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		<title>C++ Tutorial/Language Basics/mutable - История изменений</title>
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		<updated>2026-04-06T08:22:44Z</updated>
		<subtitle>История изменений этой страницы в вики</subtitle>
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		<title> в 14:21, 25 мая 2010</title>
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				<updated>2010-05-25T14:21:17Z</updated>
		
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				&lt;td colspan=&quot;1&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Версия 14:21, 25 мая 2010&lt;/td&gt;
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		<id>http://cppe.ru/index.php?title=C%2B%2B_Tutorial/Language_Basics/mutable&amp;diff=2664&amp;oldid=prev</id>
		<title>Admin: 1 версия:&amp;#32;Импорт контента...</title>
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				<updated>2010-05-25T10:30:13Z</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;==Demonstrate mutable.==&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
   &lt;br /&gt;
&amp;lt;source lang=&amp;quot;cpp&amp;quot;&amp;gt;#include &amp;lt;iostream&amp;gt;&lt;br /&gt;
using namespace std;&lt;br /&gt;
class MyClass {&lt;br /&gt;
  mutable int i;&lt;br /&gt;
  int j;&lt;br /&gt;
public:&lt;br /&gt;
  int geti() const {&lt;br /&gt;
    return i; // ok&lt;br /&gt;
  }&lt;br /&gt;
  void seti(int x) const {&lt;br /&gt;
    i = x; // now, OK.&lt;br /&gt;
  }&lt;br /&gt;
/* The following function won&amp;quot;t compile.&lt;br /&gt;
  void setj(int x) const {&lt;br /&gt;
    j = x; // Still Wrong!&lt;br /&gt;
  }&lt;br /&gt;
*/&lt;br /&gt;
};&lt;br /&gt;
int main()&lt;br /&gt;
{&lt;br /&gt;
  MyClass ob;&lt;br /&gt;
  ob.seti(1900);&lt;br /&gt;
  cout &amp;lt;&amp;lt; ob.geti();&lt;br /&gt;
  return 0;&lt;br /&gt;
}&amp;lt;/source&amp;gt;&lt;br /&gt;
&amp;lt;pre class=codeResult&amp;gt;1900&amp;quot;&amp;lt;/pre&amp;gt;&lt;br /&gt;
&lt;br /&gt;
==Demonstrating storage-class specifier mutable==&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
   &lt;br /&gt;
&amp;lt;source lang=&amp;quot;cpp&amp;quot;&amp;gt;#include &amp;lt;iostream&amp;gt;&lt;br /&gt;
using std::cout;&lt;br /&gt;
using std::endl;&lt;br /&gt;
class MyClass {&lt;br /&gt;
public:&lt;br /&gt;
   MyClass( int v )&lt;br /&gt;
   {&lt;br /&gt;
      value = v;&lt;br /&gt;
   }&lt;br /&gt;
   int getValue() const&lt;br /&gt;
   {&lt;br /&gt;
      return value++;&lt;br /&gt;
   }&lt;br /&gt;
private:&lt;br /&gt;
   mutable int value;&lt;br /&gt;
};&lt;br /&gt;
int main()&lt;br /&gt;
{&lt;br /&gt;
   const MyClass test( 99 );&lt;br /&gt;
   cout &amp;lt;&amp;lt; &amp;quot;Initial value: &amp;quot; &amp;lt;&amp;lt; test.getValue();&lt;br /&gt;
   cout &amp;lt;&amp;lt; &amp;quot;\nModified value: &amp;quot; &amp;lt;&amp;lt; test.getValue() &amp;lt;&amp;lt; endl;&lt;br /&gt;
   return 0;&lt;br /&gt;
}&amp;lt;/source&amp;gt;&lt;br /&gt;
&amp;lt;pre class=codeResult&amp;gt;Initial value: 99&lt;br /&gt;
Modified value: 100&amp;lt;/pre&amp;gt;&lt;/div&gt;</summary>
		<author><name>Admin</name></author>	</entry>

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