C ++类空类大小1个字节 [英] C++ class empty class size 1 byte

问题描述

我是C ++的新手，在C ++中发现了一个奇怪的特性。我看到一个空的大小是1个字节，我做了一些研究，发现是被做，因为每个对象必须有一个不同的地址。但我想知道被放置的1个字节的内容是什么。我知道它不持有这个指针，但它是一个虚拟字节或实际上有一些内容？

I am new to C++ and a found a peculiar feature in C++. I saw the size of an empty is 1 byte, I did some research and found out that is is done because every object must have a distinct address. But I want to know what is the content of that 1 byte that is placed. I know it does not hold the "this" pointer but is it a dummy byte or is there actually some content???

推荐答案

没有内容。

每个 class 或 struct 必须具有 sizeof 大于 0 ，根据您的行为。这是标准的预期和授权。

Every class or struct must have its sizeof greater than 0, ergo your behavior. It's expected and mandated by the standard.

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