#include <linux/module.h>
#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/kdev_t.h>
#include <linux/fs.h>
static dev_t first; // Global variable for the first device number
static int __init mfcd_init(void) /* Constructor */
{
    printk(KERN_INFO "Gun: mfcd registered");
    if (alloc_chrdev_region(&first, 0, 3, "Andy") < 0)
    {
        return -1;
    }
    printk(KERN_INFO "<Major, Minor>: <%d, %d>\n", MAJOR(first), MINOR(first));
    return 0;
}
static void __exit mfcd_exit(void) /* Destructor */
{
    unregister_chrdev_region(first, 3);
    printk(KERN_INFO "Gun: mfcd unregistered");
}
module_init(mfcd_init);
module_exit(mfcd_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Gun ");
MODULE_DESCRIPTION("My First Character Driver");