顺序循环队列基本操作 任意输入队列长度和队列中的元素值，构造一个队列，对其进行清空、插入新元素、返回队头元素以及删除队头元素操作。-Basic operation of the order of any circular queue length and queue input queue element values, construct a queue, its empty, insert a new element to the first team to return the fir