C ++有可能将对象设置为null吗？ [英] C++ is it possible to set an object to null?

问题描述

进一步在我的代码，我检查看看检查一个对象是null /空。是否有将对象设置为null的方法？

Further in my code, I check to see check if an object is null/empty. Is there a way to set an object to null?

推荐答案

类的对象不能设置为NULL;但是，您可以将一个指针（其中包含对象的内存地址）设置为NULL。

An object of a class cannot be set to NULL; however, you can set a pointer (which contains a memory address of an object) to NULL.

您不能执行的操作示例：

Example of what you can't do which you are asking:

Cat c;
c = NULL;//Compiling error

您可以执行的示例：

Cat c;
//Set p to hold the memory address of the object c
Cat *p = &c;
//Set p to hold NULL
p = NULL;

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