-> 之间的区别和 .在结构中? [英] Difference between -> and . in a struct?

问题描述

如果我有一个结构体

struct account {
   int account_number;
};

那和做有什么区别

myAccount.account_number;

和

myAccount->account_number;

还是没有区别?

如果没有区别，为什么不使用 . 表示法而不是 -> ?-> 看起来很乱.

If there's no difference, why wouldn't you just use the . notation rather than ->? -> seems so messy.

推荐答案

-> 是 (*x).field 的简写，其中 x 是指向一个struct account类型的变量，field是结构体中的一个字段，比如account_number.

-> is a shorthand for (*x).field, where x is a pointer to a variable of type struct account, and field is a field in the struct, such as account_number.

如果你有一个指向结构的指针，那么说

If you have a pointer to a struct, then saying

accountp->account_number;

比

(*accountp).account_number;

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