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<title>15.2 stdio file buffers</title>

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<h2>
  <a name="1214134"> </a><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">15.2 	 stdio file buffers</font>
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<p>
  <a name="1214135"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">When a <font size=2 face=Courier><strong>stdio</strong></font> function is used in an application, a 4燢bytes buffer is provided for <font size=2 face=Courier><strong>stdin</strong></font> and <font size=2 face=Courier><strong>stdout</strong></font>. The size of the buffer is defined in <font size=2 face=Courier><strong>stdio.h</strong></font> (<font size=2 face=Courier><strong>BUFSIZ</strong></font>), but can be changed, if required, to free up the amount of memory available.</font>
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<p>
  <a name="1205035"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">The following example can be used to release the <font size=2 face=Courier><strong>stdin</strong></font> buffer and set the <font size=2 face=Courier><strong>stdout</strong></font> buffer to 256燽ytes. This reduces the total buffer size from 8燢bytes to 256燽ytes.</font>
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<a name="1205036"> </a><font size=2 face=Courier><strong>#include &lt;stdio.h&gt;<br><br></strong></font>



<a name="1205037"> </a><font size=2 face=Courier><strong>#if !defined(STDIO_BUFSIZ)<br>#define STDIO_BUFSIZ 256<br>#endif<br><br></strong></font>



<a name="1205039"> </a><font size=2 face=Courier><strong>int main(void)<br>{<br>

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