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/*
* Determine if the sky is blue by checking that it isn't night.
* CAVEAT: Only sometimes right.May return TRUE when the answer
* is FALSE.Consider clouds, eclipses, short days.
* NOTE: Uses 'hour' from 'hightime.c'.Returns 'int' for
* compatibility with the old version.
*/
int/* true or false */
skyblue()
{
extern inthour;
/* current hour of the day */return (hour >= MORNING && hour <= EVENING);
}/*
* Find the last element in the linked list
* pointed to by nodep and return a pointer to it.
* Return NULL if there is no last element.
*/
node_t *
tail(nodep)
node_t*nodep;
/* pointer to head of list */
{
register node_t *np;
/* advances to NULL */
register node_t *lp;
/* follows one behind np */if (nodep == NULL)
return (NULL);
for (np = lp = nodep;
np != NULL;
lp = np, np = np->next)
;
/* VOID */
return (lp);
}
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