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		<title>C++ Tutorial/Development/Macro Expansion - История изменений</title>
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		<id>http://cppe.ru/index.php?title=C%2B%2B_Tutorial/Development/Macro_Expansion&amp;diff=2109&amp;oldid=prev</id>
		<title> в 14:21, 25 мая 2010</title>
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				<updated>2010-05-25T14:21:17Z</updated>
		
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		<id>http://cppe.ru/index.php?title=C%2B%2B_Tutorial/Development/Macro_Expansion&amp;diff=2110&amp;oldid=prev</id>
		<title>Admin: 1 версия:&amp;#32;Импорт контента...</title>
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				<updated>2010-05-25T10:28:52Z</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;==function macro==&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;
#define getmax(a,b) ((a)&amp;gt;(b)?(a):(b))&lt;br /&gt;
int main()&lt;br /&gt;
{&lt;br /&gt;
  int x=5, y;&lt;br /&gt;
  y= getmax(x,2);&lt;br /&gt;
  cout &amp;lt;&amp;lt; y &amp;lt;&amp;lt; endl;&lt;br /&gt;
  cout &amp;lt;&amp;lt; getmax(7,x) &amp;lt;&amp;lt; endl;&lt;br /&gt;
  return 0;&lt;br /&gt;
}&amp;lt;/source&amp;gt;&lt;br /&gt;
&lt;br /&gt;
==Macro Expansion==&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;
 &lt;br /&gt;
 #define CUBE(a) ( (a) * (a) * (a) )&lt;br /&gt;
 #define THREE(a) a * a * a&lt;br /&gt;
 &lt;br /&gt;
 int main()&lt;br /&gt;
 {&lt;br /&gt;
     long x = 5;&lt;br /&gt;
     long y = CUBE(x);&lt;br /&gt;
     long z = THREE(x);&lt;br /&gt;
 &lt;br /&gt;
     std::cout &amp;lt;&amp;lt; &amp;quot;y: &amp;quot; &amp;lt;&amp;lt; y &amp;lt;&amp;lt; std::endl;&lt;br /&gt;
     std::cout &amp;lt;&amp;lt; &amp;quot;z: &amp;quot; &amp;lt;&amp;lt; z &amp;lt;&amp;lt; std::endl;&lt;br /&gt;
 &lt;br /&gt;
     long a = 5, b = 7;&lt;br /&gt;
     y = CUBE(a+b);&lt;br /&gt;
     z = THREE(a+b);&lt;br /&gt;
 &lt;br /&gt;
     std::cout &amp;lt;&amp;lt; &amp;quot;y: &amp;quot; &amp;lt;&amp;lt; y &amp;lt;&amp;lt; std::endl;&lt;br /&gt;
     std::cout &amp;lt;&amp;lt; &amp;quot;z: &amp;quot; &amp;lt;&amp;lt; z &amp;lt;&amp;lt; std::endl;&lt;br /&gt;
     return 0;&lt;br /&gt;
 }&amp;lt;/source&amp;gt;&lt;br /&gt;
&amp;lt;pre class=codeResult&amp;gt;y: 125&lt;br /&gt;
z: 125&lt;br /&gt;
y: 1728&lt;br /&gt;
z: 82&amp;lt;/pre&amp;gt;&lt;br /&gt;
&lt;br /&gt;
==standard macro names: __LINE__, __DATE__, __cplusplus==&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;
int main()&lt;br /&gt;
{&lt;br /&gt;
  cout &amp;lt;&amp;lt; &amp;quot;This is the line number &amp;quot; &amp;lt;&amp;lt; __LINE__;&lt;br /&gt;
  cout &amp;lt;&amp;lt; &amp;quot; of file &amp;quot; &amp;lt;&amp;lt; __FILE__ &amp;lt;&amp;lt; &amp;quot;.\n&amp;quot;;&lt;br /&gt;
  cout &amp;lt;&amp;lt; &amp;quot;Its compilation began &amp;quot; &amp;lt;&amp;lt; __DATE__;&lt;br /&gt;
  cout &amp;lt;&amp;lt; &amp;quot; at &amp;quot; &amp;lt;&amp;lt; __TIME__ &amp;lt;&amp;lt; &amp;quot;.\n&amp;quot;;&lt;br /&gt;
  cout &amp;lt;&amp;lt; &amp;quot;The compiler gives a __cplusplus value of &amp;quot; &amp;lt;&amp;lt; __cplusplus;&lt;br /&gt;
  return 0;&lt;br /&gt;
}&amp;lt;/source&amp;gt;&lt;/div&gt;</summary>
		<author><name>Admin</name></author>	</entry>

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