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		<title>C++/STL Algorithms Modifying sequence operations/copy backward - История изменений</title>
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		<updated>2026-04-19T07:16:02Z</updated>
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		<title> в 14:21, 25 мая 2010</title>
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				<updated>2010-05-25T14:21:06Z</updated>
		
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		<id>http://www.cppe.ru/index.php?title=C%2B%2B/STL_Algorithms_Modifying_sequence_operations/copy_backward&amp;diff=1948&amp;oldid=prev</id>
		<title>Admin: 1 версия:&amp;#32;Импорт контента...</title>
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				<updated>2010-05-25T10:28:14Z</updated>
		
		<summary type="html">&lt;p&gt;1 версия: Импорт контента...&lt;/p&gt;
&lt;p&gt;&lt;b&gt;Новая страница&lt;/b&gt;&lt;/p&gt;&lt;div&gt;==Use std::copy_backward to place elements in one vector into another vector in reverse order==&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
   &lt;br /&gt;
&amp;lt;source lang=&amp;quot;cpp&amp;quot;&amp;gt; &lt;br /&gt;
 &lt;br /&gt;
#include &amp;lt;iostream&amp;gt;&lt;br /&gt;
using std::cout;&lt;br /&gt;
using std::endl;&lt;br /&gt;
#include &amp;lt;algorithm&amp;gt;&lt;br /&gt;
#include &amp;lt;vector&amp;gt;&lt;br /&gt;
#include &amp;lt;iterator&amp;gt;&lt;br /&gt;
int main()&lt;br /&gt;
{&lt;br /&gt;
   int a1[ 5 ] = { 1, 3, 5, 7, 9 };&lt;br /&gt;
   int a2[ 5 ] = { 2, 4, 5, 7, 9 };&lt;br /&gt;
   &lt;br /&gt;
   std::vector&amp;lt; int &amp;gt; v1( a1, a1 + 5 );&lt;br /&gt;
   std::vector&amp;lt; int &amp;gt; v2( a2, a2 + 5 );&lt;br /&gt;
   &lt;br /&gt;
   std::ostream_iterator&amp;lt; int &amp;gt; output( cout, &amp;quot; &amp;quot; );&lt;br /&gt;
   std::copy( v1.begin(), v1.end(), output ); // display vector output&lt;br /&gt;
   std::copy( v2.begin(), v2.end(), output ); // display vector output&lt;br /&gt;
   std::vector&amp;lt; int &amp;gt; results( v1.size() );&lt;br /&gt;
   // place elements of v1 into results in reverse order&lt;br /&gt;
   std::copy_backward( v1.begin(), v1.end(), results.end() );&lt;br /&gt;
   cout &amp;lt;&amp;lt; &amp;quot;\n\nAfter copy_backward, results contains: &amp;quot;;&lt;br /&gt;
   std::copy( results.begin(), results.end(), output );&lt;br /&gt;
   &lt;br /&gt;
   cout &amp;lt;&amp;lt; endl;&lt;br /&gt;
   return 0;&lt;br /&gt;
}&lt;br /&gt;
&lt;br /&gt;
/*&lt;br /&gt;
1 3 5 7 9 2 4 5 7 9&lt;br /&gt;
After copy_backward, results contains: 1 3 5 7 9&lt;br /&gt;
*/        &lt;br /&gt;
  &amp;lt;/source&amp;gt;&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==Use the copy_backward algorithms: Shift it right by 2 positions==&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
   &lt;br /&gt;
&amp;lt;source lang=&amp;quot;cpp&amp;quot;&amp;gt; &lt;br /&gt;
 &lt;br /&gt;
#include &amp;lt;iostream&amp;gt;&lt;br /&gt;
#include &amp;lt;cassert&amp;gt;&lt;br /&gt;
#include &amp;lt;algorithm&amp;gt;&lt;br /&gt;
#include &amp;lt;vector&amp;gt;&lt;br /&gt;
#include &amp;lt;string&amp;gt;&lt;br /&gt;
#include &amp;lt;iostream&amp;gt;&lt;br /&gt;
using namespace std;&lt;br /&gt;
int main()&lt;br /&gt;
{&lt;br /&gt;
  string s(&amp;quot;abcdefghihklmnopqrstuvwxyz&amp;quot;);&lt;br /&gt;
  vector&amp;lt;char&amp;gt; vector1(s.begin(), s.end());&lt;br /&gt;
  copy_backward(vector1.begin(), vector1.end() - 2, vector1.end());&lt;br /&gt;
  vector&amp;lt;char&amp;gt;::iterator pos;&lt;br /&gt;
  for (pos=vector1.begin(); pos!=vector1.end(); ++pos) {&lt;br /&gt;
        cout &amp;lt;&amp;lt; *pos &amp;lt;&amp;lt; &amp;quot; &amp;quot;;&lt;br /&gt;
  }&lt;br /&gt;
  return 0;&lt;br /&gt;
}&lt;br /&gt;
/* &lt;br /&gt;
a b a b c d e f g h i h k l m n o p q r s t u v w x &lt;br /&gt;
 */&lt;br /&gt;
  &amp;lt;/source&amp;gt;&lt;/div&gt;</summary>
		<author><name>Admin</name></author>	</entry>

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