#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
int main (int argc, char * argv[], char * envp[])
{ 
  assert (argc == 2);
  //if (argc != 2) {fprintf (stderr, "\nSyntaxe : %s <chaine> \n\n", argv[0]); exit (1); }

  printf ("\nhello %s\n\n", argv[1]);
}