C-language double pointer in-depth understanding

K->[SSS]------>k is a pointer to the memory area, the memory area of the data is SSS, then *k is the content of SSS (*K) <==>sss

SSS->[HHH]---->SSS is a new address, is a pointer to the memory area, the memory area of the data is HHH, then the *sss content is HHH (*sss) <==>hhh

In summary, the double pointer (* (*K)) =====> is equal to HHH

That is, take the contents of the K address as a new address, and then fetch the contents of this new address

2, thinking linked list

Actually, it's like the list.

typedef struct NODE

{

int num;

Node*point;

};

struct node * head;

int num1=5;

int num2=6;

int num3=7;

int num4=8;

(*head). Num=num1;

struct node second;

(second). Num=num2;

(second). Node=null;

(*head). Node=*second;

(*head). node//This is based on an address, take the contents of the address

(* (*head). node). num//This is based on this new address, to fetch the corresponding data,

Plainly, it's a double pointer.

C-language double pointer in-depth understanding