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源代码在线查看: overflow.cpp

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关键词: boost API dev 标准
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相关代码

				/* Boost test/overflow.cpp
				 * test if extended precision exponent does not disturb interval computation
				 *
				 * Copyright Guillaume Melquiond 2002-2003
				 * Permission to use, copy, modify, sell, and distribute this software
				 * is hereby granted without fee provided that the above copyright notice
				 * appears in all copies and that both that copyright notice and this
				 * permission notice appear in supporting documentation.
				 *
				 * None of the above authors nor Polytechnic University make any
				 * representation about the suitability of this software for any
				 * purpose. It is provided "as is" without express or implied warranty.
				 *
				 * $Id: overflow.cpp,v 1.6 2003/06/04 09:18:47 gmelquio Exp $
				 */
				
				#include 
				#include 
				#include "bugs.hpp"
				
				template
				void test_one(typename I::base_type x, typename I::base_type f) {
				  I y = x;
				  typename I::base_type g = 1 / f;
				  const int nb = 10000;
				  for(int i = 0; i < nb; i++) y *= f;
				  for(int i = 0; i < nb; i++) y *= g;
				  BOOST_TEST(in(x, y));
				# ifdef __BORLANDC__
				  ::detail::ignore_unused_variable_warning(nb);
				# endif
				}
				
				template
				void test() {
				  test_one(1., 25.);
				  test_one(1., 0.04);
				  test_one(-1., 25.);
				  test_one(-1., 0.04);
				}
				
				int test_main(int, char *[]) {
				  test();
				  test();
				  test();
				# ifdef __BORLANDC__
				  ::detail::ignore_warnings();
				# endif
				  return 0;
				}
							

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