/*
 * palindrome returns true if the argument string contains the same sequence
 * of characters backwards as it does forwards.
 */
int palindrome(char *s)
{
    char *t;

    /* find end of string */
    for (t = s; *t; t++)
	;

    while (s < t)
	if (*s++ != *--t)
	    return 0;
    return 1;
}