44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
///////////////////////////////////////////////////////////////
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// Copyright 2015 John Maddock. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
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#include <boost/multiprecision/cpp_int.hpp>
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#include <iostream>
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#include <iomanip>
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#include <vector>
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#include <iterator>
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//[IE1
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/*`
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In this simple example, we'll import/export the bits of a cpp_int
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to a vector of 8-bit unsigned values:
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*/
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/*=
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#include <boost/multiprecision/cpp_int.hpp>
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#include <iostream>
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#include <iomanip>
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#include <vector>
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#include <iterator>
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*/
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int main()
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{
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using boost::multiprecision::cpp_int;
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// Create a cpp_int with just a couple of bits set:
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cpp_int i;
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bit_set(i, 5000); // set the 5000'th bit
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bit_set(i, 200);
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bit_set(i, 50);
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// export into 8-bit unsigned values, most significant bit first:
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std::vector<unsigned char> v;
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export_bits(i, std::back_inserter(v), 8);
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// import back again, and check for equality:
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cpp_int j;
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import_bits(j, v.begin(), v.end());
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BOOST_ASSERT(i == j);
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}
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//]
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