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

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

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

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

<ul>

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

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

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

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

</ul>

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

#include <string.h>

#include <e32base.h>

void doExampleL(void)

{

    FILE* fd;

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

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

    fd = fopen(fileName, "w");

    if (fd == NULL)

    {

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

        return;

    }

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

    {

        perror("write fails.");

    }

    fclose(fd);

}

GLDEF_C TInt E32Main()

    {

    CTrapCleanup* cleanup=CTrapCleanup::New();

    TRAPD(error,doExampleL());

    delete cleanup; // destroy cleanup stack

    return 0; // and return

    }

</codeblock>

</conbody></concept>