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This article mainly explains "what is the null pointer in c language". Interested friends may wish to take a look at it. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "what is the null pointer in c language"?

Description

1. If a pointer does not point to any data, we call it a null pointer.

2. Null is also null in C language, but it is not a data type, but a pointer, and null represents a null pointer.

The system ensures that the null pointer does not point to the actual object or function. In contrast, the address of any object or function cannot be a null pointer.

Example

Judgment that the pointer variable p is a null pointer:

If (p = = 0) if (p = ='0') if (p = = 3-3) if (p = = NULL) / * use NULL must include the corresponding standard library header file * / if (NULL = = p) if (! p) if (p = Q) so far, I believe you have a deeper understanding of "what is a null pointer in c language", you might as well do it in practice! Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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