#include #include #include #include void usage (char *commande) { printf ("usage : %s entier_positif", commande); exit (EXIT_FAILURE); } unsigned long fibonacci (unsigned long n) { return 1; } int main (int argc, char *argv[]) { if (argc != 2) usage (argv[0]); printf ("%lu\n", fibonacci (strtoul (argv[1], NULL, 10))); return EXIT_SUCCESS; }