什么是C ++中的流? [英] What is a stream in C++?

问题描述

我一直在听说流，更具体地说是文件流.

I have been hearing about streams, more specifically file streams.

那是什么?

它在内存中有位置吗?

其中包含数据吗?

这仅仅是文件和对象之间的连接吗?

Is it just a connection between a file and an object?

推荐答案

术语流是一种构造的抽象，该构造允许您发送或接收未知数量的字节.隐喻是水流.您可以获取数据，也可以根据需要发送.例如，将此与具有固定的已知长度的数组进行对比.

The term stream is an abstraction of a construct that allows you to send or receive an unknown number of bytes. The metaphor is a stream of water. You take the data as it comes, or send it as needed. Contrast this to an array, for example, which has a fixed, known length.

使用流的示例包括读取和写入文件，通过外部连接接收或发送数据.但是，术语 stream 是通用的，对于具体的实现方式一言不发.

Examples where streams are used include reading and writing to files, receiving or sending data across an external connection. However the term stream is generic and says nothing about the specific implementation.

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