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9年前关闭。
如果您有一个object1和一个指向object2的指针，并且我们当前在Object 2中，那么我们可以从object2到达object1吗？如何？
9年前关闭。
如果您有一个object1和一个指向object2的指针，并且我们当前在Object 2中，那么我们可以从object2到达object1吗？如何？
(OBJECT1) --------> (OBJECT2)
we are here and we don't know where/what OBJECT1 is
最佳答案
否。假设您有几个指向OBJECT2的指针
(POINTER1)------------\
(POINTER2)-------------\
(POINTER3)-------------->(OBJECT2)
..... -------------/
(POINTERN)------------/
当您“上去”时，应该指向哪个指针？