konversi ke detk

/*program konversi_ke_detik*/

#include <stdio.h>
main ()
{
typedef struct {long int hh; long int mm; long int ss;}jam;
jam J;
        long int TotalDetik;
        printf ("jam: "); scanf ("%ld", &J.hh);
printf ("menit: "); scanf ("%ld", &J.mm);
  /*("\ n \ n ================================== ======= \ n ")*/
  /*("\  \ triyono \ n \ http://triyonosiak.blogspot.com/           \ n")*/
 /* ("\ n \ n ================================== ======= \ n ")*/
       printf ("detik: "); scanf ("%ld", &J.ss);
      TotalDetik = (J.hh*3600) + (J.mm*60) + J.ss;
      printf ("Total detik = %ld", TotalDetik);
}