1 <?xml version="1.0" encoding="utf-8"?>

     2 <!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->

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     4 "Eclipse Public License v1.0" which accompanies this distribution, 

     5 and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->

     6 <!-- Initial Contributors:

     7     Nokia Corporation - initial contribution.

     8 Contributors: 

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    10 <!DOCTYPE concept

    11   PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">

    12 <concept id="GUID-788031A5-75C1-420E-9E2B-71E09FF08ADF" xml:lang="en"><title>Example

    13 using <codeph>E32Main()</codeph></title><shortdesc/><prolog><metadata><keywords/></metadata></prolog><conbody>

    14 <p>A simple example using <codeph>E32Main()</codeph> as an entry point is

    15 described below. The example writes a text to a file. </p>

    16 <ul>

    17 <li><p>Modify the MMP file as mentioned earlier.</p></li>

    18 <li><p>Create a trap handler using <xref href="GUID-17AC7BAD-1C03-3729-BCC6-F5B28B32E99D.dita"><apiname>CTrapCleanup</apiname></xref>.</p></li>

    19 <li><p>Call the method within <codeph>TRAPD</codeph>.</p></li>

    20 <li><p>Delete the trap handler. </p></li>

    21 </ul>

    22 <codeblock xml:space="preserve">#include &lt;stdio.h&gt;

    23 #include <string.h>

    24 #include <e32base.h>

    25 

    26 void doExampleL(void)

    27 {

    28     FILE* fd;

    29     char* fileName = "C:\\test.txt";

    30     char *buf = "Hello world from E32Main()";

    31     fd = fopen(fileName, "w");

    32     if (fd == NULL)

    33     {

    34         printf("Unable to open the file (%s)", fileName);

    35         return;

    36     }

    37     if (fwrite(buf, sizeof(char), strlen(buf), fd) < 0 )

    38     {

    39         perror("write fails.");

    40     }

    41     fclose(fd);

    42 }

    43 

    44 GLDEF_C TInt E32Main()

    45     {

    46     CTrapCleanup* cleanup=CTrapCleanup::New();

    47     TRAPD(error,doExampleL());

    48     delete cleanup; // destroy cleanup stack

    49     return 0; // and return

    50     }

    51 </codeblock>

    52 </conbody></concept>