单项选择题
A. 8,2,3,4,5,6,7,1, B. 5,6,7,8,1,2,3,4, C. 1,2,3,4,5,6,7,8, D. 8,7,6,5,4,3,2,1,
A. 3 B. 4 C. 5 D. 6
A. '\0' B. '0' C. 不确定的值 D. '0'的地址