带头结点的单链表head为空的判定条件是()
带头结点的单链表head为空的判定条件是()
A.head= =NULL
B.head->next= =NULL
C.head->next= =head
D.head!=NULL
正确答案:head->next= =NULL
带头结点的单链表head为空的判定条件是()
A.head= =NULL
B.head->next= =NULL
C.head->next= =head
D.head!=NULL
正确答案:head->next= =NULL
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