How to use delete to delete a null object in C++?

In C++, deleting empty objects is pointless because empty objects do not occupy memory space. In fact, an empty object is a concept at the compiler/language level, indicating that the object does not actually exist.

If you want to delete a pointer that points to an object, you can use the delete operator. However, before deleting, you should set the pointer to nullptr to ensure there are no issues with dangling pointers. Example is as follows:

MyClass* ptr = nullptr;  // 将指针置为空对象
delete ptr;              // 删除空对象，不会有任何作用

In conclusion, empty objects do not need to be deleted in C++ because they don’t exist. Only pointers to objects need to be deleted.