A.用for循环
B.用foreach循环
C.用while循环
D.用do...while循环
以下哪些是C语言程序的条件控制指令?( )
(A) for指令 (B) case指令 (C) do...while指令 (D) if-else指令
如图2-14所示的电路,试用do...while循环结构编写一段程序,当P30闭合时,P1口的LED0~LED7闪烁,当P30断开时,P1口的LED0~LED7全灭。
A. While crossing the street
B. While the boy was crossing thestreet
C. While crossed the street
D. While crosses the street