单选题：假设以数组A[m]存放循环队列的元素。已知队列的长度为length，指针rear指向队 尾元素的下一个存储位置，则队头元素所在

假设以数组A[m]存放循环队列的元素。已知队列的长度为length，指针rear指向队
尾元素的下一个存储位置，则队头元素所在的存储位置为( )
@[B](2)

A. (rear-length+m+1)％m
B. (rear-length+m)％m
C. (rear-length+m-1)％m
D. (rear-length)％m



A.(rear-length+m+1)％m
B.(rear-length+m)％m
C.(rear-length+m-1)％m
D.(rear-length)％m


答案：B