Example using E32Main()

A simple example using E32Main() as an entry point is described below. The example writes a text to a file.

• Modify the MMP file as mentioned earlier.

• Create a trap handler using CTrapCleanup.

• Call the method within TRAPD.

• Delete the trap handler.

#include <stdio.h>
#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
    }