📄 swa_1153.htm

📁 ARM编辑、编译软件
💻 HTM
字号:
<HTML><TITLE>swap_ranges</TITLE><BODY>
<A HREF="ref.htm"><IMG SRC="images/banner.gif"></A>
<P><STRONG>Click on the banner to return to the Class Reference home page.</STRONG></P>
<P>&copy;Copyright 1996 Rogue Wave Software</P>
<H2>swap_ranges</H2>
<HR><PRE>     Algorithm</PRE><HR>
<A NAME="Summary"><H3>Summary</H3></A>
<P>Exchange a range of values in one location with those in another</P>
<PRE></PRE>
<H3>Contents</H3>
<UL>
<A HREF="#Synopsis"><LI>Synopsis</LI></A>
<A HREF="#Description"><LI>Description</LI></A>
<A HREF="#Example"><LI>Example</LI></A>
<A HREF="#Warning"><LI>Warning</LI></A>
<A HREF="#See Also"><LI>See Also</LI></A>
</UL>
<A NAME="Synopsis"><H3>Synopsis</H3></A>
<PRE>#include &#60;algorithm></PRE>
<PRE>
template &#60;class ForwardIterator1, class ForwardIterator2>
ForwardIterator2 <B>swap_ranges </B>(ForwardIterator1 first1,
                              ForwardIterator1 last1,
                              ForwardIterator2 first2);</PRE>
<A NAME="Description"><H3>Description</H3></A>
<P>The <B><I>swap_ranges</B></I> algorithm exchanges corresponding values in two ranges, in the following manner:</P>
<P>For each non-negative integer <SAMP>n &#60; (last - first)</SAMP> the function exchanges <SAMP>*(first1 + n)</SAMP> with <SAMP>*(first2 + n))</SAMP>.  After completing all exchanges, <B><I>swap_ranges</B></I> returns an iterator that points to the end of the second container, i.e., <SAMP>first2 + (last1 -first1)</SAMP>.  The result of <B><I>swap_ranges</B></I> is undefined if the two ranges <SAMP>[first, last)</SAMP> and <SAMP>[first2, first2 + (last1 - first1))</SAMP> overlap. </P>
<A NAME="Example"><H3>Example</H3></A>
<PRE>//
// swap.cpp
//
 #include &#60;vector>
 #include &#60;algorithm>
 int main()
 {
   int d1[] = {6, 7, 8, 9, 10, 1, 2, 3, 4, 5};
   // Set up a vector
   vector&#60;int> v(d1,d1 + 10);
   // Output original vector
   cout &#60;&#60; "For the vector: ";
   copy(v.begin(),v.end(),ostream_iterator&#60;int>(cout," "));
   // Swap the first five elements with the last five elements
<B>   swap_ranges</B>(v.begin(),v.begin()+5, v.begin()+5);
   // Output result
   cout &#60;&#60; endl &#60;&#60; endl
        &#60;&#60; "Swapping the first five elements "
        &#60;&#60; "with the last five gives: "
        &#60;&#60; endl &#60;&#60; "     ";
   copy(v.begin(),v.end(),ostream_iterator&#60;int>(cout," "));
   return 0;
 }
Output :
For the vector: 6 7 8 9 10 1 2 3 4 5
Swaping the first five elements with the last five gives:
     1 2 3 4 5 6 7 8 9 10
Swaping the first and last elements gives:
     10 2 3 4 5 6 7 8 9 1</PRE>
<A NAME="Warning"><H3>Warning</H3></A>
<P>If your compiler does not support default template parameters, you need to always supply the <SAMP>Allocator</SAMP> template argument. For instance, you will need to write :</P>
<P><SAMP>vector&#60;int, allocator></SAMP></P>
<P>instead of :</P>
<P><SAMP>vector&#60;int></SAMP></P>
<A NAME="See Also"><H3>See Also</H3></A>
<P><A HREF="ite_4254.htm"><B><I>iter_swap</B></I></A>, <A HREF="swa_4514.htm"><B><I>swap</B></I></A> </P>
<HR>
<A HREF="swa_4514.htm"><IMG SRC="images/prev.gif"></A> <A HREF="ref.htm#contents"><IMG SRC="images/toc.gif"></A> <A HREF="tim_4491.htm"><IMG SRC="images/next.gif"></A></BODY></HTML>
⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -