multiprecision/example/mixed_integer_arithmetic.cpp
2019-04-23 08:51:47 +02:00

56 lines
1.3 KiB
C++

///////////////////////////////////////////////////////////////
// Copyright 2012 John Maddock. Distributed under the Boost
// Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
//
// Compare arithmetic results using fixed_int to GMP results.
//
#ifdef _MSC_VER
# define _SCL_SECURE_NO_WARNINGS
#endif
//[mixed_eg
#include <boost/multiprecision/cpp_int.hpp>
int main()
{
using namespace boost::multiprecision;
boost::uint64_t i = (std::numeric_limits<boost::uint64_t>::max)();
boost::uint64_t j = 1;
uint128_t ui128;
uint256_t ui256;
//
// Start by performing arithmetic on 64-bit integers to yield 128-bit results:
//
std::cout << std::hex << std::showbase << i << std::endl;
std::cout << std::hex << std::showbase << add(ui128, i, j) << std::endl;
std::cout << std::hex << std::showbase << multiply(ui128, i, i) << std::endl;
//
// The try squaring a 128-bit integer to yield a 256-bit result:
//
ui128 = (std::numeric_limits<uint128_t>::max)();
std::cout << std::hex << std::showbase << multiply(ui256, ui128, ui128) << std::endl;
return 0;
}
//]
/*
Program output:
//[mixed_output
0xffffffffffffffff
0x10000000000000000
0xFFFFFFFFFFFFFFFE0000000000000001
0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE00000000000000000000000000000001
//]
*/