interaction_dump (const struct interaction *i)
{
int v = 0;
- printf ("%s", var_get_name (i->vars[v]));
- for (v = 1; v < i->n_vars; ++v)
+ if ( i->n_vars == 0)
{
- printf (" * %s", var_get_name (i->vars[v]));
+ printf ("(empty)\n");
+ return;
}
+ printf ("%s", var_get_name (i->vars[v]));
+ for (v = 1; v < i->n_vars; ++v)
+ printf (" * %s", var_get_name (i->vars[v]));
printf ("\n");
}