asskoala/CKG
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

first commit

Browse Source
This commit is contained in:
Jose Caban
2025-06-07 11:34:38 -04:00
commit 0eb2d7c07d
4708 changed files with 1500614 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

69
extern/stdcxx/4.2.1/doc/stdlibug/12-3.html vendored Normal file
View File

@@ -0,0 +1,69 @@
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed
with this work for additional information regarding copyright
ownership. The ASF licenses this file to you under the Apache
License, Version 2.0 (the License); you may not use this file
except in compliance with the License. You may obtain a copy of
the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied. See the License for the specific language governing
permissions and limitations under the License.
Copyright 1999-2007 Rogue Wave Software, Inc.
-->
<HTML>
<HEAD>
<TITLE>Example Function: Split a Line into Words</TITLE>
<LINK REL=StyleSheet HREF="../rw.css" TYPE="text/css" TITLE="Apache stdcxx Stylesheet"></HEAD>
<BODY BGCOLOR=#FFFFFF>
<A HREF="12-2.html"><IMG SRC="images/bprev.gif" WIDTH=20 HEIGHT=21 ALT="Previous file" BORDER=O></A><A HREF="noframes.html"><IMG SRC="images/btop.gif" WIDTH=56 HEIGHT=21 ALT="Top of Document" BORDER=O></A><A HREF="booktoc.html"><IMG SRC="images/btoc.gif" WIDTH=56 HEIGHT=21 ALT="Contents" BORDER=O></A><A HREF="tindex.html"><IMG SRC="images/bindex.gif" WIDTH=56 HEIGHT=21 ALT="Index page" BORDER=O></A><A HREF="IV.html"><IMG SRC="images/bnext.gif" WIDTH=25 HEIGHT=21 ALT="Next file" BORDER=O></A><DIV CLASS="DOCUMENTNAME"><B>Apache C++ Standard Library User's Guide</B></DIV>
<H2>12.3 Example Function: Split a Line into Words</H2>
<A NAME="idx240"><!></A>
<A NAME="idx241"><!></A>
<P>In this section we illustrate the use of some of the <B><I><A HREF="../stdlibref/basic-string.html">string</A></I></B> functions by defining a function to split a line of text into individual words. We have already made use of this function in the concordance example program in <A HREF="9-3.html#933">Section&nbsp;9.3.3</A>.</P>
<BLOCKQUOTE><HR><B>
NOTE -- The split function is in the concordance program in file concord.cpp.
</B><HR></BLOCKQUOTE>
<P>There are three arguments to this function. The first two are <B><I><A HREF="../stdlibref/basic-string.html">string</A></I></B>s, describing the line of text and the separators to be used to differentiate words, respectively. The third argument is a <B><I><A HREF="../stdlibref/list.html">list</A></I></B> of <B><I>string</I></B>s, used to return the individual words in the line.</P>
<UL><PRE>
void split (const std::string&amp; text, const std::string&amp; separators,
std::list&lt;std::string,
std::allocator&lt;std::string&gt; &gt;&amp; words) {
size_t n = text.length ();
size_t start = text.find_first_not_of (separators);
while (start &lt; n) {
size_t stop = text.find_first_of (separators, start);
if (stop &gt; n) stop = n;
words.push_back (text.substr (start, stop-start));
start = text.find_first_not_of (separators, stop+1);
}
}
</PRE></UL>
<P>The program begins by finding <SAMP>start</SAMP>, the index of the first character that is <I>not</I> a separator. The loop then looks for <SAMP>stop</SAMP>, the index of the next character that <I>is</I> a separator, or uses the end of the string if no such value is found. These two indexes delimit a word, which is copied out of the text using a substring operation and inserted into the <B><I><A HREF="../stdlibref/list.html">list</A></I></B> of words. A search is then made to discover the start of the next word, and the loop continues. When the index value exceeds the limits of the <B><I><A HREF="../stdlibref/basic-string.html">string</A></I></B>, execution stops.</P>
<BR>
<HR>
<A HREF="12-2.html"><IMG SRC="images/bprev.gif" WIDTH=20 HEIGHT=21 ALT="Previous file" BORDER=O></A><A HREF="noframes.html"><IMG SRC="images/btop.gif" WIDTH=56 HEIGHT=21 ALT="Top of Document" BORDER=O></A><A HREF="booktoc.html"><IMG SRC="images/btoc.gif" WIDTH=56 HEIGHT=21 ALT="Contents" BORDER=O></A><A HREF="tindex.html"><IMG SRC="images/bindex.gif" WIDTH=56 HEIGHT=21 ALT="Index page" BORDER=O></A><A HREF="IV.html"><IMG SRC="images/bnext.gif" WIDTH=20 HEIGHT=21 ALT="Next file" BORDER=O></A>
<!-- Google Analytics tracking code -->
<script src="http://www.google-analytics.com/urchin.js" type="text/javascript">
</script>
<script type="text/javascript">
_uacct = "UA-1775151-1";
urchinTracker();
</script>
<!-- end of Google Analytics tracking code -->
</BODY>
</HTML>