What does '->' mean in C language?

What does "->" mean in C language?

"->" is a whole in C language. This symbol is used to point to the pointer to the sub-data in the structure, and the sub-data can be taken out. The usage method is first in C language Define a structure; then declare a pointer pointing to the structure; and finally use the symbol to point to the corresponding sub-data name.

Usage examples

/*定义结构体*/
struct Data
{
   int a,b,c;
};
/*定义结构体指针*/              
struct Data * p;
/*声明变量A*/
struct Data A = {1,2,3};
/*声明一个变量x*/
int x;
/*让p指向A*/
p = &A ; 
/*这句话的意思就是取出p所指向的结构体中包含的数据项a赋值给x*/
x = p->a;
/*由于此时p指向A，因而 p->a == A.a,也就是1*/

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