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64 lines
1.5 KiB
C++
64 lines
1.5 KiB
C++
// 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_example_1
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/*`For all examples, we need this include:
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*/
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#include <boost/circular_buffer.hpp>
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//] [/circular_buffer_example_1]
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int main()
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{
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//[circular_buffer_example_2
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// Create a circular buffer with a capacity for 3 integers.
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boost::circular_buffer<int> cb(3);
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// Insert threee elements into the buffer.
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cb.push_back(1);
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cb.push_back(2);
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cb.push_back(3);
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int a = cb[0]; // a == 1
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int b = cb[1]; // b == 2
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int c = cb[2]; // c == 3
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// The buffer is full now, so pushing subsequent
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// elements will overwrite the front-most elements.
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cb.push_back(4); // Overwrite 1 with 4.
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cb.push_back(5); // Overwrite 2 with 5.
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// The buffer now contains 3, 4 and 5.
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a = cb[0]; // a == 3
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b = cb[1]; // b == 4
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c = cb[2]; // c == 5
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// Elements can be popped from either the front or the back.
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cb.pop_back(); // 5 is removed.
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cb.pop_front(); // 3 is removed.
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// Leaving only one element with value = 4.
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int d = cb[0]; // d == 4
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//] [/circular_buffer_example_2]
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return 0;
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}
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/*
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//[circular_buffer_example_output
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There is no output from this example.
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//] [/circular_buffer_example_output]
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*/
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