有可能小于1字节写入文件 [英] It is possible to write less than 1 byte to a file

问题描述

据我所知在C最小单位是一个字节。哪里该约束从何而来？ CPU？

As far as I know the smallest unit in C is a byte. Where does this constraint comes from? CPU?

例如，我怎么能写轻咬或一个位到一个文件？

For example, how can I write a nibble or a single bit to a file?

推荐答案

不，你不能......文件以字节为单位组织的，它是最小的一块数据可以保存。

no, you can't... files are organized in bytes, it's the smallest piece of data you can save.

和，事实上，这1个字节将占据超过1个字节的空间，在一般。根据不同的操作系统，系统文件类型，等等，你都保存为文件将使用至少一个块。和块的大小根据你使用的文件系统的不同而不同。然后，这个1位将被写为1 - 字节，能够占据尽可能多的磁盘4kB的

And, actually, that 1 byte will occupy more than 1 byte of space, in general. Depending on the OS, the system file type, etc, everything you save as a file will use at least one block. And the block's size varies according to the file system you're using. Then, this 1-bit will be written as 1 - byte and can occupy as much as 4kB of your disk.

在维基你可以阅读一些有关字节是最小的数据单位在多台计算机上。

In wikipedia you can read something about the byte being the smallest data unit in many computers.

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