(1),设ä¸æ å¿,
(2),1mså®æ¶å¨ä¸æ
(3),ä¸æé:
æ å¿ä¸º1,å°±å°è®¡æ°å¨1çå¼å 1,并æ£æµ,å¦ä¸º21就令P1.0为0,æ å¿ä¸º0.并å°é¤è®¡æ°å¨1çå¼ä¸º 0.
æ å¿ä¸º0,å°±å°è®¡æ°å¨2çå¼å 1,并æ£æµ,å¦ä¸º16就令P1.0为1,æ å¿ä¸º1.并å°é¤è®¡æ°å¨2çå¼ä¸º 0.
温馨提示:答案为网友推荐,仅供参考