悬空指针可能发生在以微妙方式使用内存的代码中。
Dangling Pointers are likely to arise in code, which USES memory in subtle ways.
在非垃圾收集语言中需要避免两个主要的内存管理危险：内存泄漏和悬空指针。
There are two major memory-management hazards to avoid in non-garbage-collected languages: memory leaks and dangling Pointers.
为了避免悬空指针(一种危险的情况，即一块内存已经被释放了，而一个指针还在引用它)，必须在最后的引用释放之后才删除对象。
To avoid dangling Pointers (the dangerous situation where a block of memory is freed but a pointer still references it), you must delete the object only after the last reference is released.
为了避免悬空指针(一种危险的情况，即一块内存已经被释放了，而一个指针还在引用它)，必须在最后的引用释放之后才删除对象。
To avoid dangling Pointers (the dangerous situation where a block of memory is freed but a pointer still references it), you must delete the object only after the last reference is released.
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