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带头结点的单向链表的头指针为head，该链表为空的判定条件是（）的值为真。

A、head==NULL

B、head->next==head

C、head->next==NULL

D、head==head->next

时间：2022-01-12 23:40 关键词：国家开放大学(数据结构) CMS专题本科计算机科学与技术

答案解析

C

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