※ 引述《aoc90058 (我是新警察Orz...)》之銘言：
: in Expressions 5:4: 'Between the previous and next sequence point a scalar
: object shall have its stored value modified at most once by the evaluation of
: an expression. Furthermore, the prior value shall be accessed only to
: determine the value to be stored.'
: But fortunately, there's a simple way to avoid it: Never write code that does
: things it shouldn't do between sequence points, like try to write into the
: same int, or other built-in scalar value, more than once in the same
: expression."
f(i++, i);-> undefined /* 沒什麼人會這樣搞自己 */
a[i++] = i;-> undefeind /*常有人這樣寫*/
都錯在 "Furthermore, the prior value shall be accessed only to dterminie
the value to be stored (i)"
同理 p = z++ + z;-> undefined. /* @@ 考題 */
第二個 z 不是用來存 z
*q++ = *p++ -> defined.
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