之间的区别 - ＆GT;和。在一个结构？ [英] Difference between -> and . in a struct?

问题描述

如果我有一个像结构

struct account {
   int account_number;
};

那么什么是干什么的区别

Then what's the difference between doing

myAccount.account_number;

和

myAccount->account_number;

或者是不是有区别？

or isn't there a difference?

如果没有区别，你为什么不只是使用 标记，而不是 - 方式＆gt; ？ - 方式＆gt; 显得那么凌乱

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

推荐答案

- >是（* X）点域，其中 X 是一个指针类型的变量结构帐户和字段是场在结构中，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.

如果你有一个指向一个结构，然后说：

If you have a pointer to a struct, then saying

accountp->account_number;

更加简练比

(*accountp).account_number;

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