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This article mainly introduces the relevant knowledge of "what is the concept of multi-level pointer in c language". The editor shows you the operation process through an actual case, and the operation method is simple, fast and practical. I hope this article "what is the concept of multi-level pointer in c language" can help you solve the problem.

Multistage pointer

If the pointer variable p points to the variable Q, and the variable Q is not a pointer variable, then the variable p is called a first-order pointer variable. If the pointer variable s points to the first-level pointer variable Q, that is, the value of the pointer variable s is the address of a first-level pointer variable, it is called a second-level pointer variable. And so on, you can define multi-level pointer variables.

In theory, three-level, four-level or even more multi-level pointer variables can be used in the program, but in practical application, the first-level and second-level pointer variables are widely used. The second-level pointer variable is taken as an example to illustrate the usage of multi-level pointer.

General form of secondary pointer variable definition:

Type specifier * * pointer variable name

Description:

(1) the "*" in the secondary pointer variable definition is not part of the variable name, but only indicates that the secondary pointer variable is defined.

(2) the pointer operation and operation described in the previous article are equally effective for secondary pointers.

For example:

Int * * pjingheq dwelling 10

QQ _ roomd

PacificQ

After the execution of the above three statements, the storage relationship of the variable pcentine qdir d is shown in the following figure.

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