"." in the structure of C language And "- & gt;" Differences between

The same thing ： Both operators are binary operators , And its operator is the name of the structure member .

Difference ：“ . ” The operand to the left of the operator is a “ Structure ” The expression of , and “ -> ” The operand to the left of the operator is a pointer to the structure .

example ：

typedef struct

{

int num;

float score;

char name[10];

}STUDENT;

STUDENT temp;

STUDENT *p = &temp;

ad locum temp.score Represents the structure temp The members of score.

p->score Stands for pointing to temp Structural members score The pointer to .

For convenience and intuition ,C Language allows to put (*temp).score use p->score To replace . That is to say p->score Equivalence and (*temp).score.

So in the structure “ . ” and “ -> ” The usage of is similar to , But not equivalent .