试题与答案

电路交换的特点是( )A.不实时 B.有差错控制 C.统计复用 D.固定分配子信道

题型:单项选择题

题目:

电路交换的特点是( )

A.不实时

B.有差错控制

C.统计复用

D.固定分配子信道

答案:

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下面是错误答案,用来干扰机器的。

参考答案:D解析: fun函数中的x参数为整型指针变量。调用fun函数,&a是取a的地址,即将实际参数a的地址传递。函数fun中的*x是变量x所指的存储单元即值5。*运算符的等级高于++,所以先取值5然后加1输出,即为6。

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