devn00b
/
EQ2EMu


			
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138
							<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Overlap counter</title>
<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
<link rel="home" href="../../index.html" title="Chapter&#160;1.&#160;Boost.Icl">
<link rel="up" href="../examples.html" title="Examples">
<link rel="prev" href="interval_container.html" title="Interval container">
<link rel="next" href="partys_height_average.html" title="Party's height average">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table cellpadding="2" width="100%"><tr>
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td>
<td align="center"><a href="../../../../../../index.html">Home</a></td>
<td align="center"><a href="../../../../../libraries.htm">Libraries</a></td>
<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
<td align="center"><a href="../../../../../../more/index.htm">More</a></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="interval_container.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../examples.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="partys_height_average.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="boost_icl.examples.overlap_counter"></a><a class="link" href="overlap_counter.html" title="Overlap counter">Overlap counter</a>
</h3></div></div></div>
<p>
        Example <span class="bold"><strong>overlap counter</strong></span> provides the simplest
        application of an interval_map that maps intervals to integers. An interval_map&lt;int,int&gt;
        serves as an overlap counter if we only add interval value pairs that carry
        1 as associated value.
      </p>
<p>
        Doing so, the associated values that are accumulated in the interval_map
        are just the number of overlaps of all added intervals.
      </p>
<p>
</p>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">iostream</span><span class="special">&gt;</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">icl</span><span class="special">/</span><span class="identifier">split_interval_map</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>

<span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">std</span><span class="special">;</span>
<span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">icl</span><span class="special">;</span>


<span class="comment">/* The most simple example of an interval_map is an overlap counter.
   If intervals are added that are associated with the value 1,
   all overlaps of added intervals are counted as a result in the
   associated values.
*/</span>
<span class="keyword">typedef</span> <span class="identifier">interval_map</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span> <span class="identifier">OverlapCounterT</span><span class="special">;</span>

<span class="keyword">void</span> <span class="identifier">print_overlaps</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">OverlapCounterT</span><span class="special">&amp;</span> <span class="identifier">counter</span><span class="special">)</span>
<span class="special">{</span>
    <span class="keyword">for</span><span class="special">(</span><span class="identifier">OverlapCounterT</span><span class="special">::</span><span class="identifier">const_iterator</span> <span class="identifier">it</span> <span class="special">=</span> <span class="identifier">counter</span><span class="special">.</span><span class="identifier">begin</span><span class="special">();</span> <span class="identifier">it</span> <span class="special">!=</span> <span class="identifier">counter</span><span class="special">.</span><span class="identifier">end</span><span class="special">();</span> <span class="identifier">it</span><span class="special">++)</span>
    <span class="special">{</span>
        <span class="identifier">discrete_interval</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="identifier">itv</span>  <span class="special">=</span> <span class="special">(*</span><span class="identifier">it</span><span class="special">).</span><span class="identifier">first</span><span class="special">;</span>
        <span class="keyword">int</span> <span class="identifier">overlaps_count</span> <span class="special">=</span> <span class="special">(*</span><span class="identifier">it</span><span class="special">).</span><span class="identifier">second</span><span class="special">;</span>
        <span class="keyword">if</span><span class="special">(</span><span class="identifier">overlaps_count</span> <span class="special">==</span> <span class="number">1</span><span class="special">)</span>
            <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"in interval "</span> <span class="special">&lt;&lt;</span> <span class="identifier">itv</span> <span class="special">&lt;&lt;</span> <span class="string">" intervals do not overlap"</span> <span class="special">&lt;&lt;</span> <span class="identifier">endl</span><span class="special">;</span>
        <span class="keyword">else</span>
            <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"in interval "</span> <span class="special">&lt;&lt;</span> <span class="identifier">itv</span> <span class="special">&lt;&lt;</span> <span class="string">": "</span><span class="special">&lt;&lt;</span> <span class="identifier">overlaps_count</span> <span class="special">&lt;&lt;</span> <span class="string">" intervals overlap"</span> <span class="special">&lt;&lt;</span> <span class="identifier">endl</span><span class="special">;</span>
    <span class="special">}</span>
<span class="special">}</span>

<span class="keyword">void</span> <span class="identifier">overlap_counter</span><span class="special">()</span>
<span class="special">{</span>
    <span class="identifier">OverlapCounterT</span> <span class="identifier">overlap_counter</span><span class="special">;</span>
    <span class="identifier">discrete_interval</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="identifier">inter_val</span><span class="special">;</span>

    <span class="identifier">inter_val</span> <span class="special">=</span> <span class="identifier">discrete_interval</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">right_open</span><span class="special">(</span><span class="number">4</span><span class="special">,</span><span class="number">8</span><span class="special">);</span>
    <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"-- adding   "</span> <span class="special">&lt;&lt;</span> <span class="identifier">inter_val</span> <span class="special">&lt;&lt;</span> <span class="string">" -----------------------------------------"</span> <span class="special">&lt;&lt;</span> <span class="identifier">endl</span><span class="special">;</span>
    <span class="identifier">overlap_counter</span> <span class="special">+=</span> <span class="identifier">make_pair</span><span class="special">(</span><span class="identifier">inter_val</span><span class="special">,</span> <span class="number">1</span><span class="special">);</span>
    <span class="identifier">print_overlaps</span><span class="special">(</span><span class="identifier">overlap_counter</span><span class="special">);</span>
    <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"-----------------------------------------------------------"</span> <span class="special">&lt;&lt;</span> <span class="identifier">endl</span><span class="special">;</span>

    <span class="identifier">inter_val</span> <span class="special">=</span> <span class="identifier">discrete_interval</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">right_open</span><span class="special">(</span><span class="number">6</span><span class="special">,</span><span class="number">9</span><span class="special">);</span>
    <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"-- adding   "</span> <span class="special">&lt;&lt;</span> <span class="identifier">inter_val</span> <span class="special">&lt;&lt;</span> <span class="string">" -----------------------------------------"</span> <span class="special">&lt;&lt;</span> <span class="identifier">endl</span><span class="special">;</span>
    <span class="identifier">overlap_counter</span> <span class="special">+=</span> <span class="identifier">make_pair</span><span class="special">(</span><span class="identifier">inter_val</span><span class="special">,</span> <span class="number">1</span><span class="special">);</span>
    <span class="identifier">print_overlaps</span><span class="special">(</span><span class="identifier">overlap_counter</span><span class="special">);</span>
    <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"-----------------------------------------------------------"</span> <span class="special">&lt;&lt;</span> <span class="identifier">endl</span><span class="special">;</span>

    <span class="identifier">inter_val</span> <span class="special">=</span> <span class="identifier">discrete_interval</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">right_open</span><span class="special">(</span><span class="number">1</span><span class="special">,</span><span class="number">9</span><span class="special">);</span>
    <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"-- adding   "</span> <span class="special">&lt;&lt;</span> <span class="identifier">inter_val</span> <span class="special">&lt;&lt;</span> <span class="string">" -----------------------------------------"</span> <span class="special">&lt;&lt;</span> <span class="identifier">endl</span><span class="special">;</span>
    <span class="identifier">overlap_counter</span> <span class="special">+=</span> <span class="identifier">make_pair</span><span class="special">(</span><span class="identifier">inter_val</span><span class="special">,</span> <span class="number">1</span><span class="special">);</span>
    <span class="identifier">print_overlaps</span><span class="special">(</span><span class="identifier">overlap_counter</span><span class="special">);</span>
    <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"-----------------------------------------------------------"</span> <span class="special">&lt;&lt;</span> <span class="identifier">endl</span><span class="special">;</span>

<span class="special">}</span>

<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
<span class="special">{</span>
    <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"&gt;&gt;Interval Container Library: Sample overlap_counter.cpp &lt;&lt;\n"</span><span class="special">;</span>
    <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"-----------------------------------------------------------\n"</span><span class="special">;</span>
    <span class="identifier">overlap_counter</span><span class="special">();</span>
    <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
<span class="special">}</span>

<span class="comment">// Program output:</span>

<span class="comment">// &gt;&gt;Interval Container Library: Sample overlap_counter.cpp &lt;&lt;</span>
<span class="comment">// -----------------------------------------------------------</span>
<span class="comment">// -- adding   [4,8) -----------------------------------------</span>
<span class="comment">// in interval [4,8) intervals do not overlap</span>
<span class="comment">// -----------------------------------------------------------</span>
<span class="comment">// -- adding   [6,9) -----------------------------------------</span>
<span class="comment">// in interval [4,6) intervals do not overlap</span>
<span class="comment">// in interval [6,8): 2 intervals overlap</span>
<span class="comment">// in interval [8,9) intervals do not overlap</span>
<span class="comment">// -----------------------------------------------------------</span>
<span class="comment">// -- adding   [1,9) -----------------------------------------</span>
<span class="comment">// in interval [1,4) intervals do not overlap</span>
<span class="comment">// in interval [4,6): 2 intervals overlap</span>
<span class="comment">// in interval [6,8): 3 intervals overlap</span>
<span class="comment">// in interval [8,9): 2 intervals overlap</span>
<span class="comment">// -----------------------------------------------------------</span>
</pre>
<p>
      </p>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2007-2010 Joachim
      Faulhaber<br>Copyright &#169; 1999-2006 Cortex Software
      GmbH<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
      </p>
</div></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="interval_container.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../examples.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="partys_height_average.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
</div>
</body>
</html>