1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Arithmetic functions</title> 5<link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../../index.html" title="Chapter 1. Phoenix 3.2.0"> 8<link rel="up" href="../tutorial_with_examples.html" title="Tutorial with examples"> 9<link rel="prev" href="../tutorial_with_examples.html" title="Tutorial with examples"> 10<link rel="next" href="list_generation.html" title="List Generation"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="../tutorial_with_examples.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../tutorial_with_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="list_generation.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h4 class="title"> 27<a name="phoenix.lazy_list.tutorial_with_examples.arithmetic_functions"></a><a class="link" href="arithmetic_functions.html" title="Arithmetic functions">Arithmetic 28 functions</a> 29</h4></div></div></div> 30<p> 31 Assume the values 32 </p> 33<pre class="programlisting"><span class="keyword">int</span> <span class="identifier">a</span> <span class="special">=</span> <span class="number">123</span><span class="special">;</span> 34<span class="keyword">int</span> <span class="identifier">b</span> <span class="special">=</span> <span class="number">256</span><span class="special">;</span> 35</pre> 36<p> 37 The following are all valid expressions returning a+b 38 </p> 39<pre class="programlisting"><span class="identifier">plus</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">,</span> <span class="identifier">arg2</span><span class="special">)(</span><span class="identifier">a</span><span class="special">,</span> <span class="identifier">b</span><span class="special">)</span> 40<span class="identifier">plus</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">,</span> <span class="identifier">b</span><span class="special">)(</span><span class="identifier">a</span><span class="special">)</span> 41<span class="identifier">plus</span><span class="special">(</span><span class="identifier">a</span><span class="special">,</span> <span class="identifier">arg2</span><span class="special">)(</span><span class="identifier">a</span><span class="special">,</span><span class="identifier">b</span><span class="special">)</span> 42<span class="identifier">plus</span><span class="special">(</span><span class="identifier">a</span><span class="special">,</span> <span class="identifier">arg1</span><span class="special">)(</span><span class="identifier">b</span><span class="special">)</span> 43<span class="identifier">plus</span><span class="special">(</span><span class="identifier">a</span><span class="special">,</span> <span class="identifier">b</span><span class="special">)()</span> 44</pre> 45<p> 46 The expressions can be combined like this 47 </p> 48<pre class="programlisting"><span class="identifier">plus</span><span class="special">(</span><span class="identifier">minus</span><span class="special">(</span><span class="identifier">a</span><span class="special">,</span> <span class="identifier">b</span><span class="special">),</span><span class="identifier">b</span><span class="special">)()</span> 49<span class="identifier">plus</span><span class="special">(</span><span class="identifier">minus</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">,</span> <span class="identifier">b</span><span class="special">),</span><span class="identifier">b</span><span class="special">)(</span><span class="identifier">a</span><span class="special">)</span> 50<span class="identifier">plus</span><span class="special">(</span><span class="identifier">minus</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">,</span> <span class="identifier">arg2</span><span class="special">),</span><span class="identifier">b</span><span class="special">)(</span><span class="identifier">a</span><span class="special">,</span><span class="identifier">b</span><span class="special">)</span> 51<span class="identifier">plus</span><span class="special">(</span><span class="identifier">minus</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">,</span> <span class="identifier">arg2</span><span class="special">),</span><span class="identifier">arg2</span><span class="special">)(</span><span class="identifier">a</span><span class="special">,</span><span class="identifier">b</span><span class="special">)</span> 52</pre> 53<p> 54 Other numerical operators can be used like this 55 </p> 56<pre class="programlisting"><span class="identifier">multiplies</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">,</span><span class="identifier">arg2</span><span class="special">)(</span><span class="number">3</span><span class="special">,</span><span class="number">6</span><span class="special">)</span> 57<span class="identifier">divides</span><span class="special">(</span><span class="identifier">arg2</span><span class="special">,</span><span class="identifier">arg1</span><span class="special">)(</span><span class="number">3</span><span class="special">,</span><span class="number">6</span><span class="special">)</span> 58<span class="identifier">modulus</span><span class="special">(</span><span class="identifier">arg2</span><span class="special">,</span><span class="identifier">arg1</span><span class="special">)(</span><span class="number">4</span><span class="special">,</span><span class="number">6</span><span class="special">)</span> 59<span class="identifier">min</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">,</span><span class="identifier">arg2</span><span class="special">)(</span><span class="number">4</span><span class="special">,</span><span class="number">6</span><span class="special">)</span> 60<span class="identifier">max</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">,</span><span class="identifier">arg2</span><span class="special">)(</span><span class="number">4</span><span class="special">,</span><span class="number">6</span><span class="special">)</span> 61<span class="identifier">inc</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">)(</span><span class="identifier">a</span><span class="special">)</span> 62<span class="identifier">dec</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">)(</span><span class="identifier">a</span><span class="special">)</span> 63<span class="identifier">negate</span><span class="special">(</span><span class="identifier">arg1</span><span class="special">)(</span><span class="identifier">a</span><span class="special">)</span> 64</pre> 65</div> 66<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 67<td align="left"></td> 68<td align="right"><div class="copyright-footer">Copyright © 2002-2005, 2010, 2014, 2015 Joel de Guzman, Dan Marsden, Thomas 69 Heller, John Fletcher<p> 70 Distributed under the Boost Software License, Version 1.0. (See accompanying 71 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>) 72 </p> 73</div></td> 74</tr></table> 75<hr> 76<div class="spirit-nav"> 77<a accesskey="p" href="../tutorial_with_examples.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../tutorial_with_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="list_generation.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 78</div> 79</body> 80</html> 81
