1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Floating-Point Precision</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. Boost.Convert 2.0"> 8<link rel="up" href="../formatting_support.html" title="Formatting Support"> 9<link rel="prev" href="leading_whitespace_characters.html" title="Leading Whitespace Characters"> 10<link rel="next" href="../supported_string_types.html" title="Supported String Types"> 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="leading_whitespace_characters.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../formatting_support.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="../supported_string_types.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h5 class="title"> 27<a name="boost_convert.converters_detail.strtol_converter.formatting_support.floating_point_precision"></a><a class="link" href="floating_point_precision.html" title="Floating-Point Precision">Floating-Point 28 Precision</a> 29</h5></div></div></div> 30<p> 31</p> 32<pre class="programlisting"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">cnv</span><span class="special">::</span><span class="identifier">strtol</span> <span class="identifier">cnv</span><span class="special">;</span> 33 34<span class="identifier">BOOST_TEST</span><span class="special">(</span> <span class="string">"12.3"</span> <span class="special">==</span> <span class="identifier">convert</span><span class="special"><</span><span class="identifier">string</span><span class="special">>(</span><span class="number">12.3456</span><span class="special">,</span> <span class="identifier">cnv</span><span class="special">(</span><span class="identifier">arg</span><span class="special">::</span><span class="identifier">precision</span> <span class="special">=</span> <span class="number">1</span><span class="special">)).</span><span class="identifier">value</span><span class="special">());</span> 35<span class="identifier">BOOST_TEST</span><span class="special">(</span> <span class="string">"12.35"</span> <span class="special">==</span> <span class="identifier">convert</span><span class="special"><</span><span class="identifier">string</span><span class="special">>(</span><span class="number">12.3456</span><span class="special">,</span> <span class="identifier">cnv</span><span class="special">(</span><span class="identifier">arg</span><span class="special">::</span><span class="identifier">precision</span> <span class="special">=</span> <span class="number">2</span><span class="special">)).</span><span class="identifier">value</span><span class="special">());</span> 36<span class="identifier">BOOST_TEST</span><span class="special">(</span><span class="string">"12.346"</span> <span class="special">==</span> <span class="identifier">convert</span><span class="special"><</span><span class="identifier">string</span><span class="special">>(</span><span class="number">12.3456</span><span class="special">,</span> <span class="identifier">cnv</span><span class="special">(</span><span class="identifier">arg</span><span class="special">::</span><span class="identifier">precision</span> <span class="special">=</span> <span class="number">3</span><span class="special">)).</span><span class="identifier">value</span><span class="special">());</span> 37 38<span class="identifier">BOOST_TEST</span><span class="special">(</span> <span class="string">"-12.3"</span> <span class="special">==</span> <span class="identifier">convert</span><span class="special"><</span><span class="identifier">string</span><span class="special">>(-</span><span class="number">12.3456</span><span class="special">,</span> <span class="identifier">cnv</span><span class="special">(</span><span class="identifier">arg</span><span class="special">::</span><span class="identifier">precision</span> <span class="special">=</span> <span class="number">1</span><span class="special">)).</span><span class="identifier">value</span><span class="special">());</span> 39<span class="identifier">BOOST_TEST</span><span class="special">(</span> <span class="string">"-12.35"</span> <span class="special">==</span> <span class="identifier">convert</span><span class="special"><</span><span class="identifier">string</span><span class="special">>(-</span><span class="number">12.3456</span><span class="special">,</span> <span class="identifier">cnv</span><span class="special">(</span><span class="identifier">arg</span><span class="special">::</span><span class="identifier">precision</span> <span class="special">=</span> <span class="number">2</span><span class="special">)).</span><span class="identifier">value</span><span class="special">());</span> 40<span class="identifier">BOOST_TEST</span><span class="special">(</span><span class="string">"-12.346"</span> <span class="special">==</span> <span class="identifier">convert</span><span class="special"><</span><span class="identifier">string</span><span class="special">>(-</span><span class="number">12.3456</span><span class="special">,</span> <span class="identifier">cnv</span><span class="special">(</span><span class="identifier">arg</span><span class="special">::</span><span class="identifier">precision</span> <span class="special">=</span> <span class="number">3</span><span class="special">)).</span><span class="identifier">value</span><span class="special">());</span> 41</pre> 42<p> 43 </p> 44</div> 45<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 46<td align="left"></td> 47<td align="right"><div class="copyright-footer">Copyright © 2009-2016 Vladimir Batov<p> 48 Distributed under the Boost Software License, Version 1.0. See copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>. 49 </p> 50</div></td> 51</tr></table> 52<hr> 53<div class="spirit-nav"> 54<a accesskey="p" href="leading_whitespace_characters.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../formatting_support.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="../supported_string_types.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 55</div> 56</body> 57</html> 58
