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This article mainly explains "what the second-level pointer of c language refers to". The content of the explanation in this article is simple and clear, and it is easy to learn and understand. let's study and learn what the second-level pointer of c language refers to.

Description

1. The secondary pointer is actually the pointer to the pointer, and the pointer to the pointer is in the form of multi-level indirect addressing or pointer chain.

Three-level or N-level pointers can also be established, but generally can not use multi-level pointers, only secondary pointers need to be used in some cases.

2. The two-dimensional pointer is mainly used for the newly generated variables in the subfunction and needs to return the main function.

Example

# include int main () {int one = 10 one / this is a variable one int * two=&one;// variable preceded by an asterisk and its value is & one,&one indicates the address of the variable one in memory, and then * two points to the address of the variable one, which is equivalent to the variable two is the value of one int * * three=&two / / the variable three is preceded by two asterisks and its value is & two,&two indicates the in-memory address of the value of the variable two, and then * * three points to the address of the variable two, which is equivalent to the variable three is the value of two int * four=&three / / the variable four is preceded by three asterisks and its value is & three,&three indicates the in-memory address of the value of the variable three, and then the address of the four pointing to the variable three is equivalent to the value of the variable four is the value of three ("% d", * four); / / the last output here is the value of the variable one. Return 0;} Thank you for your reading. The above is the content of "what does the second-level pointer of language c refer to". After the study of this article, I believe you have a deeper understanding of what the second-level pointer of language c refers to, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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