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		<title>C++ Tutorial/Operator Overloading/overload cast operator - История изменений</title>
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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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		<title>Admin: 1 версия:&amp;#32;Импорт контента...</title>
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				<updated>2010-05-25T10:30:39Z</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;==double cast operator==&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 Power {&lt;br /&gt;
  double b;&lt;br /&gt;
  int e;&lt;br /&gt;
  double val;&lt;br /&gt;
public:&lt;br /&gt;
    Power(double base, int exp)&lt;br /&gt;
    {&lt;br /&gt;
      b = base;&lt;br /&gt;
      e = exp;&lt;br /&gt;
      val = 1;&lt;br /&gt;
      if(exp==0)&lt;br /&gt;
         return;&lt;br /&gt;
      for( ; exp&amp;gt;0; exp--)&lt;br /&gt;
         val = val * b;&lt;br /&gt;
    }&lt;br /&gt;
  Power operator+(Power o) {&lt;br /&gt;
    double base;&lt;br /&gt;
    int exp;&lt;br /&gt;
    base = b + o.b;&lt;br /&gt;
    exp = e + o.e;&lt;br /&gt;
    Power temp(base, exp);&lt;br /&gt;
    return temp;&lt;br /&gt;
  }&lt;br /&gt;
  operator double() { return val; } // convert to double&lt;br /&gt;
};&lt;br /&gt;
int main() {&lt;br /&gt;
  Power x(4.0, 2);&lt;br /&gt;
  double a;&lt;br /&gt;
  a = x;             // convert to double&lt;br /&gt;
  cout &amp;lt;&amp;lt; x + 1.2; // convert x to double and add 100.2&lt;br /&gt;
  cout &amp;lt;&amp;lt; &amp;quot;\n&amp;quot;;&lt;br /&gt;
  Power y(3.3, 3), z(0, 0);&lt;br /&gt;
  z = x + y;  // no conversion&lt;br /&gt;
  a = z;      // convert to double&lt;br /&gt;
  cout &amp;lt;&amp;lt; a;&lt;br /&gt;
  return 0;&lt;br /&gt;
}&amp;lt;/source&amp;gt;&lt;br /&gt;
&amp;lt;pre class=codeResult&amp;gt;17.2&lt;br /&gt;
20730.7&amp;quot;&amp;lt;/pre&amp;gt;&lt;/div&gt;</summary>
		<author><name>Admin</name></author>	</entry>

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