通过其地址在访问C位场 [英] Accessing bit-field in C by its address

问题描述

什么是背后不允许使用地址来访问在C位字段的原因，是它，因为它可能不是，是不是系统字对齐地址..？或者，因为它没有意义的一个字节中得到位地址......？（导致这种类型的指针运算会尴尬？）

What is the reason behind not allowing to access a bit field in C using its address, is it cause it might not be an address that is not system word aligned ..? or as it doesn't make sense to get bit's address within a byte...?(cause this types pointer arithmetic will be awkward ?)

推荐答案

位没有地址。这就是为什么你不能按地址引用它们。解决的粒度是字符。

Bits do not have addresses. That's why you can't refer to them by address. The granularity of addressing is the char.

我猜的理由是，语言是设计与之相匹配的目标架构，我知道没有机器它允许处理个人位的。

I guess the reasoning is that the language was design to match the architecture it targeted, and I know of no machine which allows addressing of individual bits.

这篇关于通过其地址在访问C位场的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！