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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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|  | 
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|  | //[special_data_example
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|  | 
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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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|  | 
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|  | 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...
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|  |    return a + b; | ||
|  | } | ||
|  | 
 | ||
|  | int cpp_main(int argc, char*argv []) | ||
|  | { | ||
|  |    //
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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; | ||
|  | 
 | ||
|  |    parameter_info<bignum> arg1, arg2; | ||
|  |    test_data<bignum> data; | ||
|  | 
 | ||
|  |    bool cont; | ||
|  |    std::string line; | ||
|  | 
 | ||
|  |    if(argc < 1) | ||
|  |       return 1; | ||
|  | 
 | ||
|  |    do{ | ||
|  |       //
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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")) | ||
|  |          return 1; | ||
|  |       if(0 == get_user_parameter_info(arg2, "b")) | ||
|  |          return 1; | ||
|  | 
 | ||
|  |       //
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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; | ||
|  |       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:
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|  |    //
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|  |    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; | ||
|  | } | ||
|  | 
 | ||
|  | //]
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