87 lines
2.6 KiB
C++
87 lines
2.6 KiB
C++
//=======================================================================
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// Copyright 1997, 1998, 1999, 2000 University of Notre Dame.
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// Authors: Andrew Lumsdaine, Lie-Quan Lee, Jeremy G. Siek
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//=======================================================================
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#include <boost/config.hpp>
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#include <iostream>
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#include <vector>
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#include <boost/graph/random.hpp>
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#ifndef BOOST_NO_CXX11_HDR_RANDOM
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#include <random>
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namespace random_ns = std;
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#else
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#include <boost/random/mersenne_twister.hpp>
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namespace random_ns = boost;
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#endif
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#include <algorithm>
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#include <boost/pending/fibonacci_heap.hpp>
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#include <boost/graph/graph_utility.hpp>
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#include <boost/pending/indirect_cmp.hpp>
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using namespace boost;
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int main()
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{
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typedef indirect_cmp< float*, std::less< float > > ICmp;
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int i;
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random_ns::mt19937 gen;
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for (int N = 2; N < 200; ++N)
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{
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uniform_int<> distrib(0, N - 1);
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boost::variate_generator< random_ns::mt19937&, uniform_int<> > rand_gen(
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gen, distrib);
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for (int t = 0; t < 10; ++t)
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{
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std::vector< float > v, w(N);
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ICmp cmp(&w[0], std::less< float >());
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fibonacci_heap< int, ICmp > Q(N, cmp);
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for (int c = 0; c < w.size(); ++c)
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w[c] = c;
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#ifndef BOOST_NO_CXX98_RANDOM_SHUFFLE
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std::random_shuffle(w.begin(), w.end());
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#else
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std::shuffle(w.begin(), w.end(), gen);
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#endif
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for (i = 0; i < N; ++i)
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Q.push(i);
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for (i = 0; i < N; ++i)
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{
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int u = rand_gen();
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float r = rand_gen();
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r /= 2.0;
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w[u] = w[u] - r;
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Q.update(u);
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}
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for (i = 0; i < N; ++i)
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{
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v.push_back(w[Q.top()]);
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Q.pop();
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}
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std::sort(w.begin(), w.end());
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if (!std::equal(v.begin(), v.end(), w.begin()))
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{
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std::cout << std::endl << "heap sorted: ";
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std::copy(v.begin(), v.end(),
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std::ostream_iterator< float >(std::cout, " "));
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std::cout << std::endl << "correct: ";
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std::copy(w.begin(), w.end(),
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std::ostream_iterator< float >(std::cout, " "));
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std::cout << std::endl;
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return -1;
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}
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}
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}
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std::cout << "fibonacci heap passed test" << std::endl;
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return 0;
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}
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