深度为长度为
()略
()表的长度为深度为
()head(tail(head(head(head(tail(tail(tail(tail(A)))))))))
共享结构广义表A=(((bc)d)(a)((a)((bc)d))e())的存储表示
[] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] []