WAP Using C to Write and Read in a File

//Wap to write emp id, name and address on "emp.dat" file and read it.
#include
#include
#include 
int main ()
{
//Create a file pointer
  FILE *fp;
  int id;
  char name[20];
  char add[20];
  //Open a file
  fp = fopen ("emp.dat", "w");
  printf ("Enter name: ");
  scanf ("%s", name);
  printf ("Enter address: ");
  scanf ("%s", add);
  printf ("Enter id: ");
  scanf ("%d", &id);
  //write data into file
  fprintf (fp, "%s\n%s\n%d\n", name, add, id);
  //close the file
  fclose (fp);
  fp = fopen ("emp.dat", "r");
  //check if the file exists or not
  if (fp == NULL)
    {
      printf ("Unable to find");
      exit (1);

    }
    //if file exists runs the code below if it doesn't exist then code stops.
  else
    {
//While loop to stop the code once it reaches the End of the file.
      while (fscanf (fp, "%s\n%s\n%d\n", name, add, &id) != EOF)
	{
	  printf ("Enter name: ");
	  scanf ("%s", name);
	  printf ("Enter address: ");
	  scanf ("%s", add);
	  printf ("Enter id: ");
	  scanf ("%d", &id);
	}

    }
    //close again
  fclose (fp);
  return 0;
}