＆QUOT;注册＆QUOT;关键字用C？ [英] "register" keyword in C?

问题描述

什么是注册关键字C语言吗？我已阅读，它用于优化但不以任何标准明确规定。它仍然是相关的，如果是这样，当你使用它？

What does the register keyword do in C language? I have read that it is used for optimizing but is not clearly defined in any standard. Is it still relevant and if so, when would you use it?

推荐答案

这是编译器一个暗示，该变量将被频繁使用，并且您推荐如果可能的话它被保存在一个寄存器。

It's a hint to the compiler that the variable will be heavily used and that you recommend it be kept in a processor register if possible.

大多数现代编译器做自动，并且在挑选他们比我们人类更好。

Most modern compilers do that automatically, and are better at picking them than us humans.

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