Write an application to print x and y co-ordinate on 7 segment after touch....

#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <linux/input.h>

#define  NODE_EXP                          "/dev/7seg_led"  /* Device name */
#define  SEG_7_LED_ON                  1  
#define  SEG_7_LED_WRITE            2
#define  SEG_7_LED_CLEAR           3
#define  SEG_7_LED_OFF                4

int main()
{
    int fd;
    char buff[256] = "Name";
    int i,rb,m;
    int exp_dev= 0; /* exp_dev is file descriptor */
    int ret,res= 0;  /* return value of system call */
    struct input_event ev;
    struct input_absinfo ab;   //absolute info//
    if ((fd = open("/dev/input/touchscreen0", O_RDONLY)) < 0)
    {
     printf ("Error Opening the Device\n");
     return 1;
    }
      ioctl(fd, EVIOCGNAME(sizeof(buff)), buff);
      printf("Touch Input device name: \"%s\"\n", buff);
     /* ******************Print message on 7seg starting function ************** */
    /* open as blocking mode */
    exp_dev = open(NODE_EXP, O_RDWR);     
    if (exp_dev < 0)
    {
    fprintf(stderr, "Open error: %s\n", NODE_EXP);
    return 1;
    }

   if (res=ioctl(exp_dev,SEG_7_LED_ON, NULL) < 0 )     
   {
    printf("%d---> Error in switching OFF the LED \r\n",res);
    getchar();
    close(exp_dev);
    return 1;
   }
          
    /* ******************Print message on 7seg starting function ************** */ 

    for (i = 0; i < 5; i++)
    {
     rb=read(fd,&ev,sizeof(struct input_event));
     printf ("After read\n");
    if ((ev.type == 1) && (ev.code == 330))
        {
     printf ("Touch Event = %d\n",ev.code);
     }
    if ((ev.type == 3) && (ev.code == 0))
        {
     printf ("X Value  = %d\n",ev.value);
     printf ("X Value...  = %d\n",ev.value/24);
     m=ev.value/24;
     printf ("X  Value  = %x\n",m);
    if (res=ioctl(exp_dev,SEG_7_LED_WRITE, m) < 0 )
    {
     printf("%d---> Error in writing to the 7-Seg LED \r\n",res);
     getchar();
     close(exp_dev);
     return 1;
     }
         }
    if ((ev.type == 3) && (ev.code == 1))
        {
         printf ("Y Value  = %d\n",ev.value);
        }
    if ((ev.type == 3) && (ev.code == 24))
        {
         printf ("Touch Pressure  = %d\n",ev.value);
        }
    }
    /* *******************Print message on 7seg closing function *************** */
        printf ("Press any key to exit from the program\n");
        getchar();
        if (res=ioctl(exp_dev,SEG_7_LED_CLEAR, NULL) < 0 )
        {
         printf("%d---> Error in Clearing the LED \r\n",res);
         getchar();
         close(exp_dev);
          return 1;
          }
         if (ioctl(exp_dev,SEG_7_LED_OFF, NULL) < 0 )
          {
           printf("Error in switching OFF the LED \r\n");
           getchar();
           close(exp_dev);
           return 1;
           }
              close(exp_dev);
     /* *******************Print message on 7seg closing function *************** */
    return 0;
}