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65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
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// Copyright 2003-2008 Jan Gaspar.
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// Copyright 2013 Paul A. Bristow. Added some Quickbook snippet markers.
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// Distributed under the Boost Software License, Version 1.0.
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// (See the accompanying file LICENSE_1_0.txt
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// or a copy at <http://www.boost.org/LICENSE_1_0.txt>.)
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//[circular_buffer_sum_example_1
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/*`This example shows several functions, including summing all valid values.
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*/
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#include <boost/circular_buffer.hpp>
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#include <numeric>
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#include <assert.h>
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int main(int /*argc*/, char* /*argv*/[])
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{
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// Create a circular buffer of capacity 3.
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boost::circular_buffer<int> cb(3);
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assert(cb.capacity() == 3);
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// Check is empty.
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assert(cb.size() == 0);
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assert(cb.empty());
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// Insert some elements into the circular buffer.
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cb.push_back(1);
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cb.push_back(2);
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// Assertions to check push_backs have expected effect.
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assert(cb[0] == 1);
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assert(cb[1] == 2);
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assert(!cb.full());
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assert(cb.size() == 2);
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assert(cb.capacity() == 3);
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// Insert some other elements.
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cb.push_back(3);
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cb.push_back(4);
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// Evaluate the sum of all elements.
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int sum = std::accumulate(cb.begin(), cb.end(), 0);
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// Assertions to check state.
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assert(sum == 9);
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assert(cb[0] == 2);
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assert(cb[1] == 3);
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assert(cb[2] == 4);
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assert(*cb.begin() == 2);
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assert(cb.front() == 2);
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assert(cb.back() == 4);
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assert(cb.full());
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assert(cb.size() == 3);
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assert(cb.capacity() == 3);
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return 0;
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}
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//] [/circular_buffer_sum_example_1]
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/*
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There is no output from this example.
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*/
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