连续执行代码两次，第二次执行会显示“ No such file or directory ”，这证明共享内存已经被删除了。

Execute the code twice in succession. The second run prints the line "No such file or directory," confirming that the Shared memory has been deleted.

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编辑过的行和与删除行邻近的行会被标记出来。

Lines that have been edited or lines adjacent to deleted lines are marked.

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