl::RR::SetOutputPrecision(40); |
| |
| boost::math::expint(1, 0.06227754056453704833984375); |
| std::cout << boost::math::expint(1, boost::math::ntl::RR(0.5)) << std::endl; |
| |
| parameter_info<boost::math::ntl::RR> arg1, arg2; |
| test_data<boost::math::ntl::RR> data; |
| |
| std::cout << "Welcome.\n" |
| "This program will generate spot tests for the expint function:\n" |
| " expint(a, b)\n\n"; |
| |
| bool cont; |
| std::string line; |
| |
| do{ |
| get_user_parameter_info(arg1, "a"); |
| get_user_parameter_info(arg2, "b"); |
| data.insert(expint_data_generator(), arg1, arg2); |
| |
| std::cout << "Any more data [y/n]?"; |
| std::getline(std::cin, line); |
| boost::algorithm::trim(line); |
| cont = (line == "y"); |
| }while(cont); |
| |
| std::cout << "Enter name of test data file [default=expint_data.ipp]"; |
| std::getline(std::cin, line); |
| boost::algorithm::trim(line); |
| if(line == "") |
| line = "expint_data.ipp"; |
| std::ofstream ofs(line.c_str()); |
| write_code(ofs, data, "expint_data"); |
| |
| return 0; |
| } |
| |